Change p2c72 to p2a42 - Lenovo P2 Questions & Answers

Hi,
As you probably know, p2c72 is the Chinese variant of P2a42, or the other way around. Anyway, I start this thread as I've had nearly the same experience with k3 note. I had t5 which is again the chinese variant of a40 or sth like that. However, back then if I could remember, I could install anything. Perhaps because the retailers had changed its rom to ROW, I really don't know.
So, is the change here possible? In fact I assume when we get p2 from a Chinese retailer, most probably its rom should read P2a42. If that's the case, then there shouldn't be any problem with flashing roms related to P2a42, right?
Please shed some light on this if you can. :good:

Waiting eagerly for some news as well

Greight said:
Hi,
As you probably know, p2c72 is the Chinese variant of P2a42, or the other way around. Anyway, I start this thread as I've had nearly the same experience with k3 note. I had t5 which is again the chinese variant of a40 or sth like that. However, back then if I could remember, I could install anything. Perhaps because the retailers had changed its rom to ROW, I really don't know.
So, is the change here possible? In fact I assume when we get p2 from a Chinese retailer, most probably its rom should read P2a42. If that's the case, then there shouldn't be any problem with flashing roms related to P2a42, right?
Please shed some light on this if you can. :good:
Click to expand...
Click to collapse
For outside country they change into international Rom P2a42 so your right there is no problem with related rom

I'll explain the hardware differences between p2a42 and p2c72 and really hope this will end these questions that I see in every thread.
The difference is only in the ram, storage and 3g/4g bands.
P2a42
Ram 3/4GB
Storage: 32GB
Cellular networks:
GSM: GSM850/ GSM900/ GSM1800/ GSM1900
3G: UMTS2100 (B1)/ UMTS1900 (B2)/ UMTS850 (B5)/ UMTS900 (B8)
4G: LTE2100 (B1)/ LTE1800 (B3)/ LTE1700/2100 (B4)/ LTE850 (B5)/ LTE2600 (B7)/ LTE900 (B8)/ LTE800 (B20)/ LTE700 (B28[/ TD-LTE2600 (B38)/ TD-LTE2300 (B40)
P2c72
Ram 4GB
Storage: 32/64GB
Cellular networks:
GSM: GSM850/ GSM900/ GSM1800/ GSM1900
3G: UMTS2100 (B1)/ UMTS900 (B8)/ CDMA800 (BC0)/ TD-SCDMA2000/ TD-SCDMA1900
4G: LTE2100 (B1)/ LTE1800 (B3)/ TD-LTE2600 (B38)/ TD-LTE1900 (B39)/ TD-LTE2300 (B40)/ TD-LTE2500 (B41)

https://forum.xda-developers.com/lenovo-p2/how-to/stock-rom-t3552973 I flash this rom on P2c72 ,all function works well, maybe you need ss to activation the Google Account

You can flash every rom available for p2a42 on p2c72, just edit the updater-script removing the assert get prop lines in the beginning.

These two phones has different bands but their roms works at each other.So just remove getprop line from the updater-script and flash the rom.

can someone please explain how to remove getprop line from the updater-script and flash the rom.
I bought the P2c72 from china and updated it to: V3.5_1652_5.1342.1_ST_p2c72.
Thanks

911-Future_Maker said:
You can flash every rom available for p2a42 on p2c72, just edit the updater-script removing the assert get prop lines in the beginning.
Click to expand...
Click to collapse
I have removed this from updater-script
Code:
getprop("ro.product.device") == "P2a42" || abort("E3004: This package is for \"P2a42\" devices; this is a \"" + getprop("ro.product.device") + "\".");
however i used System Update App then looked for my modified zip. fails at verification of the zip file.

Hi,
I'm buying a p2c72. I just wanted to confirm that the following will work after changing to the p2a42 rom?
a) I can unlock bootloader
b) I can install TWRP
c) I can install any p2a42 custom ROM (after removing the get-prop line)
Has anyone on the p2c72 had any problems rooting and flashing so far?

Asking also if I buy p2c72 (I don't need b20) can I install official European ROM on it and get automatic updates after that?

I've just received my P2C72.
1) It was updated to p2a42 by the seller so I didn't need to do anything in that regard.
2) I've just requested bootloader unlock, so I have to wait 14 days.
3) I did not need chinese phone number to request bootloader unlock.
Once I have the bootloader unlocked, I'll proceed to install TWRP, gain root, and flash a custom ROM.
I'll update here once I've done those so that future p2c72 users can benefit. You'll hear back from me in 2-3 weeks.

Update on p2c72 custom roms.
I've gotten bootloader unlock. It was quite easy.
1) I've installed TWRP 3.1.1.0. It works without any problems.
- please note that after booting into TWRP through fastboot, I realized that the stock recovery was still installed.
- if that happens for you, take an extra step of transferring the TWRP img into teh phone and installing the img using TWRP.
2) Not working: I've tried Resurrection Remix v5.8.3, Lineage OS 14.1, and AICP 12.1. All of these don't work. with RR and Lineage I only get a blank screen and the notification LED burns blue. With AICP, I get the bootscreen but it doesn't progress any further.
3)Working: Lineage OS 13.0 works.
- This may be related to the fact that I started wit ha stock marshmallow ROM. It seems only the marshmallow Lineage 13.0 is working so far.
Good luck to other p2c72 users. If you have any roms that worked for you, please update here for the others to benefit from. Thanks.

Lodd said:
Update on p2c72 custom roms.
I've gotten bootloader unlock. It was quite easy.
1) I've installed TWRP 3.1.1.0. It works without any problems.
- please note that after booting into TWRP through fastboot, I realized that the stock recovery was still installed.
- if that happens for you, take an extra step of transferring the TWRP img into teh phone and installing the img using TWRP.
2) Not working: I've tried Resurrection Remix v5.8.3, Lineage OS 14.1, and AICP 12.1. All of these don't work. with RR and Lineage I only get a blank screen and the notification LED burns blue. With AICP, I get the bootscreen but it doesn't progress any further.
3)Working: Lineage OS 13.0 works.
- This may be related to the fact that I started wit ha stock marshmallow ROM. It seems only the marshmallow Lineage 13.0 is working so far.
Good luck to other p2c72 users. If you have any roms that worked for you, please update here for the others to benefit from. Thanks.
Click to expand...
Click to collapse
Ya.. i have the same P2c72 running on P2a42 stock MM.. upgraded to Nougat S233 and at first i was afraid that things may not work after bootloader unlocked...But with the newest TWRP 3.1.1.0 worked for me. I remember that i used another version of TWRP, and for certain none of the Roms worked.. until using the pre-official 3.1.1.0 that is official now.
Can flash whatever Rom with out problem. I'm on Stock Nougat Deodexed S233 and staying with it for a while. :good:

Wmateria said:
Ya.. i have the same P2c72 running on P2a42 stock MM.. upgraded to Nougat S233 and at first i was afraid that things may not work after bootloader unlocked...But with the newest TWRP 3.1.1.0 worked for me. I remember that i used another version of TWRP, and for certain none of the Roms worked.. until using the pre-official 3.1.1.0 that is official now.
Can flash whatever Rom with out problem. I'm on Stock Nougat Deodexed S233 and staying with it for a while. :good:
Click to expand...
Click to collapse
Thanks for the info Wmateria. That's good to know that you can flash all roms.
After messing around and flashing other roms a few times, somehow resurrection remix works for me now.
Unfortunately I'm not sure what I did to allow that to happen.
At least now there are 2 users (Wmateria and me) who can flash custom roms meant for p2a42.
I should note that I haven't changed the roms in any way (haven't removed the assert get prop line either).
I'll update again if anything else develops.

Lodd said:
Thanks for the info Wmateria. That's good to know that you can flash all roms.
After messing around and flashing other roms a few times, somehow resurrection remix works for me now.
Unfortunately I'm not sure what I did to allow that to happen.
At least now there are 2 users (Wmateria and me) who can flash custom roms meant for p2a42.
I should note that I haven't changed the roms in any way (haven't removed the assert get prop line either).
I'll update again if anything else develops.
Click to expand...
Click to collapse
@Billytromp is also another one too. He was the one i asked about if it was safe to use the device to flash.

I've recently purchased a Lenovo p2c72. I'm entirely new to custom roms and Android Tinkering, but I really want to make my phone feel like it's not Chinese phone. I've kinda got the gist or basics on how to flash custom roms, but I have a few questions:
1. Will I be able to install future Android updates with a custom rom?
2. Will the installation be straightforward (download rom>install recovery>install rom>end)? Cos I read in the thread that you need bootloader unlock to install TWRP which I assume is a recovery app of some sort.
3. By installing a custom rom, will it include the various Google apps preinstalled in other non-Chinese phones?
Thank you.

@Wmateria. I saw @Billytromp's posts in the TWRP thread saying it went fine which gave me courage to flash TWRP. I also saw some of his posts where he got the black screen with blue LED with some ROMs. If we can gatehr a few more members and more info, maybe we can make a guide thread.
@bl00dsoaked. If you just put in a non-china sim into the phone and boot it, they say that the phone will auto download the p2a42 global rom and change it. This way you have the english version (except for band 20 for 4G) and it can also get future updates easily. Google apps should also be auto installed.
If for some reason that doesn't happen for you, there should be a way to flash the english version without unlocking bootloader or getting root. It uses adb but I've never done it myself.

@bl00dsoaked. If you just put in a non-china sim into the phone and boot it, they say that the phone will auto download the p2a42 global rom and change it. This way you have the english version (except for band 20 for 4G) and it can also get future updates easily. Google apps should also be auto installed.
If for some reason that doesn't happen for you, there should be a way to flash the english version without unlocking bootloader or getting root. It uses adb but I've never done it myself.
Click to expand...
Click to collapse
@Lodd
Unfortunately this doesn't work. Unless there's some other tinkering I had to do other than just putting a sim in?
Sorry, what's adb?

bl00dsoaked said:
@Lodd
Unfortunately this doesn't work. Unless there's some other tinkering I had to do other than just putting a sim in?
Sorry, what's adb?
Click to expand...
Click to collapse
4G you say? Like the american 4G or Europe 4G?

Related

BLN-L24 links have bad key in the Honor 6x Repository thread

Need to rollback, or be advised of any custom ROMS that work..
Try Elite ROM from ROM section. it should work fine.
I personally would not recommend installing Elite ROM as it is more hassle than it is worth when you try to switch ROMs. It re/debrands your device and even after restoring a nandroid your audio will not work nor will your camera function properly. What files have bad keys? I put a lot of those up and the keys should work fine....
@shashank1320 check the links in the BLN-L24 section....something got messed up when you copied my links as mine work.
@ghostair is your device bricked? IMO none of the ROMs for this phone are worth installing on a main phone because there is too much functionality lost, no disrespect to the devs. Elite ROM does have the least amount of bugs but it is a hassle as I mentioned earlier. My main gripe about it is when installing and uninstalling apps you must restart the device in order for the apps to be added or removed from the app drawer....its a major annoyance.
BLN-L24C567B110 Thanks to @Dazed No More
boot - https://mega.nz/#!ceRkHQoA!L8MECn8Ul...8JwO7ZuVEEr8mk
recovery - https://mega.nz/#!sOZAUJTZ!QKKROoWkI...UPNDwL79ZI1yQI
BLN-L24C567B360 Thanks to @Dazed No More
boot - https://mega.nz/#!hDQB3RCT!YTH2j1IhJ...y_prJHEgHdSrxg
recovery - https://mega.nz/#!Fa4DBbxS!XDIczpXcr...TApUtNvcOMEDnc
TWRP 3.1.1 didn't work for me, nor did EliteROM or his version of TWRP.
ghostair said:
TWRP 3.1.1 didn't work for me, nor did EliteROM or his version of TWRP.
Click to expand...
Click to collapse
Is your device bricked? You say you want to rollback, but have you started the process....what firmware are you on?
Dazed No More said:
....
@shashank1320 check the links in the BLN-L24 section....something got messed up when you copied my links as mine work.
.
Click to expand...
Click to collapse
Let me check mate. Thanks for pointing that out.
No it's not bricked, actually I am on TWRP 3.1.1-0, it was only EliteROM's version that didn't work. I haven't even been able to use the phone at all, for a week, and am currently on LineageOS 13 as it was only release that works for my model it seems.
ghostair said:
No it's not bricked, actually I am on TWRP 3.1.1-0, it was only EliteROM's version that didn't work. I haven't even been able to use the phone at all, for a week, and am currently on LineageOS 13 as it was only release that works for my model it seems.
Click to expand...
Click to collapse
Im confused....your original post says you need to rollback but you say you are currently on LOS 13?? Rolling back refers to downgrading from Android 7.0 (Nougat) to 6.0.1 (MM) but you are already on MM if you are running LOS 13. You also say your device is not bricked but then in the next sentence say you havent been able to use it at all for a week.....and lastly you say LOS 13 was the only release to work for your model yet every single ROM in the development forum can be flashed to the BLN-L24, I know because I have done it.
What exactly are you trying to accomplish here? Your posts are contradictory and make no sense. Id be glad to help but you gotta give me something to work with here.
Im assuming you did not make a full backup in TWRP before flashing any ROMs, in which case you have learned a valuable lesson....always have a backup. But since you dont we will get you back to EMUI which I assume is what you mean when you say roll back.
Dazed No More said:
Im confused....your original post says you need to rollback but you say you are currently on LOS 13?? Rolling back refers to downgrading from Android 7.0 (Nougat) to 6.0.1 (MM) but you are already on MM if you are running LOS 13. You also say your device is not bricked but then in the next sentence say you havent been able to use it at all for a week.....and lastly you say LOS 13 was the only release to work for your model yet every single ROM in the development forum can be flashed to the BLN-L24, I know because I have done it.
What exactly are you trying to accomplish here? Your posts are contradictory and make no sense. Id be glad to help but you gotta give me something to work with here.
Click to expand...
Click to collapse
I understand, I probably should have just used, "go back," to EMUI. Since LOS 13 isn't usable in the least, as I can't make calls, and it drops LTE.
If they work then how? I followed everything, flashing vendor.img with fastboot, then flashing the respective zip?
I'd rather not go back to EMUI, it's why I haven't been able to actually "use it as a phone," since purchase.
Why would you not want to go back to EMUI? Its smooth and everything works. EMUI is the reason you havent been able to use it as a phone?? There is not one single ROM for this device that works entirely and has full functionality. You're always going to be missing something whether its the camera, LTE, calls, etc.
You're going to have to go back to EMUI so you can update to Anrdoid 7.0 (be sure to make a full backup) and then flash away all the ROMS you like and you will see they are all broken in some way. This is most definitely not the phone to use if you are looking for polished ROMs.
My last tip before departing......download the flashable vendor zip if you still want to mess around with the ROMs, it makes life much easier. Its in one of the threads in that forum I think AOKP

Moto Z2 Force Xt1789-06 UK Vodafone Oreo update?

Got a good deal on a moto z2 force (with 3 moto mod accessories, so had to snap it up) - From Vodafone UK
Question about Oreo updates on this phone. Does not exist yet as I believe it is down to the carrier and networks to finalise, test and release, hence the delays.
I am aware that there are quite a few oreo firmware for retail models. (Although none exist yet for XT1789-06?) I have already unlocked the bootloader and I wanted to update to the recent ones. What I am worried about is the IMEI baseband. Anyone had success with this specific model (06)?
There's root, su ,magisk and xposed on this thread thanks to enetec.
https://forum.xda-developers.com/z2...w-to-safely-blunlock-twrp-root-t3704596/page1
Have not seen any oreo related updates, I did read on another thread that the t-mobile Oreo update was pulled because it was having issues with calls I think so maybe our version they are having the same issues. Have not even found a flash all file for our device so one a bit hesitant about even trying any other Rom.
Official bootable and flashable twrp works on nougat. Sprint wasn't on Oreo until late Feb z so I have used the first iteration on my phone before the Oreo OTA. It will have decryption support which is advised compared to encryption not working. That's a huge security risk. I'd suggest using official twrp and magisk if you want root. That way you keep encryption.
thealgorithm said:
Got a good deal on a moto z2 force (with 3 moto mod accessories, so had to snap it up) - From Vodafone UK
Question about Oreo updates on this phone. Does not exist yet as I believe it is down to the carrier and networks to finalise, test and release, hence the delays.
I am aware that there are quite a few oreo firmware for retail models. (Although none exist yet for XT1789-06?) I have already unlocked the bootloader and I wanted to update to the recent ones. What I am worried about is the IMEI baseband. Anyone had success with this specific model (06)?
Click to expand...
Click to collapse
Hi there updated mine to Oreo with the file in this link https://mirrors.lolinet.com/firmware/moto/nash/official/RETAIL just follow the instructions in the link In post 2 on this thread, I'm pretty sure you can skip the unlocking bootloader (unless you want root as I do)
No, the above is no good for my carrier/phone (Vodaphone UK) Results in wifi and modem not working. Also 3 sparse files are missing. Used a US based USC Oreo rom and works perfectly now however
thealgorithm said:
No, the above is no good for my carrier/phone (Vodaphone UK) Results in wifi and modem not working. Also 3 sparse files are missing. Used a US based USC Oreo rom and works perfectly now however
Click to expand...
Click to collapse
I had the the wifi problem when i flashed twrp (but still had network), then flashed the rom in my last post I am also on the uk vodafone model. could you post a link to the rom you flashed please.
It was this one https://androidfilehost.com/?fid=962187416754473797
It did give error in regards to the bootloader writing (and timed out - so did not overwrite bootloader) - I already have bootloader unlocked and was on Nougat when I recieved the phone. After updating to oreo, however with the exception of the carrier logo during boot, I have found no issues whatsoever with this rom on a Vodafone XT1789-06 UK model device. I also uninstalled or disabled US based applications / carrier bloat.
Everything works fine (Moto mods, Wifi, network, camera, 3d acceleration) etc
(Note, ignore the fact that the download is from the MotoZ2 play folder, there was no new directory for Z2 Force according to the uploader)
Cheers for the link already had this file downloaded but didn't flash it as I noticed it was a us Version. there was a update at 19:30 on the link I posted but have not flashed it yet, no bloatware on this rom just plain stock and all mods work will flash the update sometime over the weekend and let you know how it goes.
I tried the newer version recently and same issue (no wifi or modem), so reverted back to USC version
Hello guys i also have the z2 force on UK Vodafone and looking for a 8.0 update. Did you guys find one that completely works? i dont want to unlock the bootloader or root (stops my bank app).
Any news on this please?
sc0use said:
Hello guys i also have the z2 force on UK Vodafone and looking for a 8.0 update. Did you guys find one that completely works? i dont want to unlock the bootloader or root (stops my bank app).
Click to expand...
Click to collapse
Unlocking bootloader doesn't stop Banking apps but root will, I have an unlocked bootloader and on the xt1789-06 Vodafone UK running stock ROM from the link I posted above got both nationwide and Barclays apps and both run fine if you flash the first n version it will do all the seamless updates, it just seems Vodafone are a bit slow at pushing them.

Upgrade from Nougat custom ROM, baseband update, Treble - Need some Help please

Hi Friends
I have been using crDroid 7.1.2 on Zuk Z2 plus for last 1 year almost. Tried a few ROMs at that time and settled with crDroid. Did not get much time after that due to hectic work schedules.
Now, I am planning to upgrade to a stable Oreo Rom. AEX and Jaguar seem most popular, but I would experiment with few others like crDroid as well.
However, I have few concerns and doubts where I would request your guidance and help. I did some research myself and went through lot of threads but still some questions remain:
1) I face two irritating issues on my phone. Not sure if it is a device issue or ROM or baseband issue:
a) While on speaker on a call, the person on the other side cannot hear me clearly. My voice is extremely distorted.
b) Same happens on call recordings even without being on speaker. My voice is totally distorted in all call recordings.
So, someone suggested me to update baseband by flashing ZUI 1.9 and subsequent versions. My current baseband is 1.76 Indian. Multiple doubts on how to go about doing this safely and efficiently:
a) Do I need to flash complete Chinese ZUI ROMs in this sequence? 1.9 -> 3.5 -> 4.0? Does the 4.0 ZUI support VoLTE?
b) How to flash these, QPST, TWRP, QFIL - See different options mentioned in different threads.
c) Also, saw some directly flashable baseband zips without the need to flash ZUIs or to flash baseband 1.70 chinese first.
https://forum.xda-developers.com/le...oreo-firmwarebaseband-twrp-flashable-t3776254
https://forum.xda-developers.com/lenovo-zuk-z2/how-to/baseband-radiomodem-z2-plus-twrp-t3749988
https://forum.xda-developers.com/showpost.php?p=75584934&postcount=9
Which is the latest and most stable baseband version. I understood that the baseband version number doesn't change but there are updates on each version of ZUI.
How to fallback to 1.76 Indian baseband in case something goes wrong.
Please suggest what is the best and safest approach. Not much awareness of usage of QPST, QFIL etc. Used TWRP before for flashing ROMs. Do not want to end up bricking my device.
2) If I flash these Chinese ZUI ROMs, I guess the bootloader will be relocked? I have the unlock_bootloader.img which I originally used to unlock the bootloader. Guess, that can be reused to unlock it again. Just wanted to confirm, no other complications here?
3) About Treble and Non Treble TWRPs and ROMs, which one is preferable? After flashing the Chinese ZUIs or directly flashing latest Basebands depending on outcome of point 1, I believe I will have to flash the latest TWRP (Treble / Non Treble). Also, accordingly I believe I will need to change the partition name: Factory2Vendor ?
4) Which ROM and Kernel combination would you suggest. Priorities are No bugs, good Battery life, VoLTE, Less heating, Smooth UI and customizations like in AEX / crDroid / RR etc. Gaming is not priority.
Also, in my current crDroid Nougat, although Magisk Hide, hides the root from most apps but some apps like Google Tez, Microsoft Intune Company portal etc detect the root and does not allow usage. I need to have my official mailbox setup via Microsoft Company portal and Outlook. Which is not allowed on crDroid Nougat with Magisk but works fine on my Moto G running on Lineage OS 7.1.2 (Unrooted).
5) Finally, anything else which I might be missing or not considering? Please suggest me high level steps for the above. Specially for point 1.
Kindly help.
@kubersharma @weimerd @Andro Enthusiast @vuckovic_stefan @anbinhv @aswin_a_s @Dhananjay_Yadav @mGforCe
Request some inputs please. Planning to do this today, so kindly help
I didn't read the whole post as it is really long.
But I understood it is about baseband.
You can flash the baseband and other firmwares from zui 4 without any problem via twrp itself.
But as far as I know 1.76 also works pretty well.
selvarajrajkanna said:
I didn't read the whole post as it is really long.
But I understood it is about baseband.
You can flash the baseband and other firmwares from zui 4 without any problem via twrp itself.
But as far as I know 1.76 also works pretty well.
Click to expand...
Click to collapse
Thanks and Sorry for the long post. Not only about baseband, but I want to upgrade to an Oreo Rom.
Someone suggested to change the baseband as well as I am facing following two issues:
1) If I put the phone on speaker while on a call, the person on other side cannot hear me clearly. Extremely distorted voice.
2) My voice is very distorted in all call recordings.
So, I thought I would try updating the baseband by ZUI chinese flash incrementally.
Kindly check my main post and suggest the steps.
Also, if the chinese baseband doesn't works well, how can I come back to 1.76?
But as you suggested the latest baseband can be directly flashed using TWRP, shall I flash this:
https://forum.xda-developers.com/showpost.php?p=75584934&postcount=9
saurav_k said:
Thanks and Sorry for the long post. Not only about baseband, but I want to upgrade to an Oreo Rom.
Someone suggested to change the baseband as well as I am facing following two issues:
1) If I put the phone on speaker while on a call, the person on other side cannot hear me clearly. Extremely distorted voice.
2) My voice is very distorted in all call recordings.
So, I thought I would try updating the baseband by ZUI chinese flash incrementally.
Kindly check my main post and suggest the steps.
Also, if the chinese baseband doesn't works well, how can I come back to 1.76?
But as you suggested the latest baseband can be directly flashed using TWRP, shall I flash this:
https://forum.xda-developers.com/showpost.php?p=75584934&postcount=9
Click to expand...
Click to collapse
I might advice otherwise.
Keep the same baseband and update to oreo.
Arrow os 8.1 might get updated tomorrow try it.
Have you done the factory to vendor zip flashing process?
selvarajrajkanna said:
I might advice otherwise.
Keep the same baseband and update to oreo.
Arrow os 8.1 might get updated tomorrow try it.
Have you done the factory to vendor zip flashing process?
Click to expand...
Click to collapse
No. Not yet. Still on Nougat old custom rom from last year. If I have to flash ZUI then Factory to Vendor has to be done later I believe? That's why waiting to get more advises from this thread before deciding the course of action
This is my current setup.
This rom used to give excellent battery life and deep sleep earlier but now loses lot of battery overnight. Always awake
saurav_k said:
No. Not yet. Still on Nougat old custom rom from last year. If I have to flash ZUI then Factory to Vendor has to be done later I believe? That's why waiting to get more advises from this thread before deciding the course of action
Click to expand...
Click to collapse
Don't flash zui.
Follow this guide
https://forum.xda-developers.com/lenovo-zuk-z2/how-to/z2plus-treble-roms-flashing-reverting-t3778287
Then you can install both treble and non-treble roms.
If you want to go back to zui then you can qfil without any issue.
Cheers
saurav_k said:
Hi Friends
I have been using crDroid 7.1.2 on Zuk Z2 plus for last 1 year almost. Tried a few ROMs at that time and settled with crDroid. Did not get much time after that due to hectic work schedules.
Now, I am planning to upgrade to a stable Oreo Rom. AEX and Jaguar seem most popular, but I would experiment with few others like crDroid as well.
However, I have few concerns and doubts where I would request your guidance and help. I did some research myself and went through lot of threads but still some questions remain:
1) I face two irritating issues on my phone. Not sure if it is a device issue or ROM or baseband issue:
a) While on speaker on a call, the person on the other side cannot hear me clearly. My voice is extremely distorted.
b) Same happens on call recordings even without being on speaker. My voice is totally distorted in all call recordings.
So, someone suggested me to update baseband by flashing ZUI 1.9 and subsequent versions. My current baseband is 1.76 Indian. Multiple doubts on how to go about doing this safely and efficiently:
a) Do I need to flash complete Chinese ZUI ROMs in this sequence? 1.9 -> 3.5 -> 4.0? Does the 4.0 ZUI support VoLTE?
b) How to flash these, QPST, TWRP, QFIL - See different options mentioned in different threads.
c) Also, saw some directly flashable baseband zips without the need to flash ZUIs or to flash baseband 1.70 chinese first.
https://forum.xda-developers.com/le...oreo-firmwarebaseband-twrp-flashable-t3776254
https://forum.xda-developers.com/lenovo-zuk-z2/how-to/baseband-radiomodem-z2-plus-twrp-t3749988
https://forum.xda-developers.com/showpost.php?p=75584934&postcount=9
Which is the latest and most stable baseband version. I understood that the baseband version number doesn't change but there are updates on each version of ZUI.
How to fallback to 1.76 Indian baseband in case something goes wrong.
Please suggest what is the best and safest approach. Not much awareness of usage of QPST, QFIL etc. Used TWRP before for flashing ROMs. Do not want to end up bricking my device.
2) If I flash these Chinese ZUI ROMs, I guess the bootloader will be relocked? I have the unlock_bootloader.img which I originally used to unlock the bootloader. Guess, that can be reused to unlock it again. Just wanted to confirm, no other complications here?
3) About Treble and Non Treble TWRPs and ROMs, which one is preferable? After flashing the Chinese ZUIs or directly flashing latest Basebands depending on outcome of point 1, I believe I will have to flash the latest TWRP (Treble / Non Treble). Also, accordingly I believe I will need to change the partition name: Factory2Vendor ?
4) Which ROM and Kernel combination would you suggest. Priorities are No bugs, good Battery life, VoLTE, Less heating, Smooth UI and customizations like in AEX / crDroid / RR etc. Gaming is not priority.
Also, in my current crDroid Nougat, although Magisk Hide, hides the root from most apps but some apps like Google Tez, Microsoft Intune Company portal etc detect the root and does not allow usage. I need to have my official mailbox setup via Microsoft Company portal and Outlook. Which is not allowed on crDroid Nougat with Magisk but works fine on my Moto G running on Lineage OS 7.1.2 (Unrooted).
5) Finally, anything else which I might be missing or not considering? Please suggest me high level steps for the above. Specially for point 1.
Kindly help.
@kubersharma @weimerd @Andro Enthusiast @vuckovic_stefan @anbinhv @aswin_a_s @Dhananjay_Yadav @mGforCe
Click to expand...
Click to collapse
Best means BEST i.e. Resurrection Remix Final Stable Oreo 8.1
This rom is soo good and most featured in market right now. Give it a try u will love it ?
Thisisaarush said:
Best means BEST i.e. Resurrection Remix Final Stable Oreo 8.1
This rom is soo good and most featured in market right now. Give it a try u will love it
Click to expand...
Click to collapse
Never quote OP.

Pre-Sales question

Hi all,
I am completely new to the Xiaomi world (I prefer stock Android and easy root usually), but I got an excellent offer to buy this beast today.
I will buy this device, only if the following is possible.
- Unlock bootloader
- Root with Magisk
- Pass Safetynet check
- Install AFWall
- Install Adaway
Has anybody done this yet?
I don't want to know "how" (I can ask/figure out that later). I just want to know whether it is possible/relatively straight forward?
Thanks!
palmdude said:
Hi all,
I am completely new to the Xiaomi world (I prefer stock Android and easy root usually), but I got an excellent offer to buy this beast today.
I will buy this device, only if the following is possible.
- Unlock bootloader
- Root with Magisk
- Pass Safetynet check
- Install AFWall
- Install Adaway
Has anybody done this yet?
I don't want to know "how" (I can ask/figure out that later). I just want to know whether it is possible/relatively straight forward?
Thanks!
Click to expand...
Click to collapse
Yes, all done. Very easy and straightforward. Stick to xiaomi.eu roms for best miui experience or latest AICP Oreo treble rom for 95-99% working Android stock experience. Currently on 8.8.9 xiaomi.eu and have all except afwall on mine since I don't use that app.
I recommend the 6gb/128gb from TradingShenzhen with xiaomi.eu installed - it will have unlocked bootloader right out of the box - many of us went with this version. Easiest/best experience.
If you go with any other version, check out my buggy vendor thread to flash to xiaomi.eu rom easily.
opasha said:
Yes, all done. Very easy and straightforward. Stick to xiaomi.eu roms for best miui experience or latest AICP Oreo treble rom for 95-99% working Android stock experience. Currently on 8.8.9 xiaomi.eu and have all except afwall on mine since I don't use that app.
I recommend the 6gb/128gb from TradingShenzhen with xiaomi.eu installed - it will have unlocked bootloader right out of the box - many of us went with this version. Easiest/best experience.
If you go with any other version, check out my buggy vendor thread to flash to xiaomi.eu rom easily.
Click to expand...
Click to collapse
Quick follow up question. Is it possible to keep encryption on the userdata partition with the latest TWRP? I really like if my data is encrypted.
opasha said:
I recommend the 6gb/128gb from TradingShenzhen with xiaomi.eu installed - it will have unlocked bootloader right out of the box - many of us went with this version. Easiest/best experience.
Click to expand...
Click to collapse
Thanks for the hint!
I guess keeping encryption seems to be possible? Using the unofficial TWRP by @nijel8
https://forum.xda-developers.com/mi-max-3/development/recovery-twrp-3-2-3-1-nitrogen-t3866084
Right?
Thanks @nijel8 and @opasha ! I am glad we have geniuses like you on this device.
palmdude said:
I guess keeping encryption seems to be possible? Using the unofficial TWRP by @nijel8
https://forum.xda-developers.com/mi-max-3/development/recovery-twrp-3-2-3-1-nitrogen-t3866084
Right?
Thanks @nijel8 and @opasha ! I am glad we have geniuses like you on this device.
Click to expand...
Click to collapse
Encryption is possible. @nijel8 will have more knowledge since he created a modded TWRP. See this thread regarding encryption: https://www.google.com/amp/s/forum.xda-developers.com/mi-max-3/help/encrypt-phone-t3845117/amp/
You are most welcome :highfive:.
Thanks again. I will order now.
Talk to you all again in 720 hours
I got my device today. I like it!! I got the global version 9.6.7.0.
Looks like I "only" need to wait 360 hours to unlock
---
I have a three more questions now.
#1 Is there a reason not to use this global 9.6.7.0 ROM (other than the ads). Are there any big bugs in this global version? If not, I will probably start rooting this version first Should I update the global version?
#2 You mentioned
opasha said:
Currently on 8.8.9 xiaomi.eu
Click to expand...
Click to collapse
There seem be to many newer versions than that. And also a "MIUI 10.0/10.1 STABLE RELEASE" (oct 24th). Is there a reason you are still on that old version?
#3 I understand not having ARB is better if you need to downgrade (without bricking). Is there a reason to downgrade frequently in the Xiaomi world? Is this because people need to switch back and forth between the Chinese and global ROM? And since I have the global version, can I ignore ARB?
palmdude said:
I got my device today. I like it!! I got the global version 9.6.7.0.
Looks like I "only" need to wait 360 hours to unlock
---
I have a three more questions now.
#1 Is there a reason not to use this global 9.6.7.0 ROM (other than the ads). Are there any big bugs in this global version? If not, I will probably start rooting this version first Should I update the global version?
#2 You mentioned
There seem be to many newer versions than that. And also a "MIUI 10.0/10.1 STABLE RELEASE" (oct 24th). Is there a reason you are still on that old version?
#3 I understand not having ARB is better if you need to downgrade (without bricking). Is there a reason to downgrade frequently in the Xiaomi world? Is this because people need to switch back and forth between the Chinese and global ROM? And since I have the global version, can I ignore ARB?
Click to expand...
Click to collapse
1) EU is just better (has more features baked in - universal face unlock, theme store, etc), less bloated, and more updated.
2) Stable release is fine, but I just prefer beta updates - faster fixes, more features introduced, and tested more by users = more feedback.
I'm on 8.8.9 eu strictly because:
a) It's pretty flawless for me.
b) If it's not broken why fix it? I haven't seen anything worth jumping ship for.
c) It's NON-ARB; I'll only upgrade to ARB if and once I see a better working pie release (coming soon supposedly) because a data wipe may be necessary. I'll use migrate app (faster than titanium backup) to backup all my apps and then restore them onto the new rom.
3) Honestly, having ARB is not a big issue especially since the updated EU roms are solid. However, my points back in number 2 still stand. You can flash to and back from treble gsi roms on ARB and NON-ARB without any issues. However, no matter what anyone tells you, gsi roms for our phone are not perfect. They're only 95% usable. They are still missing mono speaker, volte, and some other things that some say are working without evidence or thorough testing. @MrColdbird just tested a few of the latest if not all of the gsi roms, and he's in agreement with me - they're almost there, but not 100% yet. Stick to xiaomi.eu roms for a complete rom. Just my humble opinion .
If you have any other questions, just ask. I hope this was informative enough.
@opasha @MrColdbird
Have u guys tried latest AOSPExtended Pie GSI? I loved this rom on my previous device.
https://downloads.aospextended.com/download/treble_gsi/pie_arm64_aonly/AospExtended-v6.0-arm64_aonly-20181117-0000-OFFICIAL.zip
Currently I'm also on 8.8.9 run and waiting for Pie build.
Anyone tried cutting of files from firmwareupdate folder to avoid ARB activation.
I've found solution that cutting firmware folder, leaving only files associated with modem shouldn't break anything and won't trigger ARB. Is it working on latest eu builds?
Files that allegedly have to stay in firmwareupate folder to not trigger arb:
.BTFM.bin
cmnlib.mbn
cmnlib64.mbn
devcfg.mbn
dspso.bin
NON_HLOS.bin
splash.img
Click to expand...
Click to collapse
If anyone tested please confirm
opasha said:
If you have any other questions, just ask. I hope this was informative enough.
Click to expand...
Click to collapse
Thanks! And yes, this was very informative and helpful! Thanks for your time.
Regarding
> I'm on 8.8.9 eu strictly because ... It's NON-ARB
I was under the impression that EU is non-arb by design?
https://xiaomi.eu/community/threads/do-eu-roms-remove-anti-rollback.47145/#post-451617
I guess I haven't understood this ARB stuff 100% yet? And obviously this is a moving target. Posts only one or two months might be already outdated haha
Having said that, you convinced me about Eu.
And I guess in 15 days there will be new developments anyway (no pun intended).

LineageOS 17.1 18.0 new builds

Initial topic - https://forum.xda-developers.com/lg-v40/development/android-10-0-0-lineageos-17-0-v40-t3970119
So far I am only doing compilation without testing the result.
Download:
LOS-17.1
Latest build: lineage-17.1-20200304-UNOFFICIAL-judypn
lineage-17.1-20210304-UNOFFICIAL-judypn.zip
drive.google.com
Prev.:lineage-17.1-20201118-UNOFFICIAL-judypn
https://drive.google.com/drive/folders/1QT_yRNtydEZmplZvl5oSq1xiySv53NK9?usp=sharing
LOS-18.0
Latest build: lineage-18.0-20201126-UNOFFICIAL-judypn
https://drive.google.com/drive/folders/17d7f1QdUoljNnU00VRJYC776KhAwIq4R?usp=sharing
Contributors
xenius9, SGCMarkus
Many thanks to SGCMarkus for the sources.
xenius9 said:
Initial topic - https://forum.xda-developers.com/lg-v40/development/android-10-0-0-lineageos-17-0-v40-t3970119
So far I am only doing compilation without testing the result.
Click to expand...
Click to collapse
Is LOS 18.0 "Pre Alpha or Alpha" suitable for daily use?
Haven't noticed exact description what works and what are the current bugs.....
xenius9 said:
Initial topic - https://forum.xda-developers.com/lg-v40/development/android-10-0-0-lineageos-17-0-v40-t3970119
So far I am only doing compilation without testing the result.
Download:
LOS-17.1
Latest build: lineage-17.1-20201118-UNOFFICIAL-judypn
https://drive.google.com/drive/folders/1QT_yRNtydEZmplZvl5oSq1xiySv53NK9?usp=sharing
LOS-18.0
Latest build: lineage-18.0-20201126-UNOFFICIAL-judypn
https://drive.google.com/drive/folders/17d7f1QdUoljNnU00VRJYC776KhAwIq4R?usp=sharing
Contributors
xenius9, SGCMarkus
Many thanks to SGCMarkus for the sources.
Click to expand...
Click to collapse
Do you think most of the bugs will be cleared out by the end of the year? Also, which kdz should I use if I want band 71 support?
camray00 said:
Do you think most of the bugs will be cleared out by the end of the year? Also, which kdz should I use if I want band 71 support?
Click to expand...
Click to collapse
I don't know anything about the bugs, but for b71 2 of the roms have it; US OP Pie (no Q yet) and KR OP which is Korean Open (Q version available) has b71 also.
cheers
AsItLies said:
I don't know anything about the bugs, but for b71 2 of the roms have it; US OP Pie (no Q yet) and KR OP which is Korean Open (Q version available) has b71 also.
cheers
Click to expand...
Click to collapse
I was thinking it might be possible to grab the modem partition from sprint or unlocked pie and write them over before installing this ROM. Would that work, or would it be incompatible?
camray00 said:
I was thinking it might be possible to grab the modem partition from sprint or unlocked pie and write them over before installing this ROM. Would that work, or would it be incompatible?
Click to expand...
Click to collapse
I'm not sure, have not tried that. I've read others suggesting the same thing but don't know if they've had success with it. I'd bet it wouldn't as there are so many threads, in various model phones, about which rom supports which bands. If that problem could be resolved by simply using the modem partition from a diff rom, it happening would almost certainly be common knowledge and many threads with various modem partitions available, but there aren't.
AsItLies said:
I'm not sure, have not tried that. I've read others suggesting the same thing but don't know if they've had success with it. I'd bet it wouldn't as there are so many threads, in various model phones, about which rom supports which bands. If that problem could be resolved by simply using the modem partition from a diff rom, it happening would almost certainly be common knowledge and many threads with various modem partitions available, but there aren't.
Click to expand...
Click to collapse
Ended up trying it and it prevents boot to system and recovery. I replaced all 4. modemst1,modemst2,modem_a,modem_b
I think we'll have to wait for them to make Q for v405qa unlocked.
I used v405ebw with lineage 18. VoLTE and VoWiFi aren't supported, which basically makes Mint Mobile unusable except for data.
camray00 said:
Ended up trying it and it prevents boot to system and recovery. I replaced all 4. modemst1,modemst2,modem_a,modem_b
I think we'll have to wait for them to make Q for v405qa unlocked.
I used v405ebw with lineage 18. VoLTE and VoWiFi aren't supported, which basically makes Mint Mobile unusable except for data.
Click to expand...
Click to collapse
I'd suggest another option, as 405qa Q arrival is ???, use the korean open 30e. That's what I have. One mod makes it quite workable; copy the US Open /OP partition (from Pie) and use it instead of the KR Open partition. Everything works, including vowifi and volte. And it does get b71. There's only 1 other small change needed to get vowifi to work.
It's very solid and haven't had any trouble with it at all. Something to consider.
I just found out that a great deal of work can be done with Cellular Support via the Qualcomm PDC tool.
AsItLies said:
I'd suggest another option, as 405qa Q arrival is ???, use the korean open 30e. That's what I have. One mod makes it quite workable; copy the US Open /OP partition (from Pie) and use it instead of the KR Open partition. Everything works, including vowifi and volte. And it does get b71. There's only 1 other small change needed to get vowifi to work.
It's very solid and haven't had any trouble with it at all. Something to consider.
Click to expand...
Click to collapse
Can you link the Korean open download? Also, what is the small change for VoWiFi?
Yes it's on this link. It's at the top of the list, the KR Open, 30e is the last one in the beginning section.
The other change is minor, have to enter the service menu with the dial code and it's one of the SVC (iirc) fields you have to enable vowifi. I can find it if you decide to do it.
There's a little 'trick' u need to do when cross flashing, to avoid the 'NT_Error' thing when u first boot up. It doesn't cause a problem, it's just annoying. Just after doing a partition DL of the rom, let it boot of course, to finish. Then shut it off, don't touch anything. Then use LG up and do a refurbish with same rom. No more nt-error code thing.
Also, even though the firmware page (above) doesn't indicate it, that rom does have b71. I have a screen shot of the phone using lte discovery connected to b71 on that rom. It's there.
AsItLies said:
Also, even though the firmware page (above) doesn't indicate it, that rom does have b71. I have a screen shot of the phone using lte discovery connected to b71 on that rom. It's there.
Click to expand...
Click to collapse
I'm trying to boot TWRP. When I run
Code:
fastboot boot judypn_TWRP_bootable-metadata.img
it reads out this:
Code:
downloading 'boot.img'...
OKAY [ 0.942s]
booting...
FAILED (remote: unknown command)
finished. total time: 0.946s
This is after flashing the Korean Open version. I'm not sure what to do. I made sure USB Debugging was on and changed the driver to the official LGE one, but no luck.
I tried everything on google. Still no luck.
camray00 said:
I tried everything on google. Still no luck.
Click to expand...
Click to collapse
Hi, so we've hijacked this thread long enough, let's move this over to this thread which is kor open specific.
Sorry about the hijack xenius.
Please help me. My LG v40ua is switched into los-18.0 and recovery is also los-18.0. Now I want to change back to the previous system, but I can't do it without root. Please tell me what to do, thank you
And my phone can't enter FastBoot mode
xenius9 said:
Initial topic - https://forum.xda-developers.com/lg-v40/development/android-10-0-0-lineageos-17-0-v40-t3970119
So far I am only doing compilation without testing the result.
Download:
LOS-17.1
Latest build: lineage-17.1-20201118-UNOFFICIAL-judypn
https://drive.google.com/drive/folders/1QT_yRNtydEZmplZvl5oSq1xiySv53NK9?usp=sharing
LOS-18.0
Latest build: lineage-18.0-20201126-UNOFFICIAL-judypn
https://drive.google.com/drive/folders/17d7f1QdUoljNnU00VRJYC776KhAwIq4R?usp=sharing
Contributors
xenius9, SGCMarkus
Many thanks to SGCMarkus for the sources.
Click to expand...
Click to collapse
Thank you for your work, @xenius9 - спасибо большое. Using lineage-17.1-20201118-UNOFFICIAL-judypn on Sprint LM-V405UA for about a month without problems.
praiseeee said:
Please help me. My LG v40ua is switched into los-18.0 and recovery is also los-18.0. Now I want to change back to the previous system, but I can't do it without root. Please tell me what to do, thank you
And my phone can't enter FastBoot mode
Click to expand...
Click to collapse
You should get fastboot working via 9008 guide (I suggest not to wipe lafs on both slots), then fastboot TWRP.
praiseeee said:
Please help me. My LG v40ua is switched into los-18.0 and recovery is also los-18.0. Now I want to change back to the previous system, but I can't do it without root. Please tell me what to do, thank you
And my phone can't enter FastBoot mode
Click to expand...
Click to collapse
If you install this apk (only on los), it will allow you to switch to the other side and reboot recovery. It's hard coded (I changed the original file) to boot to recovery after you select the other slot. Did it for the exact situation you're experiencing.
cheers
LOS 17.1 updated
xenius9 said:
LOS 17.1 updated
Click to expand...
Click to collapse
Is it stable? Good for daily driver? Thanks!
Hello forum!
I have LG LM-V405QA and would like to have a ROM flashed that removes all Google everything. I have flashed ROMs in the past, but have already spent too much time researching with no results. I am in California, USA.
This is a serious inquiry. Please help.
Thank you.

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