Develop Bugs

Lg g4 us911 10a (us cellular lg g4) what are my options after root

I got this phone off ebay for a deal 330$. My plan was to root and install an aosp rom.
I have rooted the phone but cannot find anyway to install twrp. Seems like all the twrp recoveries and custom roms are for tmobile and international versions
i was not aware when i bought this phone that it would be a us cellular version the ad did not say
anyways what are my options? Is it possible to get an aosp rom on this version of the phone any advice would greatly be
appreciated

Unfortunately there are no options as of now. The bootloader is locked and there hasn't been a workaround discovered for it yet like for other devices.
At best you can root and flash xposed on the phone as long as it has Lollipop, but as it looks now, you won't be able to keep root if you upgrade to Marshmallow.

billybob275 said:
Unfortunately there are no options as of now. The bootloader is locked and there hasn't been a workaround discovered for it yet like for other devices.
At best you can root and flash xposed on the phone as long as it has Lollipop, but as it looks now, you won't be able to keep root if you upgrade to Marshmallow.
Click to expand...
Click to collapse
thanks for the reply, i can stop searching like a fool lol
will i even get the marshmallow update, i have a us cellular version running on att network

The US Cellular model will most likely get MM soon, but if you're on the AT&T network, you won't get the OTA. I'm not sure if you would have to put a US Cellular SIM back in temporarily to get the OTA download, or if you could just remove the AT&T SIM and download it over WiFi. Otherwise, you could just get the kdz when it comes out, plug into your computer and force the update that way.

billybob275 said:
The US Cellular model will most likely get MM soon, but if you're on the AT&T network, you won't get the OTA. I'm not sure if you would have to put a US Cellular SIM back in temporarily to get the OTA download, or if you could just remove the AT&T SIM and download it over WiFi. Otherwise, you could just get the kdz when it comes out, plug into your computer and force the update that way.
Click to expand...
Click to collapse
yah but even with the mm kdz file comes out it will be for us cellular and the phone will become carrier locked and i will have to go thru the hassle if getting unlocked. btw my firmware version is us99110a i bought it off ebay. the seller did not specify it was under any network just said network unlocked. but like i said my firmmware version is us99110a which i believe is a us cellular firmware

US991 Marshmellow
Hi Guys,
I am having a real issue here after reading this tread. I recently upgraded to marshmellow but my data stopped working. I cannot get the H+ anymore. I need to go back to lillipop. I am looking all over the internet trying to find out how i can roll back. i even factory reset the phone but is goes back to marshmellow. do you have a clue how i can do it?
I asked around and they directed me to http://forum.xda-developers.com/g4/help/lgup-install-kdz-mm-lp-t3249803
My software version is US99120c.

Can I get help rooting the 10a? Every tutorial I see is 10c and I can''t update mine.

How can I update firmware?

Hello,
I live in Korea and not an AT&T carrier user. So, I have never received AT&T's OTA.
I tried to connect my Galaxy S7 Active to Samsung Smart Switch, but Samsung Smart Switch says my phone's firmware is the newest version.
My phone's baseband version is G891AUCU1APE7, and build number is MMB29M.G891AUCU1APE7.
Am I unable to update my phone forever?
I want to update my phone's firmware.
I desperately need your help...
Thank you.

ATT only updates there phones OTA... you have to be on the att network to get it to update.

johnson79 said:
Hello,
I live in Korea and not an AT&T carrier user. So, I have never received AT&T's OTA.
I tried to connect my Galaxy S7 Active to Samsung Smart Switch, but Samsung Smart Switch says my phone's firmware is the newest version.
My phone's baseband version is G891AUCU1APE7, and build number is MMB29M.G891AUCU1APE7.
Am I unable to update my phone forever?
I want to update my phone's firmware.
I desperately need your help...
Thank you.
Click to expand...
Click to collapse
+1 Not AT&T Carrier
But I see S6 Active can in PC updata I think can use the same method to upgrade

qbcgraphics said:
ATT only updates there phones OTA... you have to be on the att network to get it to update.
Click to expand...
Click to collapse
Given that they allow unlocking of the device, that is a ridiculous policy. I can only hope that someone will be able to download the image so that we can use odin.

looking on the S6 Active thread, they find the update downloads on AT&T site, not sure how ?? you can easily find out WHAT update is the newest ..
then either flash via Odin, or 'side' load it ...
but i couldnt find out how they were getting the links from AT&T site to download direct ..

Updating outside USA
in order to update this device outside of USA you should get a At&t SIM card (whit active account), put and seek for updates and will work, I made it a couple of hours and I was able to update.....All this thanks to a friend who lives in Usa and came to visit my country and lend his sim card to do the test ...

Do AT&T have such things as pre-paid sim cards? And could I activate one outside of the USA?

bandario said:
Do AT&T have such things as pre-paid sim cards? And could I activate one outside of the USA?
Click to expand...
Click to collapse
It exists and is called GoPhone, only you would have to do it through some friend or trustworthy person who lives in the USA and can buy it and send it to your country ... is what I will do for the next updates

(Was a scam site, sorry)

now we have these phones rooted, could people in the US with a OTA updates, pull /dump the updates
for us people outside US to flash via Odin ? ...

I'm looking into purchasing this device but have second thoughts due to firmware update availability (not to mention custom ROM support).
Anyway, related to the topic above, I have an AT&T prepaid GO Phone SIM but it is already deactivated/expired. Can I use this old prepaid SIM to update the device firmware outside US?
Side question, what is the difference between SM-G891 and SM-G891A? I see it often when looking for this device.
Thanks.

johnson79 said:
Hello,
I live in Korea and not an AT&T carrier user. So, I have never received AT&T's OTA.
I tried to connect my Galaxy S7 Active to Samsung Smart Switch, but Samsung Smart Switch says my phone's firmware is the newest version.
My phone's baseband version is G891AUCU1APE7, and build number is MMB29M.G891AUCU1APE7.
Am I unable to update my phone forever?
I want to update my phone's firmware.
I desperately need your help...
Thank you.
Click to expand...
Click to collapse
Kindly check this link sep 2016 update
http://samfirm.net/threads/official...1aucs2api2-att-android-6-0-1-marshmallow.127/

http://samfirm.net/threads/official...1aucs2api2-att-android-6-0-1-marshmallow.127/

Hi aalam .. did you face any issues with update using Odin .. I want to update my device but I'm afraid that I might brick it in the process .. this is not the first time that I update a device using Odin but normally it's just one file and I never needed to use the pit file.
appreciate if you can tell me the status of the device after the update ..

killerbuzz said:
Hi aalam .. did you face any issues with update using Odin .. I want to update my device but I'm afraid that I might brick it in the process .. this is not the first time that I update a device using Odin but normally it's just one file and I never needed to use the pit file.
appreciate if you can tell me the status of the device after the update ..
Click to expand...
Click to collapse
did you update your device

yes I did .. and it works fine .. thanks aalamxed

Latest Software for -G710ULM?

Hello, I just bought a G710ULM off the bay and verified the model before purchase. I received it and the software verifies it's a G710ULM but a IMEI check shows it's a PM (Sprint). So the software is still on V10b with no updates coming. I'm thinking this is because the update checks the IMEI and sees it as a Sprint device even though the software says G710ULM. I see a version on LG's site for 11e, is that the latest version? Trying to figure out if I'd been duped. The seller is a MAJOR seller and I'm thinking they are getting these as new Sprint units and LG or someone is reflashing them. I might be all wrong but 2 different IMEI checkers say it's a Sprint.

rzracer2 said:
Hello, I just bought a G710ULM off the bay and verified the model before purchase. I received it and the software verifies it's a G710ULM but a IMEI check shows it's a PM (Sprint). So the software is still on V10b with no updates coming. I'm thinking this is because the update checks the IMEI and sees it as a Sprint device even though the software says G710ULM. I see a version on LG's site for 11e, is that the latest version? Trying to figure out if I'd been duped. The seller is a MAJOR seller and I'm thinking they are getting these as new Sprint units and LG or someone is reflashing them. I might be all wrong but 2 different IMEI checkers say it's a Sprint.
Click to expand...
Click to collapse
G710ULM owner here on Project Fi, the latest version is M10g. Updated to it about a week ago. Your phone may just need some time, or you can try using the LG Bridge software on a computer to update the phone over USB. Otherwise, it may just be a carrier thing.

I tried Bridge but when I check for update it gives an error. Wondering, when you check you IMEI does it show up as a G710ULM ? thank you

I got the same problem, got it on ebay, In settings the model is G710ULM, but the real model is G710PM. I also try updating via LGBRIDGE i aslo get the same error. Trying to get a KDZ file but i just cant find one and i don't know if putting another region firmware would work. There's a youtuber that had sprint LG G6 and just changed the Firmware (used one from canada, it work and also UNLOCKED all bands for world wide use).

Same ebay phone Same issue here with no s/n showing hardware is fine unlocked running tmobile usa.. Signal seems bad. Never see 4glte icon only 4g , H, G. Hopefully we can flash to some other firmware to get lastest update.Right now running v10b-Lao-COM firmware i guess thats sprint rom
Sent from my LM-G710 using Tapatalk

I did flash mine, had the ULM software with SECURITY PATCH MAY.... What i did is download ULM 10g file from website, used LG-UP to flash it, But first you have to create a DLL file for LG-UP for this to work, if not you going to a error on LG-UP when you hit START.

Radha09 said:
I did flash mine, had the ULM software with SECURITY PATCH MAY.... What i did is download ULM 10g file from website, used LG-UP to flash it, But first you have to create a DLL file for LG-UP for this to work, if not you going to a error on LG-UP when you hit START.
Click to expand...
Click to collapse
Nice! So the phone still unlocked and has latest sprint firmware? or G710ulm firmware 10g? I guess is this one
https://www.getdroidtips.com/g710ulm10g-software-update-lg-g7-thinq/ " ) Currently on my G7 runing V10b-LAO-COM already list as MAY 1 2018 Android Security Patch, do u have any detail steps post somewhere? Thanks .

jonahy said:
Nice! So the phone still unlocked and has latest sprint firmware? or G710ulm firmware 10g? I guess is this one
https://www.getdroidtips.com/g710ulm10g-software-update-lg-g7-thinq/ " ) Currently on my G7 runing V10b-LAO-COM already list as MAY 1 2018 Android Security Patch, do u have any detail steps post somewhere? Thanks .
Click to expand...
Click to collapse
Yes, the G710ULM firmware 10g that's the project FI(I used another link, not the same you posted, but it should work). I was running the same firmware V10b-LAO-COM, The project FI, was the only one I could find (ULM), so that's why I decided to use that one and because I read on Google that those phones are unlocked. I don't have the steps, but I could make a post in a few hours. And also it's still unlocked, using it outside the US. (I got this one on eBay unlocked version, but it's Sprint).

Does it work with Sprint now? I have the same story - bought "unlocked" g7 on eBay, shows G710ULM in settings but IMEI shows as Sprint phone.. Was working on Tmobile but when I activated with Sprint it doesn't read the SIM.

justanyone said:
Does it work with Sprint now? I have the same story - bought "unlocked" g7 on eBay, shows G710ULM in settings but IMEI shows as Sprint phone.. Was working on Tmobile but when I activated with Sprint it doesn't read the SIM.
Click to expand...
Click to collapse
Yes, it's working.

Radha09 said:
Yes, it's working.
Click to expand...
Click to collapse
Thanks so much for confirming. Now I have to decide if I should risk this to get it working or just return..

justanyone said:
Thanks so much for confirming. Now I have to decide if I should risk this to get it working or just return..
Click to expand...
Click to collapse
Well I think it really depends on you, maybe you should return de device, if Sprint doesn't work.... On eBay it said "UNLOCKED". So if it does not work just return it... I am using the phone outside the US.

rzracer2 said:
I tried Bridge but when I check for update it gives an error. Wondering, when you check you IMEI does it show up as a G710ULM ? thank you
Click to expand...
Click to collapse
Sprint devices support FOTA Update only!
LG bridge does not support Software Update for Sprint devices
---------- Post added at 09:41 AM ---------- Previous post was at 09:37 AM ----------
LG G7 thinQ Project Fi firmware
https://www.mylgphones.com/lg-g7-thinq-project-fi-stock-firmware-g710ulm10g.html

Radha09 said:
Yes, the G710ULM firmware 10g that's the project FI(I used another link, not the same you posted, but it should work). I was running the same firmware V10b-LAO-COM, The project FI, was the only one I could find (ULM), so that's why I decided to use that one and because I read on Google that those phones are unlocked. I don't have the steps, but I could make a post in a few hours. And also it's still unlocked, using it outside the US. (I got this one on eBay unlocked version, but it's Sprint).
Click to expand...
Click to collapse
does Gpay Works on Ur ULM ?

Does this also unlock the APN settings? G710pm, gsm carrier unlocked, but does not allow APN to be changed.

Radha09 said:
Yes, the G710ULM firmware 10g that's the project FI(I used another link, not the same you posted, but it should work). I was running the same firmware V10b-LAO-COM, The project FI, was the only one I could find (ULM), so that's why I decided to use that one and because I read on Google that those phones are unlocked. I don't have the steps, but I could make a post in a few hours. And also it's still unlocked, using it outside the US. (I got this one on eBay unlocked version, but it's Sprint).
Click to expand...
Click to collapse
Did you manage to make a detailed post regarding the steps to do this ? or if you can point me to one.
Thanks.

i downloaded the latest LM-G710ULM pie kdz and it has worked perfectly with the sprint thinq

Apologies for replying to an old thread, but I have one of these modded sprint g7 that shows G710ULM.
Could someone be able to be kind enough to list out the steps used to manually upgrade the stock android 8 up to android 9 please?

guitar_pic said:
Apologies for replying to an old thread, but I have one of these modded sprint g7 that shows G710ULM.
Could someone be able to be kind enough to list out the steps used to manually upgrade the stock android 8 up to android 9 please?
Click to expand...
Click to collapse
https://forum.xda-developers.com/showpost.php?p=81131579&postcount=247

Wifi on lg g7
Anyone have problem with wifi on lg g7 yet???? My phone of sprint , g710ulm21e alway disconnect and reconnect . Some one can help me. When i play game , wifi is no problem. So crazy

AT&T LG G8 - Want to flash stock firmware, possible?

AT&T LG G8 - Want to flash stock firmware, possible? Trying to use it on Google FI and it seems hotpot and many other features aren't working. Phione is paid in full and unlocked. Factory firmware currently.

I want to flash my phone

So you're trying to flash stock on top of stock?

The request is to see if you can flash a bare LG unlocked ROM that comes with factory unlocked phones onto a phone that came with a stock AT&T ROM. The Att phone has now been carrier unlocked, is used on a different network, so the Att specific apps that replaced stock apps no longer work.
I was also wondering if I could do this with my Tmobile G8; unlock the phone, then flash the unlocked LG OS instead of the Tmobile version. My goal is debloat, and to be able to have the original Android hotspot app. Not to mention get rid of that terrible pink, loud, annoying carrier startup splash.
Also, I wonder if security updates would come faster when strait from LG instead of the carrier.

DrivenKeys said:
The request is to see if you can flash a bare LG unlocked ROM that comes with factory unlocked phones onto a phone that came with a stock AT&T ROM. The Att phone has now been carrier unlocked, is used on a different network, so the Att specific apps that replaced stock apps no longer work.
I was also wondering if I could do this with my Tmobile G8; unlock the phone, then flash the unlocked LG OS instead of the Tmobile version. My goal is debloat, and to be able to have the original Android hotspot app. Not to mention get rid of that terrible pink, loud, annoying carrier startup splash.
Also, I wonder if security updates would come faster when strait from LG instead of the carrier.
Click to expand...
Click to collapse
Let me know if you find a debloated is for a T-Mobile g8

Has anyone figured out any method that actually works for just flashing firmware to the g8?

Unlike Samsung phones where you can flash other firmwares via ODIN I don't think this phone has that ability. If you got to the ROM/Development section there are threads where people posted firmwares but no instructions on how to flash.

SantinoInc said:
Unlike Samsung phones where you can flash other firmwares via ODIN I don't think this phone has that ability. If you got to the ROM/Development section there are threads where people posted firmwares but no instructions on how to flash.
Click to expand...
Click to collapse
We can actually cross flash, but we need a modified lg dll to fool lgup into letting us flash any firmware.

I have tried just about everything I can think of to get this thing to flash. I saw some people using lgup v1.15 via the command line but that didn't work either.

cas8180 said:
I have tried just about everything I can think of to get this thing to flash. I saw some people using lgup v1.15 via the command line but that didn't work either.
Click to expand...
Click to collapse
I am trying to do the same. I have a sprint version of the g8 thinq which i would like to install the unlocked version of the firmware. Any way to do so?

I have 2 unlocked sprint lg g8. One of them doesn't have the Sprint splash screens. So somebody was able to do something.

DrivenKeys said:
The request is to see if you can flash a bare LG unlocked ROM that comes with factory unlocked phones onto a phone that came with a stock AT&T ROM. The Att phone has now been carrier unlocked, is used on a different network, so the Att specific apps that replaced stock apps no longer work.
I was also wondering if I could do this with my Tmobile G8; unlock the phone, then flash the unlocked LG OS instead of the Tmobile version. My goal is debloat, and to be able to have the original Android hotspot app. Not to mention get rid of that terrible pink, loud, annoying carrier startup splash.
Also, I wonder if security updates would come faster when strait from LG instead of the carrier.
Click to expand...
Click to collapse
Hello,
I've tried to flash another firmware on an AT&T LM-G820UM10i with LGUP and a firmware found on lg-firmware.
The LGUP restarted the phone in Firmware update mode, then on LGUP, I got an error
Error 0x5319, Not allow to change the device.(ATT_US->OPEN_CA)
So I've unplugged and reboot the phone. Still working.

asaural said:
Hello,
I've tried to flash another firmware on an AT&T LM-G820UM10i with LGUP and a firmware found on lg-firmware.
The LGUP restarted the phone in Firmware update mode, then on LGUP, I got an error
Error 0x5319, Not allow to change the device.(ATT_US->OPEN_CA)
So I've unplugged and reboot the phone. Still working.
Click to expand...
Click to collapse
Lg Blocked crossflashing , its not possible as of this moment.

siulmagic said:
We can actually cross flash, but we need a modified lg dll to fool lgup into letting us flash any firmware.
Click to expand...
Click to collapse
go ahead and make the very first ever how to tutorial and get all the glory

rldev said:
I have 2 unlocked sprint lg g8. One of them doesn't have the Sprint splash screens. So somebody was able to do something.
Click to expand...
Click to collapse
that just means one of the unit was not activated on Sprint (usually once activated Chameleon then kicks in and adds all the sprint stuff or boost depending on the MVNO)

I have all the necessary data and the LG DLL in the LGUP folder to put any ROM released, I have an LG G8 from AT&T, I am not within the United States but I am afraid that by modifying the ROM (KDZ) they will not work for me some things like 4G or some functions inside the phone, to specify live in Latin America, if someone helps me pass the LGUP data through Google Drive

MrFulgore said:
I have all the necessary data and the LG DLL in the LGUP folder to put any ROM released, I have an LG G8 from AT&T, I am not within the United States but I am afraid that by modifying the ROM (KDZ) they will not work for me some things like 4G or some functions inside the phone, to specify live in Latin America, if someone helps me pass the LGUP data through Google Drive
Click to expand...
Click to collapse
You can't cross flash

WHY? The hardware comes with ****ty bloated software, which I did not pay for and want off the ****ing device

q-killer said:
WHY? The hardware comes with ****ty bloated software, which I did not pay for and want off the ****ing device
Click to expand...
Click to collapse
Because the G8 and all newer LG phones have security measures to prevent cross flashing.
Many bloatware apps can be Disabled in App Info Settings. The rest can be removed with ADB shell "pm uninstall". Google it.
It's best to never ever buy carrier devices. There's a reason they're the ones sold with a discount :cyclops:

TheDannemand said:
Because the G8 and all newer LG phones have security measures to prevent cross flashing.
Many bloatware apps can be Disabled in App Info Settings. The rest can be removed with ADB shell "pm uninstall". Google it.
It's best to never ever buy carrier devices. There's a reason they're the ones sold with a discount :cyclops:
Click to expand...
Click to collapse
The Sprint LG g8 is recognized by lgup when it's on leaked beta. It's possible they haven't built in security measures yet, I'm going to try cross flashing

Need Android Pie firmware details for Unlocked T-Mobile Samsung S9

Hi All,
I have Samsung S9 Unlocked T-mobile from US and currently in India. Currently i have Oreo Version.
As all know, it doesnt have VOLTE option enabled which is needed for my sim network for voice calls to go through.
Somewhere i read Pie update will have VOLTE option and hence i am trying to update to Pie update.
I downloaded G960USQS6CSGB firmware for T-mobile, but before upating firmware using Odin, i got doubt if it will stick to T Mobile after update. This will make my phone not usable in India.
I tried to check online, but couldnt get direct answer and hence posting in new thread.
Can someone help clarify if it will lock the mobile to T-Mobile or will the phone be still in unlocked state?
Also i see two CSC files in the firmware folder. CSC and HOME_CSC. Which one to use?
If I should update with some other firmware for being unlocked and yet to get PIE update, please point to required firmware name or links.
Also will updating to PIE update will have VOLTE option ? Kindly confirm.
Thanks in Advance.

abalanag said:
Hi All,
I have Samsung S9 Unlocked T-mobile from US and currently in India. Currently i have Oreo Version.
As all know, it doesnt have VOLTE option enabled which is needed for my sim network for voice calls to go through.
Somewhere i read Pie update will have VOLTE option and hence i am trying to update to Pie update.
I downloaded G960USQS6CSGB firmware for T-mobile, but before upating firmware using Odin, i got doubt if it will stick to T Mobile after update. This will make my phone not usable in India.
I tried to check online, but couldnt get direct answer and hence posting in new thread.
Can someone help clarify if it will lock the mobile to T-Mobile or will the phone be still in unlocked state?
Also i see two CSC files in the firmware folder. CSC and HOME_CSC. Which one to use?
If I should update with some other firmware for being unlocked and yet to get PIE update, please point to required firmware name or links.
Also will updating to PIE update will have VOLTE option ? Kindly confirm.
Thanks in Advance.
Click to expand...
Click to collapse
csc will factory reset your phone, home_csc wont
volte wasnt removed from pie, so that shouldnt be an issue
the firmware version you posted has the 6th bootloader revision, im betting here is a 7th available for your phone, but the 6th version should be fine as well
as far as the unlocked state of the phone goes, it shouldnt re-lock, but im paranoid lol. Have you looked into the U1 versions of the phones firmware? Theyre inherently unlocked firmwares and dont have any of that irritating bloatware **** in them

youdoofus said:
csc will factory reset your phone, home_csc wont
volte wasnt removed from pie, so that shouldnt be an issue
the firmware version you posted has the 6th bootloader revision, im betting here is a 7th available for your phone, but the 6th version should be fine as well
as far as the unlocked state of the phone goes, it shouldnt re-lock, but im paranoid lol. Have you looked into the U1 versions of the phones firmware? Theyre inherently unlocked firmwares and dont have any of that irritating bloatware **** in them
Click to expand...
Click to collapse
Thanks youdoofus the inputs. Say by chance if it gets locked, is there a way to unlock the phone again from here?
may be then i will try to load U1 versions otherwise. Thanks alot.

abalanag said:
Thanks youdoofus the inputs. Say by chance if it gets locked, is there a way to unlock the phone again from here?
may be then i will try to load U1 versions otherwise. Thanks alot.
Click to expand...
Click to collapse
if it has no financial obligation to any carrier and the phone locks to that carrier, then the carrier it locked to would be required to release it. I cant imagine how it would lock to t-mob tho

Factory unlocked phones stay unlocked, no matter what firmware you flash.
Carrier locked phones that were properly unlocked by the carrier (they provide the code to SIM unlock the phone) will stay unlocked, again, no matter what firmware you flash to it - as long as it's compatible. Flashing the wrong firmware may just brick the phone. But, at least it's still SIM unlocked.
Phones that had some kind of software hack installed to trick the phone into thinking it's unlocked will lose the unlock status when you flash a firmware that also wipes the phone. Then it will come back as carrier locked again, because the hack is gone.
That last case is the only case I know of that will "re-lock" a phone. I've never heard of a carrier unlocked phone spontaneously re-locking under any circumstance.

Hi,
Thanks for the details. I tried to flash G960U1UES6CSG4_G960U1OYM6CSG4_XAA firmware. But while loading AP file in ODIN, it gave some error. Couldnt understand what is the error as its in chinese.
Then i loaded G960USQS6CSGB_G960UOYN6CSGB_TMB firmware which i downloaded previously. This got loaded in ODIN without any issues. And i am able to flash to phone. On rebooting, saw that phone moved to Pie version.
But i couldnt find VOLTE option (Enhanced calling) option. Does anyone know which version will enable that option?
Or anyother way to enable that please.
Thanks in advance.

joeldf said:
Factory unlocked phones stay unlocked, no matter what firmware you flash.
Carrier locked phones that were properly unlocked by the carrier (they provide the code to SIM unlock the phone) will stay unlocked, again, no matter what firmware you flash to it - as long as it's compatible. Flashing the wrong firmware may just brick the phone. But, at least it's still SIM unlocked.
Phones that had some kind of software hack installed to trick the phone into thinking it's unlocked will lose the unlock status when you flash a firmware that also wipes the phone. Then it will come back as carrier locked again, because the hack is gone.
That last case is the only case I know of that will "re-lock" a phone. I've never heard of a carrier unlocked phone spontaneously re-locking under any circumstance.
Click to expand...
Click to collapse
another user just posted up in another thread that they had a factory cricket phone that got unlocked, he put an at&t sim in it and it installed at&t apps and locked the phone to at&t FWIW
---------- Post added at 02:42 PM ---------- Previous post was at 02:36 PM ----------
abalanag said:
Hi,
Thanks for the details. I tried to flash G960U1UES6CSG4_G960U1OYM6CSG4_XAA firmware. But while loading AP file in ODIN, it gave some error. Couldnt understand what is the error as its in chinese.
Then i loaded G960USQS6CSGB_G960UOYN6CSGB_TMB firmware which i downloaded previously. This got loaded in ODIN without any issues. And i am able to flash to phone. On rebooting, saw that phone moved to Pie version.
But i couldnt find VOLTE option (Enhanced calling) option. Does anyone know which version will enable that option?
Or anyother way to enable that please.
Thanks in advance.
Click to expand...
Click to collapse
if your Odin error messages are in Chinese, youve obtained a modified version. Itll probably work, but youll get that Chinese stuff whenever it needs to tell you anything. I dont know which versions have volte tbh. Sorry man.

youdoofus said:
another user just posted up in another thread that they had a factory cricket phone that got unlocked, he put an at&t sim in it and it installed at&t apps and locked the phone to at&t FWIW
---------- Post added at 02:42 PM ---------- Previous post was at 02:36 PM ----------
if your Odin error messages are in Chinese, youve obtained a modified version. Itll probably work, but youll get that Chinese stuff whenever it needs to tell you anything. I dont know which versions have volte tbh. Sorry man.
Click to expand...
Click to collapse
Thanks youdoofus for trying to help. For me atleast it didnt get locked when i moved to Pie. I will try other methods.
I will try to root the phone for enabling volte, but the methods that i tried didnt work.

youdoofus said:
another user just posted up in another thread that they had a factory cricket phone that got unlocked, he put an at&t sim in it and it installed at&t apps and locked the phone to at&t FWIW
Click to expand...
Click to collapse
That's just weird.

joeldf said:
That's just weird.
Click to expand...
Click to collapse
yeah, sort of. The CSC's on these things are weird. Im starting to believe that these new versions of android are just like windows ISOs where they have all the versions compressed into one file and it uses a directory file to tell the firmware which version to install. Im sure a code writing dev can confirm or deny this thought, but at this point its merely a weak theory

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product.name : starqltesq
Time Used: 2.00 s