Develop Bugs

Replacing Firmware

i have 1903 unrooted variant with oxygen 10.0.7HD65AA firmware. How can i replace it with european 10.0.7HD65BA firmware?

Download the full version of rom and then use the local upgrade feature. Please take backup.

elanandkumar said:
Download the full version of rom and then use the local upgrade feature. Please take backup.
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i did it and it said that the firmware i have (10.0.7 global) is newer and that downgrade is not allowed

You will need to wait till next update and flash a newer rom I'm affraid.

You could wipe everything in recovery and then use the relevant fastboot rom to go to the BA version. I did that and went from AA to BA version on 1903.

altojd said:
i did it and it said that the firmware i have (10.0.7 global) is newer and that downgrade is not allowed
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Just unlock your device and use the fastboot rom. Enjoy your freedom

I bought Oneplus 7T on gerabest and it's Chinese 1900 variant. Is it possible to convert it to 1930?

adam_pl said:
I bought Oneplus 7T on gerabest and it's Chinese 1900 variant. Is it possible to convert it to 1930?
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Not sure..
I think that there may be some small hardware differences?
Read all the relevant threads first.
If it's the same hardware then you should be able to wipe in recovery and then use the relevant fastboot rom.

mikefnz said:
You could wipe everything in recovery and then use the relevant fastboot rom to go to the BA version. I did that and went from AA to BA version on 1903.
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how did u flash the rom with fastboot? do u have to extract it first or can it be flashed from zip?

altojd said:
how did u flash the rom with fastboot? do u have to extract it first or can it be flashed from zip?
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https://forum.xda-developers.com/oneplus-7t/how-to/rom-stock-fastboot-roms-oneplus-7t-t3979213

Question Can I flash modem.bin via Twrp/without laptop

Hey looks like all weapons are available for OnePlus 9 pro(root, magisk, Twrp), I have a T-Mobile version but converted to EU, Only step I cannot do on my phone is to flash modem after OTA, just wondering can we do that via Twrp/without laptop?

Why are you trying to flash the modem?

tech_head said:
Why are you trying to flash the modem?
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For conversation from t mobile to EU, you need to flash modem after OTA otherwise you will not get service

Flashing the modem is necessary to regain data since EU uses an incompatible modem that does not work with TMO.
Regarding flashing the modem, it could be done but as TWRP is kind of buggy, I don't think this is a good idea. It only really accepts .img and .zip files anyway. So to answer your question, no.
EDIT: I take that back, you could use the terminal and just dd the modem.bin to the modem partition.

razercortex said:
Flashing the modem is necessary to regain data since EU uses an incompatible modem that does not work with TMO.
Regarding flashing the modem, it could be done but as TWRP is kind of buggy, I don't think this is a good idea. It only really accepts .img and .zip files anyway. So to answer your question, no.
EDIT: I take that back, you could use the terminal and just dd the modem.bin to the modem partition.
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Ah nice, can you elaborate how to do it via terminal?

It probably goes something like this:
dd if=/sdcard/Download/modem.bin of=/dev/block/bootdevice/by-name/modem

Not sure about T-Mobile but when flashing EU firmware for the Global/US model there is no need to do anything but flash the firmware itself. I'm running BA and have not flashed the modem. The same applies for my 7 Pro when I ran EU firmware.
Have you actually tried to get service?

tech_head said:
Not sure about T-Mobile but when flashing EU firmware for the Global/US model there is no need to do anything but flash the firmware itself. I'm running BA and have not flashed the modem. The same applies for my 7 Pro when I ran EU firmware.
Have you actually tried to get service?
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T-Mobile has a different baseband, and thus is needed. Your 2125 does not have the same issue so you don't need to. Why would you think people haven't tried to get service w/o a modem flash??

I've done 2 OTA updates on my Tmobile 9 pro that is running the EU firmware and have not had to flash the modem.

craznazn said:
T-Mobile has a different baseband, and thus is needed. Your 2125 does not have the same issue so you don't need to. Why would you think people haven't tried to get service w/o a modem flash??
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Just asking

sultan.of.swing said:
I've done 2 OTA updates on my Tmobile 9 pro that is running the EU firmware and have not had to flash the modem.
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Did you use the msm tool that doesn't require an unlocked bootloader? If you used this conversion method then you absolutely need to flash modem. It says so right in the op of the TMobile msm to EU thread. Also I've updated twice after using that method and absolutely had to flash TMobile modem to a and b partitions in order to have data.

Was wondering if we could get a flash able zip for this as well. Would make life so much easier then I won't need a computer to flash my roms anymore lbs

Just follow my guide
[TMO] 9 PRO MODEM RETENTION/DATA FIX
----- With the release of OOS13, the modem issue no longer exist. Thank you all for the support & help with this unfortunate issue, we had to endure.... ----- EXPLICITLY FOR TMOBILE 9 PRO (I'm not responsible for your failure to read or...
forum.xda-developers.com

Question T-Mobile updated modem.

Hello, if anyone is on the latest rooted T-Mobile firmware, could you please pull the modem_a/modem_b and modemst1/modemst2 img files and upload them please? I'm converted and I'm using the 11.2.5.5 T-Mobile modem. I wanna see if there's any noticeable difference in coverage/speed with 11.2.5.5 vs latest T-Mobile firmware modems. Thanks in advance.

[TMO] 9 PRO MODEM RETENTION/DATA FIX
----- With the release of OOS13, the modem issue no longer exist. Thank you all for the support & help with this unfortunate issue, we had to endure.... ----- EXPLICITLY FOR TMOBILE 9 PRO (I'm not responsible for your failure to read or...
forum.xda-developers.com

what exactly do u mean? What I do is everytime T-mobile updates, I get new modem and flash on Global... I'll be doing so for every update, where I provide zips and images in thread shared above.

Awesome thread. Thanks for chiming in on this. I thought I was in the wrong by posting this cause of your thread but to clarify what I meant was: the latest T-Mobile firmware is 11.2.4.4. My backup from before I converted was based off of 2.2 or 2.3 I believe. If someone had a firmware newer than 3.3, I was wondering if it was better or the same. Sorry for any confusion.

I guess I could always pull the modem files from a t-mobile ota but I don't think there's any full zips floating around since t-mobile is technically AA, AA otas are pushed from Google's servers and they're only incremental. Not sure if incrementals have the modem files or not.

TheKnux said:
I guess I could always pull the modem files from a t-mobile ota but I don't think there's any full zips floating around since t-mobile is technically AA, AA otas are pushed from Google's servers and they're only incremental. Not sure if incrementals have the modem files or not.
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nope but you could use nebrassy's unofficial twrp to backup modem while on TmobileOS, then restore while on OOS or Custom rom .
Yes clear difference after updating, especially quality & reliability via roaming..

Libra420T said:
nope but you could use nebrassy's unofficial twrp to backup modem while on TmobileOS, then restore while on OOS or Custom rom .
Yes clear difference after updating, especially quality & reliability via roaming..
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Yeah I'm not gonna do all that. Unless I necessarily have to revert using MSM, I'll just stick with my modem backup. When the time comes to MSM, I'll backup the most recent modem.

@Libra420T i was able to pull the modem files from 11.2.5.5 T-Mobile firmware if you'd like to add them to your post.

TheKnux said:
@Libra420T i was able to pull the modem files from 11.2.5.5 T-Mobile firmware if you'd like to add them to your post.
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most appreciated

Here is the link to the T-Mobile 11.2.5.5 firmware modem images if anyone is interested.
Modem_a/_b are fastboot flashable.
Fastboot flash modem_a modem_a.img
Fastboot flash modem_b modem_b.img
Fastboot reboot
These can also be replaced in payload.bin firmware fastboot roms. Just extract via payload dumper, place these modem files into the rom, then fastboot flashall in fastbootd.

DO NOT FLASH modemst1 or modemst2.
Thanks @craznazn. Will delete files from folder so the modem_a and modem_b are the only two files in there. Also, these are the modems from the Pro variant. OOS 11.2.5.5. T-Mobile firmware.
Edit: files removed.

so I flashed the modems and all I gotta say holy cow

Where is the file?

grinch247 said:
Where is the file?
Click to expand...
Click to collapse
[TMO] 9 PRO MODEM RETENTION/DATA FIX
----- With the release of OOS13, the modem issue no longer exist. Thank you all for the support & help with this unfortunate issue, we had to endure.... ----- EXPLICITLY FOR TMOBILE 9 PRO (I'm not responsible for your failure to read or...
forum.xda-developers.com

I see 11.2.3.3

Is there a 5.5 modem download? And can I flash it in twrp?

Alton (Halo 2) said:
Is there a 5.5 modem download? And can I flash it in twrp?
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Click to collapse
yes we be uploaded within the week. And no, flash in bootloader (follow guide).

How To Guide [TMO] OOS/COS DATA FIX

TO CLARIFY THIS IS A ROOT ONLY FIX​​After gaining root install given module.
Data is now retained. Even after reboot(s).
No empty slot or waiting.
Issue is TMO variant is showing multi sim.
So props were added to make it like a conversion to single sim....
Yes module works for both models.
Install & enjoy
Extract and pull it apart if interested .
Please give amazing thanks
to @twinnfamous for building module & bringing this data/sim nightmare to an end ​

Hi,
This is working great, I have flashed and rebooted multiple times with no signal loss, great work, thanks for this.
Now that Tmo has a new update out, will this need to be flash when I update to the new Tmo modem?

kelvin216 said:
Hi,
This is working great, I have flashed and rebooted multiple times with no signal loss, great work, thanks for this.
Now that Tmo has a new update out, will this need to be flash when I update to the new Tmo modem?
Click to expand...
Click to collapse
I guarantee 9.9 is not the fix
Yes, will have to, until Tmo A12 hopefully fixes it. But don't get your hopes up

I was able to successfully keep 5g mobile data on Android 12 using your module.
Thanks a ton.
I had also followed the other guide for data retention and that works great until the ob1 is installed, then your tool was needed to bring the modem back that was retained by his process.
But after combining the two guides and being successful so far, do you think I'd be able to take the latest c44 update, reflash your module and have my 5g return? Or are the stables garunteed to break it.?

After updating c44 via update, then installing module data_fix? Should be fine. Honestly prop is so simple it should always work

Libra420T said:
After updating c44 via update, then installing module data_fix? Should be fine. Honestly prop is so simple it should always work
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Click to collapse
damn updated to c44 and flashed your fix, but it only gave me 4g, and h+.
Flashing the global variant for 2125 fixed the issue

jruizdesign said:
damn updated to c44 and flashed your fix, but it only gave me 4g, and h+.
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Click to collapse
Check Network settings
And check phone info using dialer command and switch "preferred networks" see if that helps. Otherwise should be no issue ...
*#*#4636#*#*

Libra420T said:
Check Network settings
And check phone info using dialer command and switch "preferred networks" see if that helps. Otherwise should be no issue ...
*#*#4636#*#*
Click to expand...
Click to collapse
That dialer code doesn't work on a12 , preferred networks doesn't even show 5g or lte, just 2/3/4g/

jruizdesign said:
That dialer code doesn't work on a12 , preferred networks doesn't even show 5g or lte, just 2/3/4g/
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Are u on color os or oxygen os and what version eu or na

twinnfamous said:
Are u on color os or oxygen os and what version eu or na
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Click to collapse
Oxygen. I have a 2127 from T-Mobile converted to 2123 eu c44

jruizdesign said:
Oxygen. I have a 2127 from T-Mobile converted to 2123 eu c44
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Click to collapse
Try c.44 na version

twinnfamous said:
Try c.44 na version
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Click to collapse
That's 2125 right? How do I update to the same version?

jruizdesign said:
That's 2125 right? How do I update to the same version?
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Click to collapse
Use the full zip to update to the 2125 version c.44

twinnfamous said:
Use the full zip to update to the 2125 version c.44
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Click to collapse
The strange thing is that even though I'm on EU right now I have no local upgrade option in my system updates...can I flash in a temporary boot twrp?

jruizdesign said:
The strange thing is that even though I'm on EU right now I have no local upgrade option in my system updates...can I flash in a temporary boot twrp?
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Click to collapse
Yes if u can do adb sideload or take password or pin off phone and boot TWRP u should see internal data to flash zip

twinnfamous said:
Yes if u can do adb sideload or take password or pin off phone and boot TWRP u should see internal data to flash zip
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Click to collapse
I've been trying all day to do this, twrp won't mount anything, with or without password it won't decrypt and the android recovery is useless. I am not trying to manually flash each item from the payload.

jruizdesign said:
I've been trying all day to do this, twrp won't mount anything, with or without password it won't decrypt and the android recovery is useless. I am not trying to manually flash each item from the payload.
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Have you factory reset after you updated to a12 ? If so that's why TWRP won't see internal storage. Did you try to sideload the zip? I've used adb sideload to flash zips Everytime I screwed the phone up

twinnfamous said:
Have you factory reset after you updated to a12 ? If so that's why TWRP won't see internal storage. Did you try to sideload the zip? I've used adb sideload to flash zips Everytime I screwed the phone up
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Click to collapse
No I've been avoiding wiping system at all costs, it seems like Everytime it gets set up I have to start all over

How do you local upgrade in a12? I'm on c44

tancam said:
How do you local upgrade in a12? I'm on c44
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Click to collapse
Download the version you want to install from oxygen updater then install the app from this post so you local upgrade
Post in thread '[TMO] 9 PRO MODEM RETENTION' https://forum.xda-developers.com/t/tmo-9-pro-modem-retention.4292445/post-86328243

Question OnePlus 9 Pro 5g T-Mobile (USA) to Android 12 (Global)

So I have a OnePlus 9 Pro 5g T-Mobile (USA) and I was able to successfully put in the official Global Android 11 build in it (11.2.10.10.LE15AA).
I had cell and data service when I using the global android 11 build, however when I upgrade the phone to android 12 I lose all service, both data and cell service (sim card is not even being detected, there are 2 empty sim slots showing in the notification bar).
What do I do next? Is there a step by step guide? I saw many posts scattered across different threads trying to resolve this issue, but it was very hard to follow.
Note: I have backed up my original T-Mobile MODEMST1/2 AND PERSIST PARTITION images before I changed my ROM.
I have tried the following method, which resulted in a brick.
Method 1 (DOES NOT WORK-BRICK)
1. Tried to convert to the EU MSM but it didnt work.
2. converted my phone to India MSM and it worked
3. Under the India MSM i did a local upgrade to the Global Android 11 build in it (11.2.10.10.LE15AA).
4. flashed the t-mobile modem
fastboot flash modem_a NON-HLOS.bin
fastboot flash modem_b NON-HLOS.bin
5. Brick

Before jumping to Android 12 you needed to flash the data retention zip. That'll tell the system you are on 1 sim and not 2.

luckylui said:
Before jumping to Android 12 you needed to flash the data retention zip. That'll tell the system you are on 1 sim and not 2.
Click to expand...
Click to collapse
thank you. how do flash the that file and do you have a link for that file?

samdaman91 said:
thank you. how do flash the that file and do you have a link for that file?
Click to expand...
Click to collapse
[TMO] OOS/COS DATA FIX
TO CLARIFY THIS IS A ROOT ONLY FIX After gaining root install given module. Data is now retained. Even after reboot(s). No empty slot or waiting. Issue is TMO variant is showing multi sim. So props were added to make it like a conversion to...
forum.xda-developers.com
Adb sideload it or flash it through a custom Rom recovery

When updating Global from android 11 to android 12, DONT, and i reapeat, DONT update with the incremental update or you will lose data. You MUST use the FULL update through the oneplus Oxygen Updater from the play store, and chose the full update, and you will keep data.

skinsmalone said:
When updating Global from android 11 to android 12, DONT, and i reapeat, DONT update with the incremental update or you will lose data. You MUST use the FULL update through the oneplus Oxygen Updater from the play store, and chose the full update, and you will keep data.
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Click to collapse
Do I still need to flash the data retention zip?

samdaman91 said:
Do I still need to flash the data retention zip?
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Click to collapse
I didnt, but maybe i got lucky. But if you do, it has to be flashed with MAGISK . So you have to be rooted.

skinsmalone said:
I didnt, but maybe i lucked out. But if you do, it has to be flashed with MAGISK . So you have to be rooted.
Click to expand...
Click to collapse
Got it. Out of curiosity is there a way to flash it without root?

samdaman91 said:
Got it. Out of curiosity is there a way to flash it without root?
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Click to collapse
Based on the instruction, it said it was a root only fix. I may be wrong, but thats what i remembered.

I would highly recommend simply updating as far as you can via T-Mobile, flashing C.62 EU firmware via https://www.mediafire.com/folder/sxdpvifk83q9g/OnePlus_Firmware_Updates#p36biy56icbc4 and then installing your custom ROM.

zefyx said:
I would highly recommend simply updating as far as you can via T-Mobile, flashing C.62 EU firmware via https://www.mediafire.com/folder/sxdpvifk83q9g/OnePlus_Firmware_Updates#p36biy56icbc4 and then installing your custom ROM.
Click to expand...
Click to collapse
when you say flashing, are you talking about using MSM?

samdaman91 said:
when you say flashing, are you talking about using MSM?
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Click to collapse
No, updating it all the way through to the latest firmware. If you have a T-Mobile version I recommend flashing the data retention zip.. I've had zero luck converting over to a custom Rom and Global without it. I'm currently running Pixel Experience at the moment with spark kernel.

luckylui said:
No, updating it all the way through to the latest firmware. If you have a T-Mobile version I recommend flashing the data retention zip.. I've had zero luck converting over to a custom Rom and Global without it. I'm currently running Pixel Experience at the moment with spark kernel.
Click to expand...
Click to collapse
Let me get his straight. Are you that I should:
step 1: go back to TMobile stock rom
Step 2: update the T-Mobile stock rom as much as you can
Step 3: flash the data retention with root (magisk is the best way)
Step 4: flash c.62 EU firmware. How do you do this? With msm?

samdaman91 said:
Let me get his straight. Are you that I should:
step 1: go back to TMobile stock rom
Step 2: update the T-Mobile stock rom as much as you can
Step 3: flash the data retention with root (magisk is the best way)
Step 4: flash c.62 EU firmware. How do you do this? With msm?
Click to expand...
Click to collapse
Go back to stock T-Mobile firmware and update it all the way to the latest firmware which is C.62, flash the data retention zip through magisk and then you can go ahead with a custom Rom of your choice.

luckylui said:
Go back to stock T-Mobile firmware and update it all the way to the latest firmware which is C.62, flash the data retention zip through magisk and then you can go ahead with a custom Rom of your choice.
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Click to collapse
Thank you. I don't want to go to a custom rom. I just want to go to the global a12. So to do that how can I can flash the a12?

samdaman91 said:
Thank you. I don't want to go to a custom rom. I just want to go to the global a12. So to do that how can I can flash the a12?
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Click to collapse
In that case do the stock T-Mobile firmware, update your phone to 11.2.10.10 (I believe is the last update before A12) flash the Data retention zip, download Oxygen Updater application and download then install the Global version from there.

luckylui said:
In that case do the stock T-Mobile firmware, update your phone to 11.2.10.10 (I believe is the last update before A12) flash the Data retention zip, download Oxygen Updater application and download then install the Global version from there.
Click to expand...
Click to collapse
Latest before A12 is 11.
2.9.9

luckylui said:
In that case do the stock T-Mobile firmware, update your phone to 11.2.10.10 (I believe is the last update before A12) flash the Data retention zip, download Oxygen Updater application and download then install the Global version from there.
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Click to collapse
i cannot use the oxygen updater since i am on tmobile stock firmware. how do i install the global version from tmobile stock?

samdaman91 said:
i cannot use the oxygen updater since i am on tmobile stock firmware. how do i install the global version from tmobile stock?
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Click to collapse
In that case you need the Tmo-EU msm and then find the 11.2.9.9AA ROM to install through the updater.

samdaman91 said:
when you say flashing, are you talking about using MSM?
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Click to collapse
No