How To Guide OnePlus 9 Pro TMO Le2127 Converted to Global Le2125 OOS 13 OB2

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Appreciative

Senior Member
Mar 6, 2015
213
121
Hello everyone,

I am new here - I bought the LE 2127 by mistake as I was going to try and de-Google the OnePlus 9 Pro by flashing Lineage OS. So I have a few questions that I hope someone will answer as I am not a developer but learning every day. I have already downloaded and used adb & fastboot on to my Pop OS laptop and taken out quite a few google apps including the Play store and replaced it with MicroG and my banking app works just fine. I get the occasional error with Signal, but it still works. My concern with the OnePlus is a Chinese backdoor? Anyone know about that and if there is one on this model?

Here are my questions:

1. Are you guys in the US? I am in the southeast.
2. Changing the LE2127 to LE2125, will that work with Mint?
3. Once I follow the directions and change to the LE2125 - I should be able to switch to another Custom OS? Like Lineage, right? The LE2125 is the last model they support.
4. Would I be de-Googled with OOS or do I have to re-de-google the phone again...

Mostly, what are the benefits of switching to LE2125 if you keep Oxygen; just getting rid of the T-Mobile apps? As I said, I am a total beginner, so any advice would be amazing.

L
#2) yes, it should continue to work fine, you'll flash your current modem back in anyway (if android 11 or 12, some say 13 works) Be sure to backup modemst1/2 to be safe. Multiple users report success with Tmo mvno working just fine all across.
#3) yes, you should be able to.
#4) you will have to re-de-google because you'll be going from Tmo to EU using the MSM tool, it's a clean slate and like-new state.

The first benefit is flashing Tmo->EU allows you to unlock the bootloader without the OnePlus Token site. You can unlock it the traditional way. Neither way requires the sim to be unlocked but it's certainly more convenient than waiting a week.

I would recommend submitting to OnePlus Token site just to have the backup option/unlock token bin that matches your device. I submitted mine and immediately flashed to EU and unlocked. Then when I flashed back to Tmo, I verified the unlock worked either way.

And the cruise over to global/other roms.

The other benefit is not having any of tmobile's bloatware, animations, and preventing automatic updates. I don't know 100% for the 9P but the Tmo 7TP5GME, they force the update, you can't prevent it by postponement. Having root and unlocked bootloader also didn't prevent the update from happening. I've since read that the Tmo variants can push the update and restart (so you lose root because you can't go flash magisk boot OTA back to inactive slot). Others who weren't yet to the maximum postponement amount would block the download servers in Hosts with root and avoid it that way
 
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ErickVelez08

Member
Nov 14, 2022
10
0
Hello everyone,

I bought a OP 9 pro LE2127 with student discount in the official page, I always used Xiaomi and change roms in these devices, for that reason I thought that is similar in OnePlus, because I read a lot of foros in XDA and Telegram and saw the horrible problem with updates in T mobile.


My question is, this process is safe, because I wouldn't like that my cellphone dead.
 

ErickVelez08

Member
Nov 14, 2022
10
0
Ohh thanks I'm going to try this because my OP are going to arrive to my house today. I hope that all works perfectly. I had to wait three weeks because I live in Ecuador/LATAM
 

ErickVelez08

Member
Nov 14, 2022
10
0
It works perfectly if you follow the Guide instead of installing OOS 13 OB2 following conversion you can install the OOS 13 F.16 stable. After installation preform a factory reset and you will have a perfectly running Le2125 Global phone with no TMO.
Ohh thanks I'm going to try this because my OP are going to arrive to my house today. I hope that all works perfectly. I had to wait three weeks because I live in Ecuador/LATAM
 

TheGhost1951

Senior Member
Feb 11, 2009
1,182
247
Garfield
OnePlus 9 Pro

mbj731

Senior Member
Sep 13, 2014
209
54
It works perfectly if you follow the Guide instead of installing OOS 13 OB2 following conversion you can install the OOS 13 F.16 stable. After installation preform a factory reset and you will have a perfectly running Le2125 Global phone with no TMO.
I did all of this and am now on F.16 but unable to unlock bootloader. Were you able to unlock bootloader? I was able to before going to A13
 

mbj731

Senior Member
Sep 13, 2014
209
54
You have to request the unlock token from OnePlus.
My understanding was by MSMing from Tmo to EU and then updating to Global it bypassed the need for the unlock token. I had the bootloader unlocked before going to Android 13 via Oxygen updater by simply toggling OEM unlock and fastboot oem_unlock command. Cant remember which version I was on when I did the unlock, but it worked somewhere between MSMing to EU to global updating up to the latest OTA. (had to get A13 through Oxygen Updater)

If going through Oneplus for a token is the only way, thats fine... but it was my understanding that going this route bypassed that, and it did for me at one point.
 
My understanding was by MSMing from Tmo to EU and then updating to Global it bypassed the need for the unlock token. I had the bootloader unlocked before going to Android 13 via Oxygen updater by simply toggling OEM unlock and fastboot oem_unlock command. Cant remember which version I was on when I did the unlock, but it worked somewhere between MSMing to EU to global updating up to the latest OTA. (had to get A13 through Oxygen Updater)

If going through Oneplus for a token is the only way, thats fine... but it was my understanding that going this route bypassed that, and it did for me at one po

My understanding was by MSMing from Tmo to EU and then updating to Global it bypassed the need for the unlock token. I had the bootloader unlocked before going to Android 13 via Oxygen updater by simply toggling OEM unlock and fastboot oem_unlock command. Cant remember which version I was on when I did the unlock, but it worked somewhere between MSMing to EU to global updating up to the latest OTA. (had to get A13 through Oxygen Updater)

If going through Oneplus for a token is the only way, thats fine... but it was my understanding that going this route bypassed that, and it did for me at one point.
Redo the conversion and install OOS 13 OB2 !
 

craznazn

Senior Member
Nov 12, 2009
783
1
482
OnePlus 8T
Samsung Galaxy S22 Ultra
I did all of this and am now on F.16 but unable to unlock bootloader. Were you able to unlock bootloader? I was able to before going to A13
You have to unlock the bootloader while on A11. After running my conversion MSM, first thing you should do is unlock the bootloader before updating to A12/A13. If you don't, you will not be able to unlock it later without the unlock_code.bin
 

MENINBLK

Senior Member
Why should I do EU first, and then go Global?
What's the benefit of that, compared to simply staying on EU?
You can only go from TMO to EU MSM because EU doesn't check the existing ROM for compatibility.
Then you can go from EU to Global MSM with no issue.
Once on Global, you enable developers mode and unlock the bootloader and you are done.
No token needed.
The Firmware will also be updated to LE2125.
No re-google is necessary.
All ROMs are oem and have all Google apps already installed.
Use Magisk for root.
 
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  • 1
    Hi @Bulauski2005,
    I have a unlocked t mobile op9 pro, I converted the firmware to LE2123 to get Oxygen OS 13 with MSM, it works fine except 1 problem that you mentioned, that sim problem after i restart the phone, so you are telling me that if i follow your guide and convert my phone to LE2125 will it detect only 1 sim ? I dont need 2 sims I only need my 1 sim to work properly.
    Thanks in advance.
    Try a factory reset. That worked for me !
    1
    After converting to LE2125, right?
    No try it right now ! If that doesn't work than yes after you convert to LE2125
  • 2
    First convert to EU using the TMO to EU MSM Tool then install global firmware from the OnePlus website. Update it all the way to C.65 then install the OOS 13 OB2 firmware, go into settings and factory reset and your done VOILA ! Everything works including 5G mm wave.
    2
    Ey folks, I'm trying to follow the process with some misunderstanding:
    1- I converted to EU using https://forum.xda-developers.com/t/...7-to-eu-via-msm-no-unlock-bin-needed.4272837/ until step 2 (inclusive)
    2- I downloaded OP ROM OSS 11.2.10.10.LE15AA and installed manually

    Phone still indicates model LE2127 and suggest me to update to LE2115.11.F17_2170_202211231111

    Should I proceed with it instead of F16?
    What about "Update it all the way to C.65" where can I download them?

    You can find several versions of upgrade boot and apk files here:


    Edit: The first post has an apk and instructions along with boot images. The second post has firmware zips for various versions
    2
    I did all of this and am now on F.16 but unable to unlock bootloader. Were you able to unlock bootloader? I was able to before going to A13
    You have to unlock the bootloader while on A11. After running my conversion MSM, first thing you should do is unlock the bootloader before updating to A12/A13. If you don't, you will not be able to unlock it later without the unlock_code.bin
    2
    Ey folks, I'm trying to follow the process with some misunderstanding:
    1- I converted to EU using https://forum.xda-developers.com/t/...7-to-eu-via-msm-no-unlock-bin-needed.4272837/ until step 2 (inclusive)
    2- I downloaded OP ROM OSS 11.2.10.10.LE15AA and installed manually

    Phone still indicates model LE2127 and suggest me to update to LE2125.11.F17_2170_202211231111

    Should I proceed with it instead of F16?
    What about "Update it all the way to C.65" where can I download them?
    The only way the model will change is if you follow the conversion directions and use the MSM Tool in the links provided in the conversion directions.
    Otherwise it will stay as an LE2127.
    The conversion process gets rid of the TMO ROM and overwrites the device with OnePlus OOS ROM and Firmware via the MSM Tool.
    2
    Hello everyone,

    I am new here - I bought the LE 2127 by mistake as I was going to try and de-Google the OnePlus 9 Pro by flashing Lineage OS. So I have a few questions that I hope someone will answer as I am not a developer but learning every day. I have already downloaded and used adb & fastboot on to my Pop OS laptop and taken out quite a few google apps including the Play store and replaced it with MicroG and my banking app works just fine. I get the occasional error with Signal, but it still works. My concern with the OnePlus is a Chinese backdoor? Anyone know about that and if there is one on this model?

    Here are my questions:

    1. Are you guys in the US? I am in the southeast.
    2. Changing the LE2127 to LE2125, will that work with Mint?
    3. Once I follow the directions and change to the LE2125 - I should be able to switch to another Custom OS? Like Lineage, right? The LE2125 is the last model they support.
    4. Would I be de-Googled with OOS or do I have to re-de-google the phone again...

    Mostly, what are the benefits of switching to LE2125 if you keep Oxygen; just getting rid of the T-Mobile apps? As I said, I am a total beginner, so any advice would be amazing.

    L
    #2) yes, it should continue to work fine, you'll flash your current modem back in anyway (if android 11 or 12, some say 13 works) Be sure to backup modemst1/2 to be safe. Multiple users report success with Tmo mvno working just fine all across.
    #3) yes, you should be able to.
    #4) you will have to re-de-google because you'll be going from Tmo to EU using the MSM tool, it's a clean slate and like-new state.

    The first benefit is flashing Tmo->EU allows you to unlock the bootloader without the OnePlus Token site. You can unlock it the traditional way. Neither way requires the sim to be unlocked but it's certainly more convenient than waiting a week.

    I would recommend submitting to OnePlus Token site just to have the backup option/unlock token bin that matches your device. I submitted mine and immediately flashed to EU and unlocked. Then when I flashed back to Tmo, I verified the unlock worked either way.

    And the cruise over to global/other roms.

    The other benefit is not having any of tmobile's bloatware, animations, and preventing automatic updates. I don't know 100% for the 9P but the Tmo 7TP5GME, they force the update, you can't prevent it by postponement. Having root and unlocked bootloader also didn't prevent the update from happening. I've since read that the Tmo variants can push the update and restart (so you lose root because you can't go flash magisk boot OTA back to inactive slot). Others who weren't yet to the maximum postponement amount would block the download servers in Hosts with root and avoid it that way