Help with flashing ROMs on T-Mobile version - OnePlus 7 Pro Questions & Answers

I have a T-Mobile branded OnePlus 7 pro, I got the code from T-Mobile and I unlocked the bootloader and flashed TWRP and Magisk. My question is, can I just install any room or do I need to convert to global international using the msm tool first?
If I can just flash directly, how do I install the open Beta? The instructions say to to do it manually in settings, but that's not an option in the T-Mobile ROM, and each ROM seems to have very specific instructions on how to flash using twrp. Thank you for any assistance.

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flash OnePlus 7 international rom to tmobile

I have a TMobile OnePlus 7 pro (on cricket) rooted(magisk), unlocked carrier, unlocked bootloader, twrp. Can I flash one of the international custom ROMs (like havoc, crdroid or resurrection more specifically an Android 9 version) without flashing the international firmware? I had problems when I previously tried to convert to international that the phone wouldn't recognize my sim even after taking the OTAs.
If not, one I flash to international firmware and do the ota's can I flash an Android 9 rom over oos 10.x.x? I've been out of the game for awhile and the whole ab partition scheme along with how ROMs are for this phone is a bit confusing. Thanks.
devastatorx said:
I have a TMobile OnePlus 7 pro (on cricket) rooted(magisk), unlocked carrier, unlocked bootloader, twrp. Can I flash one of the international custom ROMs (like havoc, crdroid or resurrection more specifically an Android 9 version) without flashing the international firmware? I had problems when I previously tried to convert to international that the phone wouldn't recognize my sim even after taking the OTAs.
If not, one I flash to international firmware and do the ota's can I flash an Android 9 rom over oos 10.x.x? I've been out of the game for awhile and the whole ab partition scheme along with how ROMs are for this phone is a bit confusing. Thanks.
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Firstly how did you unlock the bootloader without going to the international oos. What? Unlock sim and bootloader token?
---------- Post added at 06:59 AM ---------- Previous post was at 06:58 AM ----------
LokifiedMee said:
Firstly how did you unlock the bootloader without going to the international oos. What? Unlock sim and bootloader token?
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Click to collapse
I never had the issue with sim card signal once I updated the oos
Firstly how did you unlock the bootloader without going to the international oos. What? Unlock sim and bootloader token?
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Click to collapse
Yes I carrier unlocked and then flashed the unlock token.
If I don't flash international can I flash custom ROMs or do I have to flash international first? And I I do flash international and then do the ota's, can I flash a custom android 9 rom ontop of oos 10.x.x(10.3.5 I believe is the newest)?
Your oneplus 7 pro is working on cricket? I unlocked my t-mobile op7 pro via tmobile and flashed the global rom and updated. I sold the phone to a friend and he's on cricket. Cricket is telling him the phone isn't supported but prior to selling it to him I put his sim in it and it worked. Made a call and browsed internet. When he went to set it up after factory reset his sim card got locked by cricket and the phone kept turning off with the only way to power on being holding all buttons to enter fastboot. So if I put the t-mobile rom back on it will his service work?
devastatorx said:
Yes I carrier unlocked and then flashed the unlock token.
If I don't flash international can I flash custom ROMs or do I have to flash international first? And I I do flash international and then do the ota's, can I flash a custom android 9 rom ontop of oos 10.x.x(10.3.5 I believe is the newest)?
Click to expand...
Click to collapse
I flashed the global rom with no issues. Sim card didn't work initially but after the first update it worked no problem. It takes ota's with no problem and I didn't even have to unlock the bootloader. The msm tool and op file did the trick

proper way to use TWRP and clean flash rom?

New GM1915 T-Mobile OnePlus 7 Pro user here...
I seemed to be out of the loop since the release of AB partition, android 10 and so-on...
I did everything here says, unlocked the bootloader, unlocked the sim, converted to international, twrp, and root...
[GUIDE] How to convert TMobile OP7 to International.
First of all this is not my work I only tested theirs. Credit to themustached for finding that a patched .ops was the solution. This guy doesn't even have the damn phone yet and did this for us so show some love. You can donate to him through...
forum.xda-developers.com
and when I want to try other rom or revert back to OOS stock, I missed up and brick a the phone 3 times already....each time I have to use MSM tool and flash the rom to Android 9.x...which is missing something twrp needs, So I need to do a OTA update to Android 10.x before I can install twrp and root.....
Q1: say I have a working system at android 10, twrp and root, If I want do a clean flash of the rom, do I now only wipe the (user data partition in the twrp advance wipe) or the (data wipe that you will need to put type yes and wipes everything)?
Q2: is there an updated T-Mobile .ops file to use with MsmDownloadTool? So I can restore to android 10 in 1 step?
Thank you
Looking for an updated .ops file as well my phone is bricked with android 11 and can't seem to get msmdownloadtool to work with my bricked oneplus 7 pro

Question LE2117 TMO/India Pro 5G to OP9 Locked BL?

Good evening,
Is it possible to recover from where I am (LE2117 model on OxygenOS 11.2.10.10.LE25AA, OTA Version OnePlus9Oxygen_22.O.13_GLO_0130_2111112106), or is my only option to be stuck on the OnePlus 9 Pro 5G India version for locked bootloader? If it's possible, what do I need to do? Work demands my phone to not be rooted...I'm not married to the concept of global or India region, and am fine with either.
[Marking each area with a reference at the bottom...]
Problem: I've attempted the OnePlus 9 5G T-Mobile to Global transition [REF001] on my LE2117 only to brick my phone midway through the process. The goal here is to get the phone on a NON-T-Mobile variant with a locked bootloader. Thankfully I'm rid of T-Mobile, at least...
Where I am now: I was able to recover the phone by using the MSM tool for OnePlus 9 Pro 5G India [REF002], then using the T-Mobile to Global "flash_all.bat" script [REF001] again with the payload of the global version [REF003]. The issue is that the phone's bootloader isn't locked, and if I lock it then everything is gone and I must start over at the beginning of this paragraph. I've attempted using the global MSM tool [REF004], but the issue is that it provides a Param Preload error for Unsupported Target IN. There was a reference somewhere about flashing the param.bin, though, that didn't seem to work...
Thank you for your insight and assistance!
REF001: Convert T-Mobile OnePlus 9 to Global (or other) firmware - https://forum.xda-developers.com/t/convert-t-mobile-oneplus-9-to-global-or-other-firmware.4277169/
REF002: OnePlus 9 Pro Oxygen OS India MsmDownloadTool - https://forum.xda-developers.com/t/oneplus-9-pro-oxygen-os-india-msmdownloadtool.4270589/
REF003: OnePlus9Oxygen_22.O.13_OTA_0130_all_2111112106 -
https://oxygenos.oneplus.net/OnePlus9Oxygen_22.O.13_OTA_0130_all_2111112106_03a66541157c4af5.zip
REF004: GLOBAL OnePlus 9 MSM TOOL UPDATED -
GLOBAL OnePlus 9 MSM TOOL UPDATED
Frist off Im not responsible for anything that happens to your phone!!! VERY SIMPLE IF YOU ARE BICKED,BOOTLOOPED OR JUST WANT TO GO BACK TO 100% STOCK THIS WILL WIPE ALL DATA!!! AN RELOCK BOOTLOADER OOS 11.2.4.4.LE25AA MUST HAVE QAULCOMM...
forum.xda-developers.com
Run the Indian 9 Pro MSM again and download the global 9 downgrade package in the pinned post and flash that to get back on global firmware. The MSM re-locks the bootloader as part of the process and you don't need an unlocked bootloader to convert between variants if you use the official local upgrade function.
Thank you for your response EtherealRemnant -
I've followed the steps and am probably doing something wrong. I've run the OP9PRO India MSM, unlocked OEM for the flash (because trying local upgrade (downgrade) at this point doesn't show the packages), flashed to either global downgrade package, and attempted the global MSM tool for re-lock. I'm still getting the Unsupported Target IN or Device Not Match Image error. Which part of this am I doing incorrectly?
TuufLess said:
Thank you for your response EtherealRemnant -
I've followed the steps and am probably doing something wrong. I've run the OP9PRO India MSM, unlocked OEM for the flash (because trying local upgrade (downgrade) at this point doesn't show the packages), flashed to either global downgrade package, and attempted the global MSM tool for re-lock. I'm still getting the Unsupported Target IN or Device Not Match Image error. Which part of this am I doing incorrectly?
Click to expand...
Click to collapse
You may actually be running into the same problem I did with the downgrade package where it just vanishes from the storage. Do it like this on your computer:
adb push packagename.zip /sdcard/
When I did this, it didn't mysteriously vanish anymore.
If this doesn't work, you may unfortunately be stuck unless you can get someone to modify an MSM Tool for your purposes.
Finally, a solution that hopefully others can also follow to install different versions of their official builds as well (just exchange REF004 with your appropriate compressed zip containing the payload.bin.):
[Adding references for those who found themselves in my same predicament...]
After utilizing the MSM Download Tool for OnePlus 9 Pro 5G [India Region] [REF001], I unlocked the bootloader and leveraged the TWRP App for OnePlus 9 [REF002] by booting towards it [REF003] and installing/flashing the latest version of the OnePlus 9 5G [Global] [REF004] (it defaulted to slot B.) Re-locking the bootloader [REF005] allowed the phone to automatically wipe, and boot directly into the latest Global install.
Shout-out to ctonylee1965's post that's nearly buried in an off-related thread, or I wouldn't have found this solution.
[Original Discussion: https://forum.xda-developers.com/t/...a-sahara-connection-error-check-this.4308601/]
ctonylee1965 said:
Got back to global. Took me a day to figure it out. Enable OEM Unlock and USB debugging. I flashed temp TWRP, installed the OS Zip file from OnePlus support site. Rebooted into recovery, formatted and wiped system. Booted into global. This installation is in SLOT B. Slot A will still have horrible Indian Rom (only horrible because it shouldn't be installed on my Global Unlocked Phone, no disrespect to my Indian brothers.) Note when logging in for the first time let global do its OTA update before you do anything else, especially before you reboot. The Indian version is installed in slot A. REBOOT after OTA installed. Don't reboot before OTA does its thing. This will ensure Slot A has a clean installation. I made the mistake of rebooting before the OTA and I could not do anything with slot A. Relock the bootloader, it will wipe and you will boot into a pristine Global OS 11.2.8.8 Rom.
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Click to collapse
Thank you EmerealRemnant for your assistance as well!
REF001 - MSM Download Tool for OnePlus 9 Pro 5G [India Region] - https://forum.xda-developers.com/t/oneplus-9-pro-oxygen-os-india-msmdownloadtool.4270589/
REF002 - TWRP for OnePlus 9 (lemonade) - https://dl.twrp.me/lemonadep/
REF003 - TWRP Commands To Use (Scroll Down) - https://twrp.me/oneplus/oneplus9.html
REF004 - OnePlus 9 5G (Global) Official Build - https://www.oneplus.com/global/support/softwareupgrade/details?code=PM1617074715494
REF005 - Re-locking the bootloader (fastboot oem lock) - https://ihax.io/relock-bootloader-a...ommand to reboot your device: fastboot reboot
It seems strange you had to do all that work when all I had to do was flash the downgrade package...

Question How to convert a oneplus 9 tmobile oos12 to pixel experiencie or another rom

Hi everyone! I have a question! Does anyone know how to install a custom rom on the oneplus 9 t mobile with OOS 12? Do I have to downgrade or can I install a rom that has android 12 by default?
My version its LE2117_11_C.19
You should firstly update to the latest OOS12 update TMo gives us. After that unlock bootloader (as per the guide here on the fourms) via unlock code method (you will have to wait for TMo to send that your way as it's device specific) and then follow the instructions from the rom provider.
I'm running StagOS on my TMo OnePlus 9 without issues since their last release, before that ran Lineage, Jaguar, Nameless. As long as you are updated to latest OOS and with an unlocked bootloader, you can flash any rom on here provided you follow their instructions. If you brick your phone you can use the modified MSM tool I posted on one of my threads to un-brick and bring back to life your phone (keep a backup of your data though)
RandomLatinDude said:
You should firstly update to the latest OOS12 update TMo gives us. After that unlock bootloader (as per the guide here on the fourms) via unlock code method (you will have to wait for TMo to send that your way as it's device specific) and then follow the instructions from the rom provider.
I'm running StagOS on my TMo OnePlus 9 without issues since their last release, before that ran Lineage, Jaguar, Nameless. As long as you are updated to latest OOS and with an unlocked bootloader, you can flash any rom on here provided you follow their instructions. If you brick your phone you can use the modified MSM tool I posted on one of my threads to un-brick and bring back to life your phone (keep a backup of your data though)
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Click to collapse
so can i follow any tutorial to install any rom if i have unlocked bootloader next to sim? since I tried once to change to global and it worked, I put a module and my cell phone and the phone bricked, with the MSM Tool I was able to recover the OOS t mobile version, but I thought I had to downgrades OOS 11 to install any rom and I never did anything again because of fear for the brick
sorry for my bad English
Yasser.d said:
so can i follow any tutorial to install any rom if i have unlocked bootloader next to sim? since I tried once to change to global and it worked, I put a module and my cell phone and the phone bricked, with the MSM Tool I was able to recover the OOS t mobile version, but I thought I had to downgrades OOS 11 to install any rom and I never did anything again because of fear for the brick
sorry for my bad English
Click to expand...
Click to collapse
Yes, that's it. Basically have your phone updated to the latest OxygenOS TMobile can give you,; Have your phone SIM Unlocked AND Bootloader Unlocked and then follow all the steps the Developers of the ROM you choose give for the installation.
If any rom specifically asks for OxygenOS 11, then the same steps are applied except instead of latest OS versión, the one the Dev asks for
Then I will start the installation of some rom that I like on top of the latest update of tmobile OOS 12, do you recommend any specific one that is pixel experience or similar performance?
RandomLatinDude said:
Yes, that's it. Basically have your phone updated to the latest OxygenOS TMobile can give you,; Have your phone SIM Unlocked AND Bootloader Unlocked and then follow all the steps the Developers of the ROM you choose give for the installation.
If any rom specifically asks for OxygenOS 11, then the same steps are applied except instead of latest OS versión, the one the Dev asks for
Click to expand...
Click to collapse
For example, when I go to the official lineageOS 19.1 page, it says that the compatible devices are all except mine LE2117, do I continue to install anyway?

Question LE2115 return to stock

Hello,
Just got a Oneplus 9 today. Installed Jaguar to try it out. Wanted to go back to stock to compare a few things.
I grabbed the "stock" files and tried to flash using this guide: https://forum.xda-developers.com/t/fastboot-rom-pc-required-op9-stock-oos-11-2-2-2aa.4275727/
This bricked the phone.
I was able to restore the phone via MSM using the Indian one (lemonadep_22_I.07_210412), but in OxygenOS it states the Phone is a 9 Pro.
I tried flashing the STOCK file again just to see (since I now know I can recover in EDL), but it bricked the phone again.
This allowed me to confirm that for Global LE2115, the European MSM (lemonadep_22_E.05_210324) also works to restore the device!
Unfortunately again, it says the Phone is a 9 Pro.
How would I proceed if I wanted to return a LE2115 to stock and relock the bootloader?
Thanks
Found my answer in this post: https://forum.xda-developers.com/t/fixed-hard-bricked-le2115.4452435/#post-86967531
Copy pasta:
To get back to global firmware, flash this in the local upgrade tool.
https://oxygenos.oneplus.net/OnePlu...all_2107082125_downgrade_059624cc7298428b.zip
It is the global downgrade package. It will wipe your phone and when it comes back, you will be back on global software.
After you flash that, go to OTA upgrade and it will say it's going to download C.48 but it will actually install 11.2.10.10 and then you will have the latest OOS11.
Click to expand...
Click to collapse
Can confirm this works!
I used the unnbrick tool from one community server and restored my one plus 9 5g 2115.to stock and locked the bootoader. But I could not get to install any rom because it always took me to crash dump. Hope it helps to get back to proper version for you

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