----- 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.... -----
----- 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 bricked issues, but will help assist.)NO MORE MODEM FLASHING!!!
Now the Fun Part (SIMPLE)
Backup your damn data!!!
1. Run TmoEU MSM
2. local update 11.2.10.10AA zip
(Global very important)
3A. OTA update OOS12, OTA to OOS13
3B. Regardless at this point. Re-run TmoEu Msm to Lock-in Modem !!!
Now follow again...
Reboot... Unlock, Local update to 10.10AA, and take the updates to OOS13....
AS LONG AS YOU ONLY USE TmoEU MSM as your unbrick tool
OOS/COS DATA FIX FOR A12 (ROOT) {DEPRECIATED}
MAGISK Module zip provided below...
((((Going to OOS12 & OOS13, Global build will need to be updated prior to taking A12 update. Only way data retain module will work.....))))
(link)

[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...

---ONLY USE TO GO BACK FOR WARRANTY & TRADE PURPOSES


Use Tmobile MSM (Stock) to go back to complete stock. For warrenty, trade in purposes. No!, modem will not stick after ota, duh
[WARNING!!!]
INCASE YOU MESSED UP OR HAD NO CHOICE BUT TO SAVE DEVICE BY USING IN OR EU MSM'S. THERE IS A FIX!!.
-Modded MSM to take you back to TMobile Stock.....
TMO_MSM(IN-EU_Return-to-Stock)
TMO_MSM(IN-EU_Return-to-Stock).zip

Now everything you need is available here on XDA, but for convenience it's right here.
DOWNLOADS
All Files Located Here!!!---------------------------------------------------------------------
FASTBOOT IMGS
(A11 only)(DO NOT FLASH MODEM IMG VIA OOS A12 & A13)
(CRASH DUMP & DEATH WILL OCCUR)
- This will be left here for users with Non-Tmo variant, but have T-mobile service and need access to bands.
- Just use modem flasher, unzip and run .bat file (A11 only)
visit TG for T-mobile 9 pro for community growth and helpful conversations


Join «T-Mobile Oneplus 9 Pro Support» on TELEGRAM
Donations welcomed:
CASHAPP
PAYPAL
First off I can't stress enough how much time and effort was put into this process, no amount of modem flashing, no signal, and device sacrifice would stop us. Not to mention this variant is treated with extreme prejudice from OnePlus

Special Thanks to:
@Jhoopes517
for stumbling upon signal still being there. The amount of replicating is to die for



@FizzyAps
for not sleeping, not even taking a damn break until it was explained & able to process


Without him T-mobile variant would be left in the dark.. So please appreciate his hard work and much more simplicity to come and for providing fastboot script


@twinnfamous
For providing data retain module.
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