General [TMO] 9 PRO MODEM RETENTION/DATA FIX

[Libra420T]

----- 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.... -----​

​

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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...

forum.xda-developers.com

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---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!!!]​

--Do not use IN or EU MSM or you will not be able to go back to Tmobile stock(which voids everything with warrty, etc)

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

drive.google.com

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Now everything you need is available here on XDA, but for convenience it's right here.​

DOWNLOADS​

All Files Located Here!!!
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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.

 

[razercortex]

In my experience, using my own modem seemed to work better, not exactly sure why. I got slower speeds flashing someone else's modem.

 

[Libra420T]

Not sure how that truly would effect.

 

[Libra420T]

Since TWRP is now functional

I've added a twrp file to restore Tmobile modem (11.2.5.5)

follow twrp guide above {post #1}

 

[Libra420T]

My apologies everyone. I provided an update to the twrp backup (above). Fixed issue where backup file wasn't showing in twrp... Again extract file from zip, move to twrp file on device...

 

[Samuel Holland]

Do you think this modem could benefit me any on AA version using TMobile as my provider or any ups or downs? I guess I could always try after making a backup to my modern, do y'all think so? Edit- I just flashed it and everything seems to be ok so far. How I did it was I made a backup of my modem, & then replaced the files with the ones you posted. Thanks

 

[Libra420T]

Do you think this modem could benefit me any on AA version using TMobile as my provider or any ups or downs?

Of course. As a temporary fix. Definitely best to MSM tool back to Tmobile and backup your modem images.
**Always backup

 

[car king]

This thread is created to provide all who need T-Mobile Modem.img, from loss of service due to an OTA, Flashing, or EU Conversion..

Also to prevent cluttering up other threads with same question.

--- FASTBOOT IMG (11.2.3.3)
Unzip image, move to PC
Reboot to Bootloader
fastboot command
"fastboot flash modem *modem.img"
*Replace modem with tmobile modem.
Flash A/B

---TWRP BACKUPS (11.2.5.5)
Unzip file, move to twrp folder
reboot recovery, Restore, Select file,
Flash on Modem partition, reboot

Good luck & Happy Flashing

**Edit:
If from Tmobile, flashing to custom rom service will be fine. since dual sim isn't a thing for NA..
-If using EU conversion to avoid unlock.bin, then you absolutely need to flash modem after every update...

***Reason to use:
OTA update causes Tmo modem to be replaced..
-EU does the same...
-Or just want Tmo modem instead of stock because you have tmobile service.

img=11.2.3.3 twrp zip=11.2.5.

anyone experience on qulacome dump crush page ??after flashing tmobile modem
?

 

[Libra420T]

anyone experience on qulacome dump crush page ??after flashing tmobile modem
?

which process u using, fastboot or twrp?
Otherwise imgs are clean and work perfectly. Provide process if u don't mind..

 

[car king]

which process u using, fastboot or twrp?
Otherwise imgs are clean and work perfectly. Provide process if u don't mind..

fastboot using on color os

load android 12 then downgrade to color os which i want to test out, need to flash modem to get data . the android 12 modem works fine ...only 4G so try to use Tmobile modem but no luck

 

[RumRunner19]

Although I have managed to root, use Magisk, flash Omega multiple times, take OnePlus updates, I am unsure about the instructions in the first post. It seems like a mixture of steps and comments. Sorry for my noob-ness. Can I flash this modem (I am a TMobile user) using Franco Kernal Manager? If not can someone list the exact steps for fastboot?
Thanks, I appreciate it!

 

[Libra420T]

fastboot using on color os

load android 12 then downgrade to color os which i want to test out, need to flash modem to get data . the android 12 modem works fine ...only 4G so try to use Tmobile modem but no luck

pretty sure android is issue. tmo modem came from A11 so not sure

 

[TheKnux]

I pulled the modem files to the 11.2.5.5 T-Mobile firmware for the OnePlus 9 Pro if you want them. If it helps anyone. I do seem to get much better service on the 5.5 modem than I did with the 2.2 modem.

In my room, I always got 1 to 2 bars. I now get 3 to 4. Granted, I use Wi-Fi most of the time, but my 5G is faster than the Wi-Fi here due to not being able to get good internet out here.

 

[Libra420T]

I pulled the modem files to the 11.2.5.5 T-Mobile firmware for the OnePlus 9 Pro if you want them. If it helps anyone. I do seem to get much better service on the 5.5 modem than I did with the 2.2 modem.

In my room, I always got 1 to 2 bars. I now get 3 to 4. Granted, I use Wi-Fi most of the time, but my 5G is faster than the Wi-Fi here due to not being able to get good internet out here.

yes of course if you have 5.5 img please upload , I only have 5.5 for twrp and 3.3 as img.

 

[TheKnux]

Okay, gimme a few. Gotta start up my ancient laptop and throw it on the otg drive, upload it to gdrive, and I'll post the link here.

Edit: Link Posted. https://drive.google.com/drive/folders/1LFEy0q58Dke1t_Uh7bdTxdp-wY0YFs_Z?usp=sharing

Modem_a/_b are fastboot flashable. Modemst1/st2 have to be flashed via fastbootd.

Fastboot flash modem_a modem_a.img

Fastboot flash mkdem_b modem_b.img

Fastboot reboot fastboot

Fastboot flash modemst1 modemst1.img

Fastboot flash modemst2 modemst2.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.

 

[Libra420T]

.

 

[xpdragon]

Okay, gimme a few. Gotta start up my ancient laptop and throw it on the otg drive, upload it to gdrive, and I'll post the link here.

Edit: Link Posted. https://drive.google.com/drive/folders/1LFEy0q58Dke1t_Uh7bdTxdp-wY0YFs_Z?usp=sharing

Modem_a/_b are fastboot flashable. Modemst1/st2 have to be flashed via fastbootd.

Fastboot flash modem_a modem_a.img

Fastboot flash mkdem_b mkdem_b.img

Fastboot reboot fastboot

Fastboot flash modemst1 modemst1.img

Fastboot flash modemst2 modemst2.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.

There is typo in the 2nd fastboot cmd.
I got the following error when fastboot flash modemst1/2...

fastboot flash modemst1 modemst1.img
target reported max download size of 805306368 bytes
sending 'modemst1' (3072 KB)...
OKAY [ 0.077s]
writing 'modemst1'...
FAILED (remote: Flashing is not allowed for Critical Partitions
)

 

[craznazn]

Holy crap guys,
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2

DON'T MESS WITH OR SHARE MODEMST1/2

It contains your device specific info, device specific NV data, IMEI, etc. Flashing someone else's modemst will screw up your device and lose all cellular capability (and you are completely SOL if you don't have a backup), and someone with your modemst might be able to clone your IMEI.

This is why my guides all tell you to back them up, so you can restore it in case something goes wrong. You should not be messing with it unless you know what you're doing.

The only modem file you need to flash on to a OP9P conversion is modem.bin, AKA NON-HLOS.

 

[xpdragon]

Holy crap guys,
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2
don't mess with or share modemst1/2

DON'T MESS WITH OR SHARE MODEMST1/2

It contains your device specific info and IMEI. Flashing someone else's modemst will screw up your device and lose your IMEI / all cellular capability (if you don't have a backup), and someone with your modemst might be able to clone your IMEI.

The only modem file you need to flash on to a OP9P is modem.bin, AKA NON-HLOS.

So flashing the 2 cmds below should still be good for modem, right?

fastboot flash modem_a modem_a.img
fastboot flash modem_b modem_b.img

 

[craznazn]

Question: op9, I have converted from tmobile to Global(AA) and have experienced no calls inbound/outbound. Flashed non-hlos from Tmo and things got worse. Wondering if the 11.2.5.5 on AA will persist with issue or resolve. The one I flashed was from 11.2.3.3 I believe

Don't use a OP9P NON-HLOS on a OP9, there are obvious differences.

So flashing the 2 cmds below should still be good for modem, right?

fastboot flash modem_a modem_a.img
fastboot flash modem_b modem_b.img

Yes, that should be the only thing you touch