General [TMO] 9 PRO MODEM RETENTION/DATA FIX

[CZ Eddie]

Damn, I backed up a ton of stuff awhile back using Payload Dumper but modemst1/2 got missed somehow.

I had the same issue. To fix it I updated to android 12 11_C.20 then used the msm to go back to T-Mobile stock. I then updated once again to 11_C.20 and used the msm. It makes the modem stick for android 11.

Did you flash the datafix while you were in 12 before you MSM'd back to TMO?

 

[NameIsOptional]

Damn, I backed up a ton of stuff awhile back using Payload Dumper but modemst1/2 got missed somehow.



Did you flash the datafix while you were in 12 before you MSM'd back to TMO?

No. It seems to be an android 11 glitch. If you update to T-Mobile android 12 then msm. It should fix your issue. I don't know if it's a temporary fix or permanent but it worked for me.

 

[CZ Eddie]

I had the same issue. To fix it I updated to android 12 11_C.20 then used the msm to go back to T-Mobile stock. I then updated once again to 11_C.20 and used the msm. It makes the modem stick for android 11.

Could you clarify your steps for me?
Sounds like you're saying to:

1. MSM to stock TMO
2. Take OTA updates all the way until you get the TMO Android 12 version 11_C.20
3. MSM to stock TMO (again)
4. Take OTA updates all the way until you get the TMO Android 12 version 11_C.20
5. MSM to stock TMO (again)

So far, I've MSM to stock TMO.
Then, I OTA updated all the way up to Android version 12 "11_C.16".
I'm doing the next 12 update now (c.20).

 

[CZ Eddie]

Interestingly, after I hit the first Android 12 update, my SIM now comes up as "CARD" instead of "T-Mobile".
And shows as SIM 2 in the "about" section.

 

[CZ Eddie]

1. MSM to stock TMO
2. Take OTA updates all the way until you get the TMO Android 12 version 11_C.20
3. MSM to stock TMO (again)

Tried this but still not getting any network service. ugh

And phone SIM still showing up as "CARD" now too, instead of "T-Mobile".
And I see an "MEID" instead of an IMEI when I go to about/phone.

IMEI isn't lost but doesn't seem to be used as option #1 or something.

 

[CZ Eddie]

@Libra420T you mentioned in another thread that you had the same "No Service" issue before but I missed where you said what the fix was?

 

[Libra420T]

Guide & Files updated.........
I would like everyone to know that I have completed my work here for OnePlus 9 pro. This will be the last update as I no longer have time for this device. Thankfully modem retention is/was a success. I would like to thank each and everyone of you. If you like my work, pick up a Pixel 7 series
Also new link...
Support for T-Mobile OnePlus 9 Series

[TMO] OnePlus 9 Series Support

Support for T-Mobile OnePlus 9 Series

t.me

 

[AharonG20]

3B. Regardless at this point. Re-run TmoEu Msm to Lock-in Modem !!

do I have to re-flash MSM if the modem works after 3A?

 

[TheSayaMan]

do I have to re-flash MSM if the modem works after 3A?

Not necessary anymore since a13. Don't need this. It's a old thread and should be closed

 

[AharonG20]

Not necessary anymore since a13. Don't need this. It's a old thread and should be closed

thanks, so just to be sure - I bought a "global version" on aliexpress which turned out to be TMO. I don't live in the us and it let me unlock the sim, I then followed the steps above. I now have global A13 rom and a working modem, do I have missing bands or am I clear? is there a way to check?

 

[TheSayaMan]

thanks, so just to be sure - I bought a "global version" on aliexpress which turned out to be TMO. I don't live in the us and it let me unlock the sim, I then followed the steps above. I now have global A13 rom and a working modem, do I have missing bands or am I clear? is there a way to check?

If you converted it to Global, you won't be missing anything. I did the same thing with my T-Mobile model.

 

[joecool1029]

If you converted it to Global, you won't be missing anything. I did the same thing with my T-Mobile model.

Not exactly true. If you intend to use the phone on T-Mobile, the Global firmware is missing their NR-CA combos for SA mode. This means it cannot aggregate a lowband 5G with midband 5G, phone has to hop between congested lowband or weak signal midband. If you do intend to use Global firmware on T-Mobile network, it would be a good idea to make sure the phone stays in NSA 5G mode for better performance.

I am considering making flashable firmware zips with the T-Mobile radio for those on custom firmware but want to wait for both the custom rom devs and t-mobile to be on 13 (and 13 blobs, most of the 13 roms are still shipping on 12 blobs).

 

[joecool1029]

@Libra420T you mentioned in another thread that you had the same "No Service" issue before but I missed where you said what the fix was?

I had similar issues and it was due to screwing up my persist and/or efs partitions by flashing wrong modem. Bad news is MSMtool won't fix your issues. I was lucky and had the modemst1/modemst2 backed up which did fix mine. In my case phone worked if I set it to 4G, but 5G was almost totally broken until I flashed my backup on.

 

[TheSayaMan]

Not exactly true. If you intend to use the phone on T-Mobile, the Global firmware is missing their NR-CA combos for SA mode. This means it cannot aggregate a lowband 5G with midband 5G, phone has to hop between congested lowband or weak signal midband. If you do intend to use Global firmware on T-Mobile network, it would be a good idea to make sure the phone stays in NSA 5G mode for better performance.

I am considering making flashable firmware zips with the T-Mobile radio for those on custom firmware but want to wait for both the custom rom devs and t-mobile to be on 13 (and 13 blobs, most of the 13 roms are still shipping on 12 blobs).

In my case, I'm not on T-Mobile. My T-Mobile variant is carrier unlocked to Verizon.

 

[joecool1029]

In my case, I'm not on T-Mobile. My T-Mobile variant is carrier unlocked to Verizon.

Makes sense, I think it's the last Oneplus you can buy with mmwave bands. I think you should be ok, they don't lean heavy on SA yet from what I recall.

 

[chronicmaniac]

Hi Guys;

I have LE2127. It was turned to LE2123 (with EU rom). My current version is LE2123_11_F.74. Everything working fine.

But;

My network connection lost or coming too late (around 1 minute) When I restart my phone or open and close airplane mode.
If my network not come, I'm pulling out my sim tray and put it in again and network come.

There is 2 sim card looking at settings.

I have some questions about these.

1- If I convert my rom EU to Global, will my network problem be fixed and will my phone be single SIM?
2- If I convert my rom EU to Global, will my IMEI change or lost?
3- If I change my rom EU to Global, should I downgrade my rom step by step 13 > 12 > 11 or can I flash Global rom directly via local update or something?

 

[TheSayaMan]

Hi Guys;

I have LE2127. It was turned to LE2123 (with EU rom). My current version is LE2123_11_F.74. Everything working fine.

But;

My network connection lost or coming too late (around 1 minute) When I restart my phone or open and close airplane mode.
If my network not come, I'm pulling out my sim tray and put it in again and network come.

There is 2 sim card looking at settings.

I have some questions about these.

1- If I convert my rom EU to Global, will my network problem be fixed and will my phone be single SIM?
2- If I convert my rom EU to Global, will my IMEI change or lost?
3- If I change my rom EU to Global, should I downgrade my rom step by step 13 > 12 > 11 or can I flash Global rom directly via local update or something?

Your going to have the same problem on Global although I think Global is less buggy and yes, you can downgrade and you can also use the EU to Global MSM I posted earlier in this thread. Either way, your phone will be wiped so back everything up.

 

[chronicmaniac]

Your going to have the same problem on Global although I think Global is less buggy and yes, you can downgrade and you can also use the EU to Global MSM I posted earlier in this thread. Either way, your phone will be wiped so back everything up.

Thank you bro. But I cant find EU to Global MSM in the earlier posts.

Can I change it in OOS 13 with A13 ? Or should I downgrade to A11 ?

Is my modem will change it too?

Sorry dude I asked too much question to you.

 

[TheSayaMan]

Thank you bro. But I cant find EU to Global MSM in the earlier posts.

Can I change it in OOS 13 with A13 ? Or should I downgrade to A11 ?

Is my modem will change it too?

Sorry dude I asked too much question to you.

Go back a few pages, its there, your going to be back on a11 if you use EU to Global MSM

 

[KCAndroid13]

Hi Guys;

I have LE2127. It was turned to LE2123 (with EU rom). My current version is LE2123_11_F.74. Everything working fine.

But;

My network connection lost or coming too late (around 1 minute) When I restart my phone or open and close airplane mode.
If my network not come, I'm pulling out my sim tray and put it in again and network come.

There is 2 sim card looking at settings.

I have some questions about these.

1- If I convert my rom EU to Global, will my network problem be fixed and will my phone be single SIM?
2- If I convert my rom EU to Global, will my IMEI change or lost?
3- If I change my rom EU to Global, should I downgrade my rom step by step 13 > 12 > 11 or can I flash Global rom directly via local update or something?

I have the same device and went through the same conversion and just updated to F.74 as well. When you say everything is working fine, you mean everything BUT the networking? My networking is messed up. If I'm lucky, I briefly get a 5G signal that goes to 4G and then sits on EDGE. I also have the dual sim setup in settings. I lost VoWIFI and also noticed airplane mode doesn't disable wifi in this version. I wish there was a straightforward way to rollback to F.73 or some way to not have to spend hours re-installing and re-configuring all my apps with having to do another conversion.