KB2007 On KB2005 Android 12

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jcsww

Senior Member
I have spent the better part of the evening trying to figure out what is wrong with the full update package for Android 12 for NA/Global. This is the one way out of the many I tried, that reliably worked for the KB2007 T-Mobile USA device to get it to running Android 12 without issues on the North American/Global firmware.

This ideally is for those of us that have a KB2007 that used the MSM Tool conversion to the EU firmware. Using Local Update does not fully convert to the NA/Global, even when using a full update package, which leaves the device with issues. For some reason, when updating to the KB2005 Android 12 using the full firmware image, you lose the second SIM slot, which just makes it worse. After plenty of flashes to figure this out. I have figured out a complicated mess of a way to do so.

I tried going to a couple of the full updates before Android 12 from the EU and still had issues after the update to Android 12 with performance. That is why I decided upon this longer method. Update using the full KB2005 image to Android 12. Easiest place to get it is from Oxygen Updater. Install it via Local Update. Download the rollback app, install it, and download the rollback package to flash through the rollback app. Rolling back to KB2005 using the downgrade image returns dual-SIM to the KB2007. That will have wiped your device so proceed through the setup until finished. Download Oxygen Updater again, download the stable KB2005 Android 12 incremental update through the System Updater, install it, and you should be as close what a KB2007 can get to a KB2005. I tried the full package update but that always disables dual-SIM after updating to Android 12, whether you do a factory reset before the flash and after or not.

Having an MSM Took to directly convert the KB2007 to KB2005 might have made this somewhat easier.
 
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The Fume

Member
Dec 30, 2019
42
8
dang i was coming here to see if anyone was able to do this and or had issues doing so. looks like if we are on an unloced tmo version phone we might be stuck with oos11 till things get figured out if they do. bummer. i really wish i had not waited when they put them on sale and got the normal 8t vs this tmo version those were sold out by the time i saw the sale though. just like i still cant figure out how to get vowifi / wifi calling working on this ive tried everything i could find online and nothing works to add those settings back

oddly im on the latest version of oos11 on the kb2007 converted and i can see sim 1 and 2 but sim 2 is greyed out. i actually was trying to get that working on oos11 and for me it does not work. did you have it working on 11?
 
Last edited:

bigfry

Member
Mar 31, 2010
16
4
Same problem with 12 here. We accidentally updated to 12 via the OTA update and it not only gave us the same symptom (SIM 2 visible, but disabled), but it also screwed up internet connectivity on SIM 1. Calls and text still seemed to work, but internet only via WiFi.

I spent last night and a good chunk of today troubleshooting it, and finally just went back to fully operational latest version of 11 via MSM and local update. It would be nice to be on the latest version, but browsing through the OnePlus forums, it looks like 12 is still a hot mess anyway.
 

The Fume

Member
Dec 30, 2019
42
8
bummer hopefully someone will figure it out sooner or later. i really dont want to go back to the tmobile rom in order to update
 

ITMASTER

Senior Member
Jan 30, 2008
390
30
Yerevan
I just talked to OnePlus support center and they confirmed unlocked version will not be stock again :( Once they will finish selling T-Mobile version webpage will be cleaned from any 8T info. I really want to get unlocked for 399. and now only way to get this go for KB2000 CN version that sill stocked. The price for T-Mobile version is good 349 but based on conversion mess I don't want go for that. Also I am sure TM will stop on OOS11 and will not rollout OOS12 ever.
 

The Fume

Member
Dec 30, 2019
42
8
i agree ^^ any updates from anyone on this? any type of workarounds? this sucks i wish i would just went with the one off amazon instead of directly through oneplus now. we have three here we love the phone but i am not sure we will ever be able to upgrade now.
 

ITMASTER

Senior Member
Jan 30, 2008
390
30
Yerevan
Same problem with 12 here. We accidentally updated to 12 via the OTA update and it not only gave us the same symptom (SIM 2 visible, but disabled), but it also screwed up internet connectivity on SIM 1. Calls and text still seemed to work, but internet only via WiFi.

I spent last night and a good chunk of today troubleshooting it, and finally just went back to fully operational latest version of 11 via MSM and local update. It would be nice to be on the latest version, but browsing through the OnePlus forums, it looks like 12 is still a hot mess anyway.
Can you check the about page after upgraded to OOS12 is this sill showing wrong picture and missing some info?
 

duy24

New member
Dec 5, 2020
2
1
Same problem with 12 here. We accidentally updated to 12 via the OTA update and it not only gave us the same symptom (SIM 2 visible, but disabled), but it also screwed up internet connectivity on SIM 1. Calls and text still seemed to work, but internet only via WiFi.

I spent last night and a good chunk of today troubleshooting it, and finally just went back to fully operational latest version of 11 via MSM and local update. It would be nice to be on the latest version, but browsing through the OnePlus forums, it looks like 12 is still a hot mess anyway.
I have the same issue you had with the network on mobile data. I downloaded oos 11 and used magisk to install os11 to keep root , however I still have data isdue on the mobile network. Fine on wifi. Any suggestions?
 
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The Fume

Member
Dec 30, 2019
42
8
you may want to try to use the msm tool to go back. or try the posted downgrade tool. i personally used the msm tool to go back to stock then re upgraded to latest 11. i hope i dont get hit with it myself. this was on my daughters phone.
 

jllll

Member
Aug 18, 2022
18
7
Thanks for sharing this instruction!

So basically:
0) Oxygen Updater can be used to download the full/incremental OOS 11/12 kb2005 images mentioned below. (Probably also need to use MSM tool to rebrand as EU version before all these?)
1) System Update - Local Update to install OOS 12 kb2005 (full);
2) "Rollback app" to OOS 11 (rollback);
3) Regular system update to OOS 12 (incremental).

It seems pretty reasonable. Would you instruct more on what "rollback app/package" you use? This is the closest I found online: https://www.droidwin.com/downgrade-oneplus-8-pro-8t-to-oxygenos-11-android-11/ but please correct me if it is not the right one.

Does this method still work now? Do you have dual-sim dual volte/wifi calling working?
 
Last edited:

alphahere

Senior Member
Nov 6, 2010
664
180
Thanks for sharing this instruction!

So basically:
0) Oxygen Updater can be used to download the full/incremental OOS 11/12 kb2005 images mentioned below. (Probably also need to use MSM tool to rebrand as EU version before all these?)
1) System Update - Local Update to install OOS 12 kb2005 (full);
2) "Rollback app" to OOS 11 (rollback);
3) Regular system update to OOS 12 (incremental).

It seems pretty reasonable. Would you instruct more on what "rollback app/package" you use? This is the closest I found online: https://www.droidwin.com/downgrade-oneplus-8-pro-8t-to-oxygenos-11-android-11/ but please correct me if it is not the right one.

Does this method still work now? Do you have dual-sim dual volte/wifi calling working?
I just tried this method and dual sim is not working.
 

Mr Hassan

Senior Member
Feb 14, 2016
765
40
OnePlus 10 Pro
I can fix this issue but for this i need
Unpack repack rom which is not possible
I try all kitchens but not workable if anyone can help me to unpack repack rom then i can fix it i even got the problem spot
Just need to test it now
If anyone able to do this just tell and i can fix it
But make sure don't mention payload dumper
I need extract whole rom sys ven prod etc
 

alphahere

Senior Member
Nov 6, 2010
664
180
Thanks. I can't even get rollback app working so I gave up. Dual sim immediately after MSM again. Then I just did regular system update to the latest OOS software. Probably just switch to pixel next year.
Concur - Oneplus needs dual sim in the US. The carriers have blocked this for years but that wall in falling. Almost all the flagship and some midrange phones have e-sim and physical sim. So dual sim is here to stay. Oneplus needs to get on board the train.
 

raven911

Senior Member
Aug 17, 2009
54
0
I have this some issue after upgrading to Android 12. Is there any way to roll-back to Android 11, WITHOUT losing data and needing to wipe? And would it then allow the dual-sim to be working again?
 

raven911

Senior Member
Aug 17, 2009
54
0
Also, has anyone else tried the above method and had success with having a dual-sim Android 12 using the T-mobile KB2007?
 

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    I have spent the better part of the evening trying to figure out what is wrong with the full update package for Android 12 for NA/Global. This is the one way out of the many I tried, that reliably worked for the KB2007 T-Mobile USA device to get it to running Android 12 without issues on the North American/Global firmware.

    This ideally is for those of us that have a KB2007 that used the MSM Tool conversion to the EU firmware. Using Local Update does not fully convert to the NA/Global, even when using a full update package, which leaves the device with issues. For some reason, when updating to the KB2005 Android 12 using the full firmware image, you lose the second SIM slot, which just makes it worse. After plenty of flashes to figure this out. I have figured out a complicated mess of a way to do so.

    I tried going to a couple of the full updates before Android 12 from the EU and still had issues after the update to Android 12 with performance. That is why I decided upon this longer method. Update using the full KB2005 image to Android 12. Easiest place to get it is from Oxygen Updater. Install it via Local Update. Download the rollback app, install it, and download the rollback package to flash through the rollback app. Rolling back to KB2005 using the downgrade image returns dual-SIM to the KB2007. That will have wiped your device so proceed through the setup until finished. Download Oxygen Updater again, download the stable KB2005 Android 12 incremental update through the System Updater, install it, and you should be as close what a KB2007 can get to a KB2005. I tried the full package update but that always disables dual-SIM after updating to Android 12, whether you do a factory reset before the flash and after or not.

    Having an MSM Took to directly convert the KB2007 to KB2005 might have made this somewhat easier.
    1
    Same problem with 12 here. We accidentally updated to 12 via the OTA update and it not only gave us the same symptom (SIM 2 visible, but disabled), but it also screwed up internet connectivity on SIM 1. Calls and text still seemed to work, but internet only via WiFi.

    I spent last night and a good chunk of today troubleshooting it, and finally just went back to fully operational latest version of 11 via MSM and local update. It would be nice to be on the latest version, but browsing through the OnePlus forums, it looks like 12 is still a hot mess anyway.
    I have the same issue you had with the network on mobile data. I downloaded oos 11 and used magisk to install os11 to keep root , however I still have data isdue on the mobile network. Fine on wifi. Any suggestions?