[GUIDE] Convert TMO to EU via MSM Tool, no SIM Unlock or Bootloader Unlock needed!

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TheSayaMan

Senior Member
Sep 12, 2016
454
204
Can't detect sim after updating to Android 12. I couldn't find a fix anywhere. I am using Verizon with the unlocked T-Mobile. Not sure if that has anything to do with it. I had to MSM back to 11 for now.
 

jllll

Member
Aug 18, 2022
18
7
Can't detect sim after updating to Android 12. I couldn't find a fix anywhere. I am using Verizon with the unlocked T-Mobile. Not sure if that has anything to do with it. I had to MSM back to 11 for now.


Does this workaround make any sense to you? It somehow involves the official rollback package and then incremental update back to OOS12. But I haven't had a chance to test it yet.
 

TheSayaMan

Senior Member
Sep 12, 2016
454
204
No, first off, that is for the OnePlus 8T, not the Oneplus 9 Pro and that's about losing one of the sim slots, not about not detecting a sim and having no data or phone services.
 

TheSayaMan

Senior Member
Sep 12, 2016
454
204
I would recommend not trying this. This is a warning to anyone who is thinking about it. If you do try it, stay on Android 11. If you update to Android 12, it will not detect your sim and you will not be able to send and receive phone calls, nor have data services. The only thing you will have is text messaging. I have been trying for a week and a half trying to get back to T-Mobile and there are only two modified MSM's that return to stock and neither work for me. Also the magisk data fix doesn't work, so don't even bother trying. You will still only have texts working. It does indeed convert your phone to EU but it will cause problems later. Just a word of warning. As a last resort, I even backed up my persist, param and modems, and used the SMT download option in MSM which wiped my IMEI thinking that maybe I had corruption in the partitions. No big deal because I restored my backup to get everything back but the problem still exists.
 
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jcsww

Senior Member
I would recommend not trying this. This is a warning to anyone who is thinking about it. If you do try it, stay on Android 11. If you update to Android 12, it will not detect your sim and you will not be able to send and receive phone calls, nor have data services. The only thing you will have is text messaging. I have been trying for a week and a half trying to get back to T-Mobile and there are only two modified MSM's that return to stock and neither work for me. Also the magisk data fix doesn't work, so don't even bother trying. You will still only have texts working. It does indeed convert your phone to EU but it will cause problems later. Just a word of warning. As a last resort, I even backed up my persist, param and modems, and used the SMT download option in MSM which wiped my IMEI thinking that maybe I had corruption in the partitions. No big deal because I restored my backup to get everything back but the problem still exists.
Updating to Android 12 works fine for SIM 1 but it does disable SIM 2 on the T-Mobile model. I haven't personally tried rooting to restore the second SIM functionality.
 

TheSayaMan

Senior Member
Sep 12, 2016
454
204
You didn't specify what SIM slot you were having issues with. If you need dual-SIM, sticking with Android 11 will keep both SIM slots enabled.
I only have one sim slot and it's not detected on Android 12 but it's showing two on the phone. It says no sim even though I have one in. Works perfect on Android 11 so I'll just stick with 11.
 

jllll

Member
Aug 18, 2022
18
7
I would recommend not trying this. This is a warning to anyone who is thinking about it. If you do try it, stay on Android 11. If you update to Android 12, it will not detect your sim and you will not be able to send and receive phone calls, nor have data services. The only thing you will have is text messaging. I have been trying for a week and a half trying to get back to T-Mobile and there are only two modified MSM's that return to stock and neither work for me. Also the magisk data fix doesn't work, so don't even bother trying. You will still only have texts working. It does indeed convert your phone to EU but it will cause problems later. Just a word of warning. As a last resort, I even backed up my persist, param and modems, and used the SMT download option in MSM which wiped my IMEI thinking that maybe I had corruption in the partitions. No big deal because I restored my backup to get everything back but the problem still exists.
That is the piece of information that will save other people (like me) weeks of time would have been wasted on this.

Such a shame that OnePlus now tortures the users to this extent just for bowing to carriers. I am returning the phone and won't consider this company till they stop such sh**y behavior.
 

TheSayaMan

Senior Member
Sep 12, 2016
454
204
That is the piece of information that will save other people (like me) weeks of time would have been wasted on this.

Such a shame that OnePlus now tortures the users to this extent just for bowing to carriers. I am returning the phone and won't consider this company till they stop such sh**y behavior.
Ok, I figured it out finally after so much frustration. I used the EU MSM and reflashed then downloaded the Oxygen Updater app and performed all Global local upgrades through the app and everything is working perfectly now. I'm on current Android 12, Global with fully working phone, calls, texts, data. I don't know why doing this instead of just updating through the built in system updater would make any difference at all but it seems to have!!
 

jcsww

Senior Member
Ok, I figured it out finally after so much frustration. I used the EU MSM and reflashed then downloaded the Oxygen Updater app and performed all Global local upgrades through the app and everything is working perfectly now. I'm on current Android 12, Global with fully working phone, calls, texts, data. I don't know why doing this instead of just updating through the built in system updater would make any difference at all but it seems to have!!
Partial updates versus full package updates more than likely.
 

jllll

Member
Aug 18, 2022
18
7
Ok, I figured it out finally after so much frustration. I used the EU MSM and reflashed then downloaded the Oxygen Updater app and performed all Global local upgrades through the app and everything is working perfectly now. I'm on current Android 12, Global with fully working phone, calls, texts, data. I don't know why doing this instead of just updating through the built in system updater would make any difference at all but it seems to have!!
Congrats! Do you think it is worth it to stay on OOS11 to maintain VoLTE and Wifi Calling on US carriers? Nevermind if it is not related to you.
 

TheSayaMan

Senior Member
Sep 12, 2016
454
204
Congrats! Do you think it is worth it to stay on OOS11 to maintain VoLTE and Wifi Calling on US carriers? Nevermind if it is not related to you.
I have VoLTE now on 12 just no Wifi calling but I don't need Wifi calling. If that's what you want then stay on 11 but it doesn't matter to me. The other thing I forgot to mention is that to ensure you keep all services, you need to root and install the Magisk data fix module with what I did to fix my issues.
 

jllll

Member
Aug 18, 2022
18
7
I have VoLTE now on 12 just no Wifi calling but I don't need Wifi calling. If that's what you want then stay on 11 but it doesn't matter to me. The other thing I forgot to mention is that to ensure you keep all services, you need to root and install the Magisk data fix module with what I did to fix my issues.
Okay thanks for the information. I also tried EU MSM + full local update via oxygen updater to OOS12, and lost connection to the second sim. As you said, root and Magisk data fix module is probably needed. I will keep it simple for now and just stick to OOS11 for a while. But it is very important that you verified that dual VoLTE works in your case.

Update:
EU MSM already brings dual sim/volte/vowifi on t-mobile usa.
System update shows 11.0.13.13.KB05BA the latest stable OOS11 EU firmware. Installed it. Dual sim/volte/vowifi still works. For this purpose, there is no need to flash NA/Global firmware. I will stick with for some time.

The phone reminds me of some good old days of OP5T. I will keep it little longer to see how it goes. Such a pity OnePlus is going downhill now.
 
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  • 1
    A while ago i switched from TMO to international using the old fastboot method. I noticed i haven't gotten any updates since.

    Oxygen updater says I'm not running oxygen. What could be the issue?
    From that screenshot, it looks like you're still running the TMO firmware
    1
    I'm not sure people understand what you mean by getting rw / mount remount in super.img? What exactly do you need?
    read write in rooted system
    or unpack repack rom to modify it
    mount remount also the same thing
    and ofcourse people understand but this device is total sh!t i,m trying to fix it
  • 22
    *** Use this at your very own risk.
    *** You will lose all data
    *** Backup your working modem and persist, just in case
    *** Read the entire post and follow the steps closely before asking for help. Post all error messages and steps you took. Screenshots and MSM logs will be best.



    !!! I have officially retired my 8T, and can no longer provide additional support on this device !!!


    It's finally here! A MSM tool that will convert your T-Mobile OnePlus8T+5G to EU KB05BA. From here you can local upgrade to any OOS flavor you want. This gives you Local Upgrade option, faster upgrades, open betas, dual SIM, and more! In fact, after conversion, you can unlock the bootloader without the unlock token (still need to be SIM unlocked, but in case you don't want to wait for the unlock token or if OnePlus's website is broken)!

    If you are still SIM locked, you lose the Unlock app for when your device becomes unlocked, it's only available in the stock TMO ROM. If you want to go back to TMO ROM at any point, flash back with the TMO MSM: https://forum.xda-developers.com/t/...l-to-restore-your-device-to-oxygenos.4180981/

    Steps:
    1. Download the MSM Conversion package:
      • AFH
        MD5: 5ddb543c8a5e7587e0b2ad24d2025e77
    2. Run MsmDownloadTool V4.0.exe (Windows 7 users may need to run the win7 version included)
    3. Select User type: "Other" and press Next.
    4. Press "Start". Don't mess with the default settings.
    5. Put your phone in EDL mode.
      Code:
      adb reboot edl
      or completely turn off your device, hold vol up + vol down and plug in the cable.
    6. Wait about 5 minutes while it works.
    7. Done! If you keep the bootloader locked and run it stock, the About Phone page will be missing some fields.
    If you run into any MSM tool issues, most likely you have a driver problem. See the FAQ in @Some_Random_Username's post


    Instructions to Bootloader Unlock a SIM locked device:


    1. In ADB:
      Code:
      adb shell pm uninstall -k --user 0 com.qualcomm.qti.uim
    2. Reboot
    3. Go to dev settings and enable OEM Unlock
    4. Reboot to bootloader
    5. Code:
      fastboot oem unlock
      No unlock.bin needed


    Old fastboot method

    *** Know how to use the MSMTool, Don't start before figuring it out.
    *** DO NOT ATTEMPT THIS IF YOU ARE NOT FAMILIAR WITH THE STEPS DESCRIBED IN THIS GUIDE

    * The steps in this guide will convert your TMO KB2007/KB05CB to Global 11.0.5.6.KB05AA, or EU 11.0.3.4.KB05BA
    * NR and LTE bands are flashed in nvRAM, not in modem.img or any other partition. You cannot get global bands by flashing a global ROM, nor can you lose TMO bands by flashing another ROM.
    * Instructions are the same as running any other MSM unbrick tool.
    * You can use this guide to convert to your own variant by extracting payload and flashing from a full OTA. See manual instructions towards the end.
    * Use the latest platform tools: https://developer.android.com/studio/releases/platform-tools, https://forum.xda-developers.com/android/general/tool-adb-fastboot-installer-tool-windows-t3999445. DO NOT USE MINIMAL ADB, it has not been updated for years and will cause a crash where you'll need to MSM back to stock.
    * Make sure your drivers are up to date. This guide will not walk you through setting up platform tools or updating drivers. When encountering fastboot issues, make sure to include the output of fastboot --version in your post.
    * Do not ask for OTAs, MSMs, or anything else not related to the steps described herein. There are plenty of threads around for those.
    * This guide does not pertain to Cyberpunk conversion. See other threads.
    * This guide converts you to an older firmware so you can take a FULL OTA via Oxygen Updater. Do not skip this step if you want a stable build.

    Steps to convert your device to Global or EU
    As simple as possible:
    1. You need your device bootloader and SIM unlocked. Follow the instructions here (It says 6T, but applies to all OP devices): https://support.oneplus.com/app/answers/detail/a_id/588/~/how-to-unlock-bootloader-for-oneplus-6t-(t-mobile-edition)
    2. Download and unzip the conversion package:
    3. Boot to fastbootd.
      • From adb:
        Code:
        adb reboot fastboot
      • From fastboot/bootloader:
        Code:
        fastboot reboot fastboot
      • If you are having trouble booting into fastbootd, and have a FC number at the bottom of the bootloader screen, you'll need to MSM to factory first.
    4. [*]You should be at a screen that says "fastbootd" on top. DO NOT CONTINUE IF YOU ARE NOT HERE. SEE HIDDEN FOR AN EXAMPLE.
      bJDcOTg.jpg
    5. Execute "flash_all.bat" for Windows, or "flash_all.sh" for Linux, from the unzipped directory from step 2 as cwd.
    6. Optional: Flash magisk'd boot
      Code:
      fastboot flash boot boot_magisk_patched.img
    7. Reboot into recovery, and wipe everything.
    8. Once fully booted, download Oxygen Updater, set your device to OnePlus 8T of your regional choice and local upgrade to the latest OTA of your regional choice.
    9. Optional: You can re-lock your bootloader at thois point. DO NOT TRY before the full OTA upgrade above, or you'll have to MSM.

    Manually:

    1. Unlock bootloader
    2. Download the full OTA of your choosing
    3. Extract the OTA payload with https://github.com/vm03/payload_dumper or https://androidfilehost.com/?fid=818070582850510260
    4. With the output of the payload as your cwd, execute:
      Code:
      fastboot flash product product.img
      fastboot flash abl abl.img
      fastboot flash aop aop.img
      fastboot flash bluetooth bluetooth.img
      fastboot flash boot boot.img
      fastboot flash cmnlib cmnlib.img
      fastboot flash cmnlib64 cmnlib64.img
      fastboot flash devcfg devcfg.img
      fastboot flash dsp dsp.img
      fastboot flash dtbo dtbo.img
      fastboot flash featenabler featenabler.img
      fastboot flash hyp hyp.img
      fastboot flash imagefv imagefv.img
      fastboot flash keymaster keymaster.img
      fastboot flash logo logo.img
      fastboot flash mdm_oem_stanvbk mdm_oem_stanvbk.img
      fastboot flash modem modem.img
      fastboot flash multiimgoem multiimgoem.img
      fastboot flash odm odm.img
      fastboot flash qupfw qupfw.img
      fastboot flash recovery recovery.img
      fastboot flash spunvm spunvm.img
      fastboot flash storsec storsec.img
      fastboot flash system system.img
      fastboot flash system_ext system_ext.img
      fastboot flash tz tz.img
      fastboot flash uefisecapp uefisecapp.img
      fastboot --disable-verity flash vbmeta vbmeta.img
      fastboot --disable-verity flash vbmeta_system vbmeta_system.img
      fastboot flash vendor vendor.img
      fastboot flash xbl xbl.img
      fastboot flash xbl_config xbl_config.img
    5. Replace boot.img with your magisk'd boot if desired
    6. Reboot to recovery and wipe everything


    Troubleshooting

    • Error: "remote: no such file or directory"
      You are not in the correct cwd. Fastboot needs to be accessible from the same directory as the .img files, so fix your PATH or make a copy fastboot.exe in the same directory as the .img files
    • Error: "remote: Flashing is not allowed for Critical Partitions"
      You are not in fastbootd. Check step 4.
    • Error: "Invalid sparse file format at header magic"
      Ignore this message, not an error

    Special thanks to:
    @jwarrior319 for the initial linux script
    @cammykool and @awr128 for helping debug some of the steps and clarifying pain points

    @radiohead7778580 for a better Global conversion

    Fixing the About Phone page

    These steps are optional, and will fix the "About Phone" page. There are no performance differences.
    1. You need to rooted with Magisk
    2. Download the fix: here
    3. In the Modules page in MagiskManager, Install the downloaded zip file via "Install from storage"
    4. Reboot, the About Phone page is filled out.


    Issues so far (please post if you run into more):
    • In OOS11, "About phone" page does not work properly.
      • Use the magisk module above to fix it.
    • In OOS12, Dual SIM is not supported.
      • Dual SIM works fine in A12 Custom ROM after conversion, use my enable_dsds module
    6
    I'm glad that the global version is working for everybody!!! For my next trick I'll be trying to mod the MSM Tool for a straight conversation without the need to unlock, stay tuned. I'm going to be needing testers let me know if you're interested.
    5
    MSM conversion tool is uploaded.
    Guide updated, no more fastboot flashing needed!
    4
    Thank you for all the people willing to participate. I will keep everybody posted on my progress!!
    4
    You only get 1 IMEI but it's been working. I've been dailying dual SIM since conversion so long ago. However, I use Mint (T-Mobile MVNO) and T-Mobile postpaid, so that could explain why it works flawlessly.

    I just put in an ATT SIM card side-by-side with TMo and both works.