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

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Senior Member
Nov 12, 2009
OnePlus 8T
OnePlus 9 Pro
Does anybody know how to fix the about screen if I converted the KB2007 to KB2005 without flashing the fix_about_screen.zip?
Thank you
You can't. The internal codename flashed elsewhere that's not touched by the MSM (param maybe, but unsure) calls it "kebabt", where the SIM Free 8T is just "kebab". It's obvious the software just compares the string and sets the value, but the EU/Global/India ROM does not have an entry for "kebabt", so the about phone screen is broken.


May 16, 2015
You can't. The internal codename flashed elsewhere that's not touched by the MSM (param maybe, but unsure) calls it "kebabt", where the SIM Free 8T is just "kebab". It's obvious the software just compares the string and sets the value, but the EU/Global/India ROM does not have an entry for "kebabt", so the about phone screen is broken.
I converted the ROM to Global. But after flashing the fix about screen, it turned to be KB2003. Could you share any way to correct it to KB2005?
Thank you!


Senior Member
May 28, 2015
So just follow eu msm , boot ,download oxy and upgrade correct) haven't done this since 7 pro ...Always get nervous when I come back..lol
Exactly, it took all of 4 mins for the conversion. Download oxygen updater after converting and set your device to oneplus 8T to get the global update so you can download. But have found that the EU ROM literally gets same update as the global. So pretty much no point moving to global IMO.


Dec 18, 2010
North Texas
OnePlus 8T
THe dual sim does work, what is odd is that in the settings it shows both IMEIs are identical. but it does work.
I had read that the TMO only has one IMEI, thanks for confirming that. So if my OPO8T is not Network Unlocked yet, and I do this and put in the second SIM, I can;t see where anyone has confirmed that the second SIM will work with the first still locked.. Is it locked by the IMEI?


Senior Member
Feb 3, 2010
OnePlus 8T
Can I bootloader unlock and root without sim unlock ? I have TMobile version obviously but they won't sim unlock me so I can unlock the bootloader. I just want to know I can root and unlock bootloader and do whatever I want with the phone even tho Im tied to TMobile


Senior Member
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Dec 18, 2010
North Texas
OnePlus 8T
Well i just got home from work and i did it all. I went to oxygen updater and switched to EU , then downloaded the zip. I moved it to my pc unzipped it and then ran the payloader dumper to get the boot.img file for rooting.
I flashed the phone with local upgrade and it did it no problem took about 10 mins.
It rebooted it was still setup with all my current info. I then tested the root and it worked i pushed the magisk_patched.img and then did the next steps everything worked like it should.
So i then rebooted to recovery and re wipped the phone and now setting it up again.
Phone booted I set my user up and then i booted the magisk image then did direct install :)
everything is up and running i have TB will all my apps now on my brand new 8T thanks for all the info
Question, was your phone unlocked by TMO first, and have you tested two SIM cards?

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  • 1
    How to do this for oneplus 8?
    Someone with the phone makes a conversion MSM.
    you can always try using dd, but you need to be rooted already. The phone should still be under warranty I would think that might be the best bet and just get it replaced.
    I had TMobile replace my 8T, the best part was, all I needed was to put my existing SIM card into the replacement phone and I was able to SIM unlock it using the TMO unlock app before converting over to the EU ROM.
    I am getting this error, what could be the solution
    I've heard people having success using different cables / usb ports. YMMV, MSM can be finicky
    I am getting this error, what could be the solution View attachment 5374099
    Keep trying, it might help to keep holding the volume up and down buttons until you see it communicate and start downloading to the phone.
    It will not SIM unlock
  • 14
    *** 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.

    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. Furthermore, if you are still SIM locked, you cannot unlock the bootloader, as the "OEM Unlocking" toggle in dev settings will still be greyed out. 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/

    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.
      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

    Old fastboot method

    *** Know how to use the MSMTool, Don't start before figuring it out.

    * The steps in this guide will convert your TMO KB2007/KB05CB to Global, or EU
    * 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:
        adb reboot fastboot
      • From fastboot/bootloader:
        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.
    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
      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.


    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:
      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


    • 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):
    • None
    What appears to work:
    • 5G
    • Dual SIM
    • AOD
    • Fingerprint sensor
    • Wildvine L1
    • Local Upgrade
    • About screen, if steps are followed above
    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.
    MSM conversion tool is uploaded.
    Guide updated, no more fastboot flashing needed!
    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.
    Sounds like bit of a pain in the ass while latest tmo is already
    I mean, nobody is forcing anyone to convert. Different use cases for different people, the whole point of having unlocked bootloaders. TMO build uses OP Dialer, lack of dual sim, and other restrictions that some like myself find unacceptable, and running EU for me is fine while taking OTAs and updates like normal.