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How To Guide Convert your T-Mobile (LE2127) to EU via MSM, No unlock.bin needed!

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I am feeling pretty confident in this.

Have all the files I need etc. One last thing I want to check before I do it.

"
  1. Execute MSMDownloadTool V4.0.exe and msm normally."

    I was reading this >>
  2. On the login promptselect "Other" in the dropdown menu and click on Next.
    Wait a few seconds until main window shows up.
    Click on Target button and select O2 while using global tool or India while using indian tool or EU when using european tool.
    Press Start button (this is done so that device will be "captured" automatically by tool instead of going back to normal boot after 10 seconds)

    Power your device off.
    Let it cool down for one minute.
    Hold both volumes in to get in Qualcomm EDL mode and the screen will stay black. While holding, plug in the USB cable from your phone to your computer. Let volumes go alter plugged in.
    Wait some time (should not be longer than ~300 seconds).
    Enjoy your brand new device.

    from this link https://forum.xda-developers.com/t/...l-to-restore-your-device-to-oxygenos.4180837/

I just want to make sure those are the steps I am following when I use the MSM tool to flash to global. I am stuck on 11.2.6.6, the TMO variant is hella slow on updates.


Yup, more or less, that's the process to "restore" it. Which is what is required prior to the EU conversion.
 

AwkwardUberHero

Senior Member
Yup, more or less, that's the process to "restore" it. Which is what is required prior to the EU conversion.
Sorry for the dumb question, but when we are MSM'ing, that is what we use to select the EU software version to flash to? Or, is that a step that we take before we even convert it over to that version?

I've been researching for a few hours last night, and today, but still not making any ground on this.
 

AwkwardUberHero

Senior Member
The MSM package in the OP is the EU conversion, you don't select anything
OK. Just click other when MSM opens, and hit start? There are some boxes in the MSM tool that I don't know if should be checked or not, just wanting to verify before I try this. Sorry again, after researching last night and today, I am almost ready to give it a go.
 

craznazn

Senior Member
Nov 12, 2009
557
266
OnePlus 8T
OnePlus 9 Pro
OK. Just click other when MSM opens, and hit start? There are some boxes in the MSM tool that I don't know if should be checked or not, just wanting to verify before I try this. Sorry again, after researching last night and today, I am almost ready to give it a go.
Don't mess with any settings in the MSM tool


So I am converted to the EU Version. Now can I update to the global version through local upgrade?
Yes.
 
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I tired that one this AM, root required as well. haha.


Alright, dang, guess I had a brainfart there. Completely forgot that needed root. Could have sworn it was able to back them up without root, though....

Oh, right, I remember now. I initially used it to back up the persistent images and kept it since it could back up and restore just about anything else. Slipped my mind since then because I always backed the vendor and boot image files up as soon as I installed an update (but before restoring Magisk and rebooting). So *technically* it has root at that point but the files are stock? If that makes sense?

But for first time backup... not a good option, I guess. Nuts. Unfortunately, I don't know how to do it otherwise as I had always had root, even prior to doing this conversion. Hopefully someone can explain how.
 
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AwkwardUberHero

Senior Member
Alright, dang, guess I had a brainfart there. Completely forgot that needed root. Could have sworn it was able to back them up without root, though....

Oh, right, I remember now. I initially used it to back up the persistent images and kept it since it could back up and restore just about anything else. Slipped my mind since then because I always backed the vendor and boot image files up as soon as I installed an update (but before restoring Magisk and rebooting). So *technically* it has root at that point but the files are stock? If that makes sense?

But for first time backup... not a good option, I guess. Nuts. Unfortunately, I don't know how to do it otherwise as I had always had root, even prior to doing this conversion. Hopefully someone can explain how.
I appreciate the info. I have looked online, but cannot find a video showing how this is done on a 9Pro. I have found videos showing how it is done on a 7, 8, and 8 pro.


Guessing it is similar to how these are done, but with the info from the OP.
 
I appreciate the info. I have looked online, but cannot find a video showing how this is done on a 9Pro. I have found videos showing how it is done on a 7, 8, and 8 pro.


Guessing it is similar to how these are done, but with the info from the OP.


I would assume that's the case, yes. But good stuff to know for future. And for anyone else who needs it.
 

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  • 1
    I've decided to trade in my 9 pro. I believe I'll need to relock the bootloader to do so.

    Should I be able to do so before trading it in? I'm on the EU version of the rom on a tmo 9.pro.


    Just MSM back to stock. It locks the bootloader in the process.
    1
    Just MSM back to stock. It locks the bootloader in the process.
    I have that setup in a virtual machine that the trial expired on. Didn't want to have to pay for the vm to do this again.
  • 8
    *** Use this at your very own risk.
    *** You will lose all data
    *** Backup your working modemst1/2 and persist. If you lose these for any reason, it's unique to your device and not recoverable if you didn't back up (via MSM or other people).
    *** Read the entire post and follow the steps closely before asking for help. Post all error messages and steps you took. If you just ran a bunch of unknown commands, I would tell you to MSM.
    *** Know how to use the MSMTool, Don't start before figuring it out. https://forum.xda-developers.com/t/op9pro-repository-of-msm-unbrick-tools-tmo-glo-in.4272549/
    *** DO NOT ATTEMPT THIS IF YOU ARE NOT FAMILIAR WITH ANY STEP DESCRIBED IN THIS GUIDE



    Disclaimer: I initially did not want to release this conversion because you still need to unlock the bootloader to fix modem, but this conversion lets you unlock the bootloader without needing unlock.bin. Since OnePlus's website is currently broken, the only way to backup the partitions above is via EDL. I've had the conversion tested and there seem to be no issues, and you can make the backups afterwards. Just keep in mind that if something goes wrong and the above partitions are lost, you are really screwed and there's no way back. If you are not comfortable with this, turn back now.

    General notes:

    • NR and LTE bands are read only and not modifiable, 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.
    • The T-Mobile modem is not compatible with any other variant's NON-HLOS, meaning you need to flash back the T-Mobile modem in order to have cell connectivity.
    • Dual-SIM does not work.

    Prerequisites:
    • You must be SIM unlocked. This conversion will not SIM unlock you.
    • Verify "Enable OEM unlocking" is not greyed out in Developer Options
    • Familiarity with MSMDownload tools. If the regular MSM tool doesn't work for you, turn back now.
    • Back up all data, it will be wiped.

    Download:

    Steps:
    1. Unzip both the conversion and modem zip files.
    2. Execute MSMDownloadTool V4.0.exe and msm normally.
    3. Connect to wifi (not sure if necessary)
    4. Go to Developer Options -> Enable OEM Unlocking. If this is greyed out, it means you are still SIM locked and didn't read the whole guide (You may need to reboot a few times, but if it stays greyed you are still locked). MSM back to T-Mobile and get it unlocked first.
    5. Reboot to bootloader
    6. Unlock your bootloader, no unlock.bin needed:
      Code:
      fastboot oem unlock
      or
      Code:
      fastboot flashing unlock
    7. Follow instructions on phone to unlock bootloader.
    8. Boot back to bootloader and flash modem:
      Code:
      fastboot flash modem_a NON-HLOS.bin
      fastboot flash modem_b NON-HLOS.bin
    9. You are done converting. Make sure to keep NON-HLOS around, you'll need to flash it after every OTA.

    Fastboot method:
    * The steps in this guide will convert your TMO LE2127 to EU 11.2.3.3. This is intentionally not the latest version to force you to take a FULL OTA.
    * You can use this guide to convert to your own variant by extracting payload and flashing from a full OTA. No support will be given if you choose to manually do it.
    * Use the latest platform tools: https://developer.android.com/studio/releases/platform-tools. DO NOT USE MINIMAL ADB, it has not been updated for years.
    * Fastboot can't see your device? https://forum.xda-developers.com/t/...stboot-mode-windows-10.4194491/#post-84943553
    * Test that you can boot to fastbootd prior to starting, "fastboot reboot fastboot" and you should see the OnePlus logo with the text "fastbootd" on top. Do not continue if this doesn't work.
    * When encountering issues, describe all steps you took, paste any outputs, and take screenshots. Make sure to include the output of fastboot --version in your post.

    Steps to convert your device to EU
    1. You need your device bootloader and SIM unlocked. See https://forum.xda-developers.com/t/how-to-unlock-the-t-mobile-bootloader.4256319/
    2. Download and unzip the conversion package:
      • EU 11.2.3.3
        MD5: cb949816fa80d5f0d984359b819426c3
    3. Boot to bootloader.
      • From adb:
        Code:
        adb reboot bootloader
      • From fastboot/bootloader:
        Code:
        fastboot reboot bootloader
    4. Execute "flash_all.bat" from the unzipped directory from step 2.
    5. Reboot into recovery, and wipe everything.
    6. Once fully booted, connect to WiFi and download Oxygen Updater and take the FULL OTA (11.2.4.4 as of this writing)
    7. Do a regular reboot, don't reboot to fastbootd, bootloader, recovery, etc. Reboot to system.
    8. Reboot into bootloader or fastbootd, and flash the T-Mobile modem.
      Code:
      fastboot flash modem NON-HLOS.bin
    9. After each Full OTA you take in the future, you will need to repeat step 7 & 8

    FAQ
    • Q: The most recent version is 11.2.4.4, why is this guide converting to 11.2.3.3?
      A: You didn't read the full post.
    • Q: Why is there no conversion to Global?
      A: Global variant uses the Google incremental OTA server, and full OTAs are not always provided. There's no functional difference, and EU has better privacy requirements anyways. You can do it manually by extracting payload.bin and running the same flash script. No support will be provided if you choose to flash to Global.
    • Q: Can I re-lock the bootloader after conversion?
      A: While you can go ahead lock your bootloader after conversion, I don't recommend it as you will not be able to take incremental OTA due to modem changes, and lose connectivity if you take a full OTA. To fix it, you need to unlock the bootloader and end up wiping.
    • Q: Where is the Linux guide?
      A: Too lazy, if you're using Linux, you can make your own bash script from the Windows batch script.
    • Q: Help, I see is 'fastboot' is not recognized as an internal or external command.
      A: Your fastboot.exe is not in your $PATH. You can either drop fastboot into the same folder as flash-all.bat, or you can fix your $PATH
    • Q: Help, I cannot boot to fastbootd because previous flashes messed things up.
      A: MSM
    • Q: Help, "not enough space to resize [system, product, system_ext]"
      A: MSM. If the error is on Vendor, it might still work and boot with a generic Android boot logo. If so, take the full OTA as described in the guide.
    • Q: Help, something went wrong!
      A: Post in here the starting state of your device (Device model, ROM version, etc), all steps you've taken since unlocking bootloader, and the output of whatever is causing you trouble. Chances are, the answer is MSM, but read my MSM warning.
    • Q: Help, I see "Invalid sparse file format at header magic"
      A: Ignore this message, not an error


    Fixing the About Phone page

    These steps are optional, and will fix the "About Phone" page. There are no performance differences. All that's done is change build.prop to reflect the correct model.
    1. You need to rooted with Magisk
    2. Download and install the magisk module: here
    3. Reboot, the About Phone page is filled out.


    Issues so far (please post if you run into more):
    • Dual SIM does not work
    • Dialer's vvm doesn't seem to work with T-Mobile, might be a T-Mobile issue though.
    • You must flash the T-Mobile modem after every OTA
    • Wildvine L1 is a crapshoot, you may or may not be lucky. Worked for me with only magiskhide enabled and blocking Google Play Services, but many people not having the same luck.
    What appears to work:
    • Everything else.

    Much appreciation for everyone that help develop and test
    @razercortex
    @retryfail
    @amaroney55
    5
    Due to OnePlus's incompetence on running a website, the MSM conversion is released today to enable bootloader unlocking for folks who are SIM unlocked but can't download an unlock.bin
    2
    Thank you for all the help it helped me convert my first oneplus device Im glad I did it.
    2
    Goodness man. Presently I see where I wrecked. I did the EU 11.2.4.4 and not the 11.2.3.3. much obliged for this and clearing that up. Likewise, thank you again for assisting me with saving my mobile. JBBattery
    2
    Well, OnePlus sent you link to your email.
    why you don't try to redownload?
    Because OnePlus broke their website and you can't download a working unlock.bin anymore.