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

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adewaleandrew

Senior Member
Sep 25, 2013
58
8
lagos
OnePlus 9 Pro
pls after converting to eu i was unable to unlock bootloader,had to use msm to revert back to tmobile
 

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jwidel

Member
Jun 25, 2021
16
4
Only thing I'm facing is having to do adb reboot fastboot as I've never gotten fastboot rebooot fastboot to work.
Adb reboot bootloader then once your at boot loader menu that pops up when your phone boots. Then fastboot reboot bootloader and you should see oneplus logo and underneath that it will say fastboot. Confirm your in fastboot by typing fastboot devices.
 

avid_droid

Senior Member
Aug 24, 2019
2,054
691
Maui,Hawaii
OnePlus 9
i can not for the life of me figure out how to use msm. can the eu firmware just be flashed in fastboot?
Install a adb composite driver along with the Google USB driver. The composite driver is the only way I found to work for me. Open up the MSM tool and choose the win7 version. Select OTHER and Next. Power off your phone completely,hold vol+ & - and plug in your phone to PC. It should say connect on the MSM tool
 
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nimeshc

Member
Jan 2, 2012
5
0
Just got my Tmo Oneplus 9 Pro (sim unlocked) & would very much like to go to EU firmware.

Couple of basic questions before I start. Also extremely sorry if I sound stupid. For this process to work, I need to backup persist, modemst1 & modemst2 right? For that I need to first unlock bootloader & root.

Once I backup the persist & modemst files, I just need to follow the "Steps" provided in the OP?

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.

After Step 9, my 9 Pro will be flashed to EU version & I can update the OS to latest version using "OnePlus Updater"? Once that is done, do I need to reflash modemst1, modemst2 & NON-HLOS.bin?

Also with this approach, I hope I don't need to follow the steps mentioned in Fastboot Method?
 
Last edited:
Just got my Tmo Oneplus 9 Pro (sim unlocked) & would very much like to go to EU firmware.

Couple of basic questions before I start. Also extremely sorry if I sound stupid. For this process to work, I need to backup persist, modemst1 & modemst2 right? For that I need to first unlock bootloader & root.

Once I backup the persist & modemst files, I just need to follow the "Steps" provided in the OP?



After Step 9, my 9 Pro will be flashed to EU version & I can update the OS to latest version using "OnePlus Updater"? Once that is done, do I need to reflash modemst1, modemst2 & NON-HLOS.bin?

Also with this approach, I hope I don't need to follow the steps mentioned in Fastboot Method?


Correct, you will need to back those up. You don't need to be rooted to do so, though. You can use ADB to do this. I don't recall the exact commands (I am searching for them as I think this response through, lol), as they can differ depending on the device. I do recall it was the dd command and you can run it from Windows' CMD prompt or in Terminal apps on your device.

EDIT: OP linked this Python script in an earlier post. I have not tried it, but it's worth a shot. I can't find the specific DD commands needed for this device's backup, though I know some gracious soul had posted them in this thread somewhere. If you do decide to root prior to the conversion process, there are much easier methods to do it, but that's up to you.

Once those are backed up, you can proceed with the steps, yes, including updating with Oxygen Updater. Reboot into Android, and run the commands mentioned in the OP to flash your NON-HLOS files. Don't reflash the others, just the one I mentioned.

The fastboot method is only there as an alternative method in case any of the process above that fails. Don't worry about it if you've succeeded in the other method.
 
Last edited:

Top Liked Posts

  • 1
    I finally got this to work and am having a total brain fart now. I am trying to flash the non hlo bin modems, but it keeps telling me waiting for any device.

    I am using windows 10, and thought I had all the drivers installed

    I am doing "adb reboot bootloader," and it boots to bootloader.

    From there, if I try and run the flash command in the OP, I get the waiting for any devices error.

    What did I miss?
    Pls can u dm me the steps cos I just got mine s unlocked it's TMobile and am waiting for unlock code still
    1
    Adb reboot bootloader then once your at boot loader menu that pops up when your phone boots. Then fastboot reboot bootloader and you should see oneplus logo and underneath that it will say fastboot. Confirm your in fastboot by typing fastboot devices.
    Have you read the thread. Thank you but issue was resolved
    1
    Have you read the thread. Thank you but issue was resolved
    Nope sorry I didn't it was the last reply on the bottom and I was exiting so I figured I try to help if I could.
    1
    Fastboot steps are on the first page,but embrace MSM it's a life saver, I go btw T-Mobile to EU randomly using MSM,it helps unbrick most oneplus devices
    1
    i can not for the life of me figure out how to use msm. can the eu firmware just be flashed in fastboot?
    Install a adb composite driver along with the Google USB driver. The composite driver is the only way I found to work for me. Open up the MSM tool and choose the win7 version. Select OTHER and Next. Power off your phone completely,hold vol+ & - and plug in your phone to PC. It should say connect on the MSM tool
  • 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.