• Introducing XDA Computing: Discussion zones for Hardware, Software, and more!    Check it out!

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

Search This thread
I gave it a try about five or six times, and did not make it very far.

I was getting the Sahara communication error, and the firehose handshake failed error as well.

I am going to quit while I am ahead and not risk bricking or doing anything irreversible.


Sometimes it's as simple as trying a different (non-3.x) USB port or even a different cable.
 

mypd1991

Senior Member
Oct 19, 2010
90
6
I don't understand how this is a how-to guide, but yet they don't show you how to root to actually do the process correctly. Since this is specific to the T-Mobile variant.
 

mypd1991

Senior Member
Oct 19, 2010
90
6
Uh, the OP has a link to a modem you can use. You can always dump your own modem as well. There are also other threads on this forum for modem updates.
The OP also says to backup your modem and that they're unique to your phone. Yes, which requires root to do which was my main point, and every post I've seen says you need to root to backup and the resting guides post nothing for the T-Mobile variety which is what this thread is specifically about.
 

craznazn

Senior Member
Nov 12, 2009
556
265
OnePlus 8T
OnePlus 9 Pro
The OP also says to backup your modem and that they're unique to your phone. Yes, which requires root to do which was my main point, and every post I've seen says you need to root to backup and the resting guides post nothing for the T-Mobile variety which is what this thread is specifically about.
Dude, I am the op.

Nowhere does it say you must backup your modem. You should backup your persist and modemst1/2. These partitions are not modem.

The thread was created prior to the MSM conversion. Back then, you needed an unlocked bootloader to do anything, and flashing things around can lead to... instability and you should already have the ability to root anyways.

Now, you can MSM to EU, then just unlock the bootloader without the need for a token. You can then root and backup what you need, and it's highly recommended. The OP does still give you an option for backup:
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.

So, if you are not comfortable, don't do it.
 
Last edited:
  • Like
Reactions: GuyInDogSuit

AwkwardUberHero

Senior Member
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?
 
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?
Check device manager and make sure fastboot drivers are installed. Fastboot can't see the device.
 
  • Like
Reactions: AwkwardUberHero
Yep, that is what it was. Thanks. I got cell service working now, and data as well. Cannot enable RCS but not a huge deal currently.


Happened to me, too. I ended up just leaving it alone for some time and checked it later, to find it was enabled. Apparently that can happen if they're having trouble switching it to the "current/new" device as the "old" one needs to be deregistered. You might need to check the "Messages for Web" page linked in the settings (either on a PC or change to "desktop view") and remove the "old" device. At that point, give it about 10 days at most, iirc, and it should be on again.
 
  • Like
Reactions: AwkwardUberHero

AwkwardUberHero

Senior Member
Happened to me, too. I ended up just leaving it alone for some time and checked it later, to find it was enabled. Apparently that can happen if they're having trouble switching it to the "current/new" device as the "old" one needs to be deregistered. You might need to check the "Messages for Web" page linked in the settings (either on a PC or change to "desktop view") and remove the "old" device. At that point, give it about 10 days at most, iirc, and it should be on again.
I feel like when I switched from a pixel to my 9 pro this happened as well. It is fine, the only person around who really uses RCS with me is my wife.

I am enjoying the smooth experience of the EU rom so far. No issues, waiting for the battery to break in, but other than that, smooth so far.
 

adewaleandrew

Senior Member
Sep 25, 2013
66
8
lagos
OnePlus 9 Pro
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
 
  • Like
Reactions: AwkwardUberHero

Kenkool12

Senior Member
Jul 10, 2021
89
13
Where am confused is must I unlock bootloader before doing it or I can go ahead without it then unlock boot when on eu
You can unlock the bootloader once you flash to the EU version then you have to have the bootloader unlocked and have an unlocked sim for it work at all. If you don't have a unlocked sim then it won't work. As long as your sim unlocked. You have to have boot loader unlocked after you flash EU variant so you can get service.
 

Top Liked Posts

  • There are no posts matching your filters.
  • 1
    1
    Nope. Stock kernel as well.


    That's really strange. Did you happen to skip that "about phone" fix?
    1
    Will that effect me getting software updates? Someone on Reddit said to download the full update not the incremental and install it also?

    I'm not quite sure a full update is needed, as it's only necessary if you're rooted, but perhaps for some people it is? The "about phone" thing shouldn't mess with it, as the phone still identifies itself correctly to the servers and to the Play Store. I think it's a cosmetic thing, really.
    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.