How To Guide How To: Unlock the T-Mobile Bootloader

[craznazn]

So I used msmdownloadtool to get back to stock Tmo... After successful installation. I again unlocked Bootloader to flash global rom... Unfortunately problem still there... I have to manually flash Tmo modem img after every flash or ota
anyone have latest 11.2.4.4 Tmo_Modem img?

You can try to extract the latest modem prior to conversion. Otherwise just use the modem we have

 

[Libra420T]

You can try to extract the latest modem prior to conversion. Otherwise just use the modem we have

how do I extract img?
Do I use payload_dumper?

 

[craznazn]

how do I extract img?
Do I use payload_dumper?

Yeah you can do that, or dd works just as well

 

[Libra420T]

OK so I unlocked my second LE2127 flashed global 11.2.2.2, then local updated to full global 11.2.4.4 and still lost my service (tmo modem). So definitely a 1+ update bug . flashing tmo modem now

 

[craznazn]

You have to flash the TMO modem after every ota. Technically not a bug, it's not designed to work and this workaround is required

 

[Libra420T]

You have to flash the TMO modem after every ota. Technically not a bug, it's not designed to work and this workaround is required

Is this a OP9 series issue? I've never had to do this with 7 or 8 series from Tmo to Global...

 

[craznazn]

Is this a OP9 series issue? I've never had to do this with 7 or 8 series from Tmo to Global...

It's an OP9 Pro issue afaik, doesn't affect regular OP9

 

[Libra420T]

It's an OP9 Pro issue afaik, doesn't affect regular OP9

Nodoubt, personally I don't mind flashing images manually, ever since I switched to OP 4 years ago....

 

[jkt97401]

I searched this thread and it seems nobody has encountered the issue I have haha. When sending the fastboot command "fastboot oem get_unlock_code" it comes back with this error
"FAILED (remote: Command not supported in default implementation)

I am SIM unlocked and OEM Unlocking as well as USB Debugging are enabled within the developer settings. I am using the latest Fastboot directly from google.

Any help is appreciated!


Edit: I was able to figure it out on my own. The fastboot drivers didn't want to stay installed for some reason, I had to reboot Windows with driver enforcement off and manually select the oneplus adb/fastboot drivers for installation. Super strange, but thought I'd leave this here in case any poor souls in the future run into the same issue.

 

[didymus]

Does this mean it can be turned into International mode ? I thought there was a modem issue.

 

[badazzbubbanc]

They gave me a temporary unlock but I still can't toggle the oem unlocking button its greyed out. Am I doing something wrong.

Ask the dude he did mine second device he unlocked for me and it's was really quick to

 

[DeathCite]

fastboot oem get_unlock_code
returns this error

FAILED (remote: 'Command not supported in default implementation')
fastboot: error: Command failed

Any help is nice

 

[craznazn]

3 posts above yorus...

How To: Unlock the T-Mobile Bootloader

Hello all, this is a quick and simple guide to unlocking your T-Mobile locked bootloader. Just a reminder: unlocking the bootloader will wipe your data. The instructions here will apply to all T-Mobile OnePlus devices. Unlock your SIM. Some...

forum.xda-developers.com

 

[skleveno]

I have latest OnePlus driver and adb and fastboot. PC detects the in2017 and I can go in to adb and see the device, reboot to another menu etc. However when I first got into adb and type the fastboot oem get_unlock_code it just hangs and says waiting for device..

 

[jwidel]

I have latest OnePlus driver and adb and fastboot. PC detects the in2017 and I can go in to adb and see the device, reboot to another menu etc. However when I first got into adb and type the fastboot oem get_unlock_code it just hangs and says waiting for device..

you need google drivers and fasboot adb and one plus drivers. adb devices to verify connection then adb reboot bootloader. once it boots to bootloader menu. do fastboot reboot bootloader or hold your volume down+up+power same time and it will boot to fastboot, your better off to convert to eu firmware. if you do root just use the AA boot.img to flash in magisk. unless someone has the stock boot,img for tmobile yet. i successfully rooted tmobile and converted with no problems. but **** happens,

 

[jwidel]

you need google drivers and fasboot adb and one plus drivers. adb devices to verify connection then adb reboot bootloader. once it boots to bootloader menu. do fastboot reboot bootloader or hold your volume down+up+power same time and it will boot to fastboot, your better off to convert to eu firmware. if you do root just use the AA boot.img to flash in magisk. unless someone has the stock boot,img for tmobile yet. i successfully rooted tmobile and converted with no problems. but **** happens. i havent had to unlock my bootloader in a month but i think you also have to fasboot flash unlock then fasboot get oem unlock

 

[Ju5t3nC4s3]

The device needs to be Sim unlocked before you can even attempt to bootloader unlock.

This is not true, i have decovered a bypass. I have a way to flip the oem-unlock switch and you dont even need to enter the Dev options. And you can do the fastboot oem get_unlock_code. And get all the info. I located the bit that needs fliped. And this can be added to a msmdownload tool . So all you need to do is flash and the switch is already flipped. Even if you are simlocked.

 

[FizzyAps]

This is not true, i have decovered a bypass. I have a way to flip the oem-unlock switch and you dont even need to enter the Dev options. And you can do the fastboot oem get_unlock_code. And get all the info. I located the bit that needs fliped. And this can be added to a msmdownload tool . So all you need to do is flash and the switch is already flipped. Even if you are simlocked.View attachment 5424725

So you added it the msm tool

 

[Libra420T]

This is not true, i have decovered a bypass. I have a way to flip the oem-unlock switch and you dont even need to enter the Dev options. And you can do the fastboot oem get_unlock_code. And get all the info. I located the bit that needs fliped. And this can be added to a msmdownload tool . So all you need to do is flash and the switch is already flipped. Even if you are simlocked.View attachment 5424725

bro! we need to talk....
Pm sent

 

[sin-cal]

Hello all, this is a quick and simple guide to unlocking your T-Mobile locked bootloader. Just a reminder: unlocking the bootloader will wipe your data. The instructions here will apply to all T-Mobile OnePlus devices.

1. Unlock your SIM. Some options here
   1. Finding a sympathetic rep to unlock your device. I used the I'm a developer and need the device unlocked for work purposes and took 2 agents before I got mine unlocked.
   2. Finding an awesome XDAer who has the capability to do it, such as https://forum.xda-developers.com/t/...ng-service-oneplus-samsung-google-lg.4231597/ (never used this service, just an example but he seems active and still unlocking)
   3. Paying a (trusted) 3rd party service. I never used them, YMMV
   4. T-Mobile's official policy of waiting 40 days and paying off any balance on an EIP.
2. Toggle OEM Unlocking in Developer Options.
3. Jot down your IMEI with *#06#
4. Reboot the device to bootloader. You can do this via ADB or advanced reboot options in Developer Options.
5. On a computer with latest fastboot and OnePlus drivers installed, run:
   

   fastboot oem get_unlock_code

6. Fill out the unlock application on OP's site: https://www.oneplus.com/unlock_token You should have all the necessary information to fill it out now.
7. Wait for the unlock application to be processed. It can take up to 2 weeks, or even longer on a new device. You can enjoy your still-locked OP9P for now.
8. Once the unlock application is processed, download the unlock file from the unlock site above, save it (as an example, I saved it as unlock.bin)
9. With your device in bootloader again, run:
   

   fastboot flash cust-unlock [path/to/unlock.bin]

   In my example, from the CWD as the unlock.bin file, I would run

   fastboot flash cust-unlock unlock.bin

10. Unlock your bootloader with the command:
    

    fastboot oem unlock

Congrats, your OnePlus device should now be unlocked!

I just wanted to reply and Thank you for providing this. I spent a few hours today trying to troubleshoot getting the unlock code from the phone using a cmd string that was incorrect that oneplus unlock instruction provided. cd “root directory ”> Command: fastboot.exe oem get_unlock_code "" <<< That is what was provided, It brought back an error. Again, Thank you!!!! Unlock submitted and awaitin approval.