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[Guide] OnePlus 6T [Fajita]: Unlock | Flash TWRP | Root | Nandroid & EFS Backup !!

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Senior Member
May 28, 2012
I don't know why you rollback to A9, with this version you will be on OOS 10.3.8.
By the way, if know you are on 10.3.8 with bootloader unlocked, you only have to follow steps I wrote above:
1. Boot on TWRP: fastboot boot twrp-3.5.2_9-0-fajita.img
2. Flash OOS ( download ) and TWRP
3. Reboot to Recovery
4. Flash OOS and TWRP again
5. Reboot to Recovery
6. Flash ROM and TWRP
7. Clean cache
8. Format data
9. Reboot to system
Oh thanks.
i missed that msm version i guess downloading at the moment


Senior Member
Jan 4, 2012
OnePlus 6T

Can i:
1.go to 10.3.8 using MSM and OTA updates
2.Follow your instruction but instead of flashing 10.3.12 OOS can I flash OOS11?

think it will work?
Also if anyone tries it please let me know?? As I might try flashing on A11 today. I really want to use my 6T with everything installed and not just an un locked bootloader. been reading and searching for over a month.


Feb 8, 2013
Had a big scare when I unlocked the bootloader and it was boot looping to recovery. It would be nice if your guide was a little more clear that you can't keep your pre-existing setup when you unlock the bootloader. This is pretty unusual compared to any other phones I've had. I was very relieved to find that I could return to my system after re-locking the bootloader.

I guess I won't be getting root since it's impossible to do this without wiping everything.


Senior Member
Sep 28, 2010
OnePlus 6T
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New member
Oct 5, 2021
Hello, i have an bootloader unlocked oneplus 6t at 10.3.12.
I want to root the phone which step shpuld i start from so that i dont loose my data.

Thank you


Senior Member
Nov 26, 2011
OnePlus 6T
OnePlus 7 Pro
Sounds like you need the MSM Download Tool, sometimes you can force your phone into Fastboot mode after a Qualcomm Crash. From my experience even if you are able to force your phone into Fastboot you may still need the MSM Download tool after a Qualcomm Crash. This just my experience there could be a better solution, so please check it out thoroughly first. But it is always wise to have a working MSM Download Tool for problems that may arise. (Saved me many times).
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    [Guide] OnePlus 6T [Fajita]: Unlock | Flash TWRP | Root | Nandroid & EFS Backup !!

    [Guide] OnePlus 6T [Fajita]: Unlock Bootloader | Flash TWRP | Root | Nandroid & EFS Backup !!

    This Guide will not work on the T-Mobile Carrier Locked Device as it may have the 40 Day/Fully Pay off restriction set by the carrier




    Before you start, OTA up to the latest System Update available.
    Settings > System Updates > Download & Install the latest available


    Thank You all for your support!!
    Never Settle :fingers-crossed:


    Unlock & Rooting OnePlus 6T would give you additional benefits like you can install special apps, Flash Custom ROMs & Custom Mods, you can streamline your phone performance and many extra features. The real performance of an Android smartphone can only be unlocked once it is rooted.

    Rooting this device is actually quite a simple and easy process. Before you begin, it is recommended that you at least try to understand what each part of the process will do. Although this guide will elongate each step in order to show all of the details, the method used can be broken up into 3 main steps: ​

    1. Unlocking the Bootloader
    2. Installing a Custom Recovery
    3. Gaining Root Access

    Each new step relies on the previous step so please follow the entire process and a basic summary of each part is described as below:

    Unlocking Bootloader​​
    Opens the door to the internal memory of the device to be written on to. This allows you to flash images onto the main partitions of the phone.​

    Installing a Custom Recovery​​
    A custom recovery is flashed onto the recovery partition of the device and overwrites the stock recovery that exists by default. Custom recoveries bring lots of functionality and give you the ability to perform wipes, install flashable zips, create full backups of your device (Nandroid backup), and various other features. An unlocked bootloader is needed to install a custom recovery.

    Gaining Root Access​​
    You can gain root by either flashing via recovery a pre-rooted custom rom, or by Flashing Magisk Zip for a system less root.

    After completing these steps your phone will be rooted, the phone will have a custom recovery installed and an unlocked bootloader. This, in my opinion, is the a practical and beneficial method for rooting your phone. It will give you some basic adb/fastboot knowledge, and should hopefully help you have a decent understanding of the entire process. This method will work regardless of any android version on the phone.

    If you are confused by anything in this guide, I highly suggest getting it clarified being before moving on. Ask your question in this thread and I or someone else will likely answer. Also we would suggest that you read over the whole thread a few times before actually doing anything to the phone.​
    Setup, Preparation & Prerequisites​​

    Basic tasks that may be referred to throughout this guide:​​
    Open Command Prompt: Press Shift + Right Click anywhere on the screen and select Open Command Window here

    Enter Fastboot/Bootloader Mode: Turn the phone off. Hold volume up + power until the "fastboot" screen appears. [Alternatively, if Advanced Reboot is enabled, you can press Reboot > Bootloader from the power menu.]

    Enter Recovery Mode: Turn the phone off. Hold volume down + power until the "OnePlus Logo" screen appears. [Alternatively, if Advanced Reboot is enabled, you can press Reboot -> Recovery from the power menu.]

    ADB and Fastboot Drivers Installation​
    1. Download & Update OnePlus 6T Drivers From Here
    2. Download & Update Fastboot and ADB Binaries/Drivers from Here

    3. Run the .exe file downloaded from above as Administrator.
    4. Press 'Y' every time the installer asks for.
    5. Continue Driver Installation.

    Now, ADB and Fastboot have been installed on your PC and should be Working as desired.

    Things To Remember​
    Show File Extensions
    Open a command prompt window and run "Control folders" (without the quotes). Go to the View tab and uncheck the "Hide extensions for known file types" option. This will help avoid confusion when renaming files.

    Ensure that your phone has at least 60% battery remaining, and that your PC is plugged in and wont shut down spontaneously during the process. The procedure doesn't take very long , but its best to have enough charge in case something goes wrong.

    Backup (Optional)
    Unlocking the bootloader will/should completely wipe all data from the device. This includes apps, settings and even the contents of the internal sdcard (pictures, music, etc.). Copy all important files off the phone onto a PC or upload them to a cloud.

    USB Debugging
    On your phone go to Settings > About phone > Tap on Build number 7 times. This will enable Developer options. Now go back to Settings > Developer options > Enable USB debugging

    Enable OEM Unlocking
    On your phone go to Settings > Developer options. Then enable the 'OEM Unlocking' option. Also make sure that from now on, OEM unlocking option is enabled before you reboot as sometimes, it might get disabled itself.


    Enable Advanced Reboot
    On your phone go to Settings > Developer options > Enable the 'Advanced Reboot' option.

    Unlocking Bootloader​

    Turn the phone off. Then boot it into fastboot mode by holding volume up + power or select reboot to bootloader if advanced reboot is activated via developer options. The phone will display "fastboot" text indicating that it has successfully entered fastboot mode.

    Plug the phone into your PC, then open a command prompt window on the desktop (Shift + Right Click -> Open Command Window here) and type:

    fastboot devices

    This command will list the connected devices. If your phones serial number shows up you are good to go and may continue. If the phone is NOT listed this indicates that your drivers are not installed correctly. In order for you to continue you must fix your drivers so that your phone is listed under fastboot devices.

    If the phone has been recognized by the command above, proceed to unlocking the bootloader with the following command:

    Remember this Step will WIPE EVERYTHING off the phone so Backup all your Data

    fastboot oem unlock

    You would be greeted with a Unlock Bootloader Warning page, Hit the Vol button to select Yes and turn it Blue and Hit the Power Button to Execute the selection

    Your device will reboot, show you a Secure boot warning, reboot into stock recovery and wipe all data. Once done, your phone will reboot into the OS.

    Please continue and follow the next post to install Custom Recovery
    Flashing TWRP Recovery


    Official TWRP | TWRP Thread | Credits @mauronofrio


    Wait until the phone has fully booted up into android, then adjust the following settings on the phone:

    USB Debugging
    On your phone go to Settings > About phone > Tap on Build number 7 times. This will enable Developer options. Now go back to Settings > Developer options > Enable USB debugging

    Enable OEM Unlocking
    On your phone go to Settings > Developer options. Then enable the 'OEM Unlocking' option and make sure that from now on, OEM unlocking option is enabled before you reboot. Sometimes, it might get disabled itself.

    The OnePlus 6T uses the newer AB partition scheme first introduced on the Pixel 1. As such there is no recovery partition. Instead, the recovery is part of the boot image. You will temporarily boot TWRP to perform and later perform a more permanent TWRP installation.

    Download all the files, place Magisk & TWRP installer zip on Device Internal Memory and TWRP img on your PC

    Then boot it into fastboot/bootloader mode by holding volume up + power or selecting the reboot to bootloader via advanced reboot options.

    Open a new command prompt in the same location and run the following commands:

    fastboot boot twrp img name

    You will temporarily boot into TWRP

    Now in TWRP, tap on Install and browse to the zip and install it (the zip will probably be in /sdcard/Downloads). TWRP will now be installed to both slots. TWRP is now installed.