After the upgrade is complete, click Restart phone. Go to Settings -> System -> System Updates -> Tap the gear icon on top right corner -> Local upgrade -> Then select the downgrade file and install it. Copy the Rollback package to the phone storage. If you have any queries let us know in the comment section. Download the latest ROM upgrade zip package from the specified server. So there you have it the complete guide on how to unbrick OnePlus 7T using MSM Tool. Even if your device gets bricked, you know how to unbrick it. Now you can customize your OnePlus 7T without worrying about bricking your device. In the tool you will find SMT Download mode, You need to stay away from this option as this can remove IMEI of your phone and it can degrade the Widevine. If the phone ends up on ‘Param pre-processing’ error then you need to install the correct Qualcomm HS driver given in the above note. It is an essential tool for OnePlus users. Using the MSM Tool you can roll back to an older version on your OnePlus 7T. Step 8 – Now your OnePlus 7T is unbricked and working. The device will auto-reboot into the system.
Step 7 – Wait for about 5-6 minute and the phone will be fixed. Once you see the device is connected click on Start to unbrick the OnePlus 7T. Step 6 – To check if the device is connected or not click on the Enum button. Step 5 – (Skip for T-Mobile variant) Click on Target drop-down button, then select ‘O2’ if you want to flash global firmware or select ‘India’ to flash Indian firmware. Step 4 – Run the MSM Tool.exe that you downloaded earlier. Step 3 – Now connect the device to your computer while OnePlus 7T is in EDL mode.
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