Before you begin:

1. Back up your important data as the process might result in data loss.
2. Download: Download the correct firmware for your OnePlus device from a trusted source. Ensure it matches your device’s model number.
3. Make sure your device has sufficient battery to prevent any interruption during the flashing process. (at least 50%).

Flashing Firmware:

1. Download Necessary Files:

   • Obtain the appropriate firmware files for your OnePlus 6T. These files usually come in a package with the MsmDownloadTool.
   • Download and install the OnePlus USB drivers on your computer.

2. Extract Firmware Package:

   • Extract the firmware package you downloaded to a location on your computer.

3. Install MsmDownloadTool:

   • Open the extracted firmware folder and look for the MsmDownloadTool executable file. Run this file to install the tool on your computer.

4. Boot Your OnePlus 6T into EDL Mode:

   • Power off your OnePlus 6T.
   • Connect the device to your computer using a USB cable.
   • Press and hold the Volume Up and Volume Down buttons simultaneously, then press the Power button. Keep holding all three buttons until the device enters Emergency Download (EDL) mode.

5. Open MsmDownloadTool:

   • Run the MsmDownloadTool on your computer.

6. Load Firmware:

   • In the MsmDownloadTool interface, click on the “Target” button and select the firmware file or folder where you extracted the firmware.

7. Start Flashing:

   • Click the “Start” button in the MsmDownloadTool to begin the flashing process. The tool will start flashing the firmware onto your OnePlus 6T.

8. Wait for the Process to Complete:

   • The flashing process may take some time. Do not disconnect your device during this process.

9. Complete Setup:

   • Once the flashing is complete, your device may automatically reboot. If not, you can manually reboot your OnePlus 6T.

Remember that these instructions are based on general steps for flashing OnePlus devices. The exact steps might vary slightly based on the specific firmware and version you’re using. So we can’t take responsibility for these instructions. Always refer to the official documentation and resources for your device and tools.