Use this for small fixes or flashing a custom recovery. Firmware Upgrade: Use this if the device is boot-looping.
If the scatter file isn't 100% verified for your specific sub-version of the MT6755, the Boot ROM (BROM) will reject the connection. Conclusion mt6755+scatter+file+verified
Once a Green Circle appears, the process is complete. Troubleshooting MT6755 Flashing Issues Use this for small fixes or flashing a custom recovery