Please, put your device in OFF mode (use Hardware Test Point) and insert USB cable
Waiting for MTK port :Detected (COM53)
Handshaking: start
Handshaking: OK
HW Chip: MT6761
HW version: ca01
SW version: 200
HW sub version: 8a00
Sending DA Loader: OK
SWITCH USB FULL SPEED
USB FULL SPEED: OK...