Help A035G Protocol : Failed to handshake with device!

[steve-2]

ERASE FRP Selected Platform : Tiger T606_64_Bypass
Connect Testpoint or hold VOL DOWN! Instruction here!
Waiting for device... COM78 (SPRD U2S Diag)
USB : USB\VID_1782&PID_4D00\6&16EA93D0&0&2
Initializing loader... OK
Protocol : SPRD3
Sending payload... OK
Sending auth data... OK
Sending preloader1... OK
Sending preloader2... OK
Booting loader, please wait... FAIL
Protocol : Failed to handshake with device!
Protocol : Failed to handshake with device!
UNLOCKTOOL 2023.08.18.0
Elapsed time : 44 seconds