No encontre nada en los foros, comparto el log muy sencillo el proceso. apagado conectar con boton de vol+y-.
FORMAT DATA Selected Platform : Tiger T610_64_2_bypass
Connect Testpoint or hold VOL DOWN! Instruction here!
Waiting for device... COM5 (SPRD U2S Diag)
USB : USB\VID_1782&PID_4D00\6&5FF1707&0&2
Initializing loader... OK
Protocol : SPRD3
Sending payload... OK
Sending auth data... OK
Sending preloader1... OK
Sending preloader2... OK
Booting loader, please wait... OK
Boot ver: Spreadtrum Boot Block version 1.1
Sending FDL1... OK
Sending FDL2... OK
Reading Serial Number... 2ULTRA3624007204
Reading partitions info... OK [73] [1024]
Dual boot-slot : B
Reading device info... SKIP [EROFS]
Erasing FRP (persist)... OK
Erasing USERDATA... OK
UNLOCKTOOL 2025.05.26.0
Elapsed time : 28 seconds
FORMAT DATA Selected Platform : Tiger T610_64_2_bypass
Connect Testpoint or hold VOL DOWN! Instruction here!
Waiting for device... COM5 (SPRD U2S Diag)
USB : USB\VID_1782&PID_4D00\6&5FF1707&0&2
Initializing loader... OK
Protocol : SPRD3
Sending payload... OK
Sending auth data... OK
Sending preloader1... OK
Sending preloader2... OK
Booting loader, please wait... OK
Boot ver: Spreadtrum Boot Block version 1.1
Sending FDL1... OK
Sending FDL2... OK
Reading Serial Number... 2ULTRA3624007204
Reading partitions info... OK [73] [1024]
Dual boot-slot : B
Reading device info... SKIP [EROFS]
Erasing FRP (persist)... OK
Erasing USERDATA... OK
UNLOCKTOOL 2025.05.26.0
Elapsed time : 28 seconds