1. Power off device, wait 10-15 seconds
2. Press and hold BooKey ( 1 : BOTH VOL , 2 : VOL+ , 3 : VOL- )
3. Insert cable in device!
Wait for device ...
Device Connected!
BootVersion : SPRD3
Sedning Init Boot ...
Boot sent!
Kick FDL ...
BootVersion : Spreadtrum Boot Block version 1.1
Protocol setup ...
Port speed : 921600
Sedning Flash Boot ...
Boot sent!
Kick FLASH FDL ...
FDL : Control transfered!
Boot Done!
UBOOT : u-boot-spl-16k-sign.bin
Failed to write block!
ERROR : 000000AC:AC000000FF537E00
Error : Flashing failed!
Make sure device HW is ok, check battery and cable! Try hold BootKey at whole Flash Process
Reconnect Power/Cable!