Phone connect successfully
Updating bootloader KIRIN960_A7.0_V3..
Initializing remote service connection
Writing XLOADER partition..
XLOADER partition has been written successfully
Writing UCE partition..
UCE partition has been written successfully
Writing FASTBOOT partition..
FASTBOOT partition has been written successfully
Bootloader Update successfully
Rebooting to fastboot mode..
Searching Fastboot devices...
Device Model: VTR-L29
System: VTR-L29 9.1.0.252(C636E2R1P9)
Updating bootloader KIRIN960_A7.0_V3..
Initializing remote service connection
Writing XLOADER partition..
XLOADER partition has been written successfully
Writing UCE partition..
UCE partition has been written successfully
Writing FASTBOOT partition..
FASTBOOT partition has been written successfully
Bootloader Update successfully
Rebooting to fastboot mode..
Searching Fastboot devices...
Device Model: VTR-L29
System: VTR-L29 9.1.0.252(C636E2R1P9)