=== LOG ===
Waiting For Device Connection... 
USB PORT: SPRD U2S Diag (COM7)
Port: SPRD U2S Diag (COM7)
Manufacturer: UNISOC Communications Inc.
OPEN COM PORT... OK
Waiting for server........ OK
Handshake NAND_FDL... OK
Boot version: SPRD3
CPU: Chip SC7731E
Sending payload... OK
Sending preloader... OK
Sending nand_fdl loader... OK
Read Build Prop Info... OK
 Brand: WELCOME
 Model: 15C
 Product: 15C
 Manufacturer: WELCOME
 Android Version: 8.1.0 (Oreo)
 Security Patch: 2018-10-05
 Build ID: OPM2.171019.012
 Build Date: SAT SEP 13 17:46:26 CST 2025
 Display ID: OPM2.171019.012 RELEASE-KEYS
 Fingerprint: SPRD/SP7731E_1H10_NATIVE/SP7731E_1H10:8.1.0/OPM2.171019.012/36617:USER/RELEASE-KEYS
 Build: 36617
Read Internal Storage Info... OK
USERDATA: 11.00 GB
USERDATA: ENCRYPTED
Waiting for server........ OK
Backup important partitions
  Backup persist... OK
RESET FRP... OK
Elapsed Time: 24 secs, 220 msecs