oppo r11 failed to reset
 

FACTORY RESET Selected Model : Oppo R11/R11T (Global)
Code Name : CPH1707
Operation : Factory Reset [1]
**Authenticating... OK
**Retrieving data... OK [246.3 KiB]
Initializing data... OK
Searching for HS-USB QDLoader 9008... COM102
**Connection : USB 2.0 High-Speed
**USB Driver : [Qualcomm Incorporated] qcusbser - Version : 2.1.2.0
Connecting to device... OK
Handshaking... FAIL
[Sahara] Reading Hello - Failed to handshake with device PBL!
Trying to connect to FIREHOSE Mode!
Validating programmer... FAIL
UNLOCKTOOL 2021.11.29.0
Elapsed time : 16 seconds