big probleme unlock

LG G6 not unlock 2day change driver change pc all ok but not unlock


Initializing...
IMEI: 355469082*******
Reading modem calibration
Waiting for diag serial port to appear...
Please make sure Port Check Test is enabled on the phone!
Be patient! Do NOT disconnect the phone!
Creating backup file
Creating backup...
Saving Qualcomm files.
630 files saved.
Saving special file.
896 files saved.
Saving nv items.
497 nv items saved.
Waiting for serial port to appear...
Trying to boot the phone into download mode...
Waiting for download mode serial port to appear...
Creating EFS backup...
Waiting for download mode serial port to appear...
Reading EFS partitions. Do not disconnect the phone!
EFS data saved successfully!
Starting Unlock...
Waiting for download mode serial port to appear...
Protocol failure detected
Finished at local time: [10.12.18 15:13:44]
WorkID: 45729517