Hi
I try unlock with k770 and I have problem
this is log
Power OFF the phone, connect USB cable holding '2-5'
Connected to USB4
Device identification...OK
Sending Preloader...OK
Starting GDFS service...OK
Chip

B2020 Model:K770i IMEI:35617902014xxx CID:53 Domain:RED
OTP LOCKED:1 CID:51 PAF:1
Uploading logic DB2020:
Shutting down device...OK
Selected current certificate: A1_DB2020_53_RED
Connected to USB4
Device identification...
I try connect with 2+5 and nothing to do , problem is still

Only device identification ...
Yesterday I have this same problem with f100 and phone was dead , I repair with setool
where is problem ??
any solution ?