G935F 8.0 reset frp not done ?

salem

Operation: Reset FRP UFS
Selected model: SM-G935F
Selected port: COM5 USB Serial Port
Software version: 33.2

Hold 'Vol down' and press 'POWER ON' for 2-3 seconds
Checking phone at COM5 OK
Phone detected, do not release 'Vol down'
Reading data from phone... OK
Release 'Vol down' now
Comparing selected model... match (G935F)
Setup connection... OK
Reseting FRP... error (1)

Done with Samsung Tool PRO v.33.2