As it says in the description, when doing the process with the box z3x, it is frozen on the lock screen with many processes that stopped working, such as a crash.
Log:
Operation: Reset FRP/React/EE
Selected model: SM-G920F
Software version: 43.9
Searching Samsung USB Flash interface... COM6 detected
Setup connection... OK
Reading PIT from phone... OK
Searching FRP lock... OK
Erasing FRP lock... OK
Reset done
For complete reset FRP, goto 'Backup and reset' and make 'Factory data reset'
Done with Samsung Tool PRO v.43.9
And if i try to reset it via recovery mode, it will start again with the samsung account locked.