Esto encuentro en Doctor SIM
1 -. The phone reboots or does not request the code
It is advisable to restore the phone to its factory settings.
It is always advisableto make to do this, mainly so that the process used to unlock the phone is done properly.
It is also advisable to leave the phone on at least 15-30 minutes before entering the code.
¿Puedo restaurar a como vino de fábrica mi smartphone aunque haya metido una ROM?