I bought my son a new Y5 and he used his existing SIM to unlock it. In the process he forgot the PIN number he created. Because he has not yet signed in his google account on this phone he can't use that account to set up the phone. He can only access the set up menu and gets stopped at either the PIN stage or Google account. I think he has also factory reset the phone when he realised what he has done but that hasn't helped. Is there a way he can get this back on track?