after upgrading with Virgin from a Samsung mini s4 to another Samsung phone through virgin, I haven't used my old phone for a number of months. I have got a new SIM card from virgin to start using it again so I can give it to my son, but I obviously had a PIN number to get in and I just can't seem to get into the phone now. How do I unlock the pin?
This could be difficult, if you have a gmail account that was on the phone then go to the email on a pc/laptop and the option to change the password is there, otherwise, you need a friend who can do a reset via the android system
Sorry to learn about the trouble you're experiencing at the moment, as J0hn has mentioned, if you set up the phone with Samsung Kies there's a chance you can unlock it by plugging it into your computer.
If that fails, then you could factory reset the phone, which would wipe everything currently on there. For information on how to do that just [click here].