I recently bought an old Samsung flip phone off of a friend just for the heck of it. The phone is locked to Rogers but I would like to be able to use it on MTS. I tried putting my MTS sim card in the phone and it asked for a PIN when I turned it on. I called support and got the PIN number for my sim card and entered it into the phone. The problem i'm having is that as soon as I enter the PIN number the phone freezes and I can't do anything. The only way I can unlock this phone to use it with MTS is if I can get past this sim card lock. Any ideas on what I'm doing wrong? Or is it just not going to work for me to use this phone?