The phone will work just fine w/ your current SIM card on PrePaid.
A couple yeras ago I bought a Motorola V3 off of Ebay, when it was just a contract phone, and I put my GoPhone SIM card in the phone and it worked perfectly. Now I need a new phone, and I dont have a contact and Im not going to get one, and I was wondering if I could get a Pantech Matrix off of Ebay and use my SIM card in the phone? Would the phone still work with the GoPhone SIM card? Please help!!!