Ok, I really want a cell phone. So If I sign up for one year and get my phone, I've got my contract setup. When the contract expires, can I use another company's plan? I've also heard of prepaid stuff, after my contract is up can I use a prepaid service even if I don't have the same model phone as the prepaid ones(say I buy a Motorola T70 but the prepaid service uses a nokia 3360, but their regular service plans use the T70)? Can I just use phone cards instead of signing up with the prepaid service? Also When people sell phones on Ebay, do I have to use their provider?If they haven't finished their contract, Do I have to finish it if I buy the phone? It would be a great help if anyone could answer these questions for me.