My sister has an old blackberry curve or im not sure what it is its just a really old blackberry. She wants to add a pay as you go plan to it because it doesnt have service. It doesnt have a sim card. So how do i get a sim card and add pay as you go plan to her phone? Is there a way to just buy a sim card and add service without buying a new phone? If not should she just buy a free gophone and then put the sim that comes with the new one in the blackberry? She just wants the simple 25 cent per miniute 20 cent pet send/recieved message plan. Will they know that its in a blackberry and charge us for the pda plan? Will they terminate the sim or charge us extra etc. Thanks. Please dont say just get a contract or throw out the blackberry!