Iphone wont work on Vodaphone even unlocked. Vodaphones network is incompatible with iphone. vodaphone is wcdma and iphone is gsm only for now. though there is a verizon version coming out later this year that will work it may not even need to be unlocked.
I have a LG shine from a at&t plan I recently had, I now want to get a go phone can I use the sim card that is already in the phone or do I need to buy an new phone from walmart that has a new one in it.