Straight Talk to AT&T GoPhone
I'm thinking of purchasing an iPhone 5s 2nd hand The new phone is AT&T through Straight Talk and have the following questions:
1. Can I bring this phone (no sim card) to an AT&T store and register it for a new Go Phone account & number (no porting needed)?
2. Does the phone need to be unlocked to move the service from Straight Talk to Go Phone?