I've tried to find an answer to this and apologize if it is too simple, but I'm moving to Africa and ordered an upgrade IP4 to replace my IP3 (with AT&T). I want to activate my IP4 so I can unlock it and jailbreak it for use in Africa, but I need to continue using my IP3 while still here in the USA (another 2 weeks). If I activate my new IP4, will my old IP3 no longer be usable since my contract is only for one data plan and I bought the new IP4 as a replacement? Thank you for your help!