Okay, so i got an iphone 4 in August. The iphone 5 will probably launch sometime in Oct right?? I wanted to know if i can get an iphone 5 on my existing contract?? or will i have to wait for my current contract to expire to get new phone(at subsidized price with a contract)?? Forgive me if this is stupid but i just came to US last month as a international college student and was wondering if this would work?? Also i will be returning back to my country for vacations, so can i call at&t and get my phone unlocked so i can use it while i am there.