HT1937: iPhone: Wireless carrier support and featuresLearn about iPhone: Wireless carrier support and features
Currently Being ModeratedDec 28, 2012 11:12 AM (in response to Adela5896)
no way to trade unless you sell this one and buy a att one
Currently Being ModeratedJan 2, 2013 9:00 AM (in response to Adela5896)
You can trade-in through a service like NextWorth. They accept used electronics and give you cash in return. Find your device here http://nextworth.com/search/1/cat/iphones/sub/iphone_4/ and answer a few condition questions to receive your price quote.
Currently Being ModeratedJan 2, 2013 9:02 AM (in response to Adela5896)
RadioShack will give you a decent deal to trade it in and buy a new AT&T phone from them. Not quite as much as some on-line services will, but you can do it on the spot in the store.