Re: How much will it cost me to discontinue my iPhone contract?
You do not need to cancel your contract, you will need to pay full price for the new phone. Depending upon how long you have been under this contract, you might get it for less. If you leave, then your Early Termination fee is $325 less $10 for every month you have been under contract. http://www.wireless.att.com/learn/articles-resources/early-term-fees.jsp Note that you cannot cancel your contract and come right back and get the pricing as if you were a new customer.
For service or support questions including existing order status, call: Customer Support: 1-800-331-0500
Information on iPhone unlocking can be found here by copying this link into your browser: https://www.att.com/deviceunlock/client/en_US/