Cost of breaking an ATT iPhone 4S contract to buy iPhone 5?

[bboyredcel]

Since Apple doesnt offer the ability to purchase an AT&T iphone on their website WITHOUT extending your contract, im thinking of creating a new account during the process and then canceling the day that i pick my phone up at the local store (immediately after purchase). According to their TOS they'll charge me the difference between the $199 and the $650 for an unsubsidized phone (aka they'd charge me an additional $450 on top of the $199 i already paid). Which is exactly what i want to pay. Anyone ever do this? Its within the 30 days so there is no ETF; and within 3 days so there is no activation fee. So, im wondering if my calculations are correct here.

via at&t's TOS:

Your Termination Rights. Within the first 30 days after service activation, you may terminate your Agreement for any reason and not be required to pay an ETF. If you terminate within three (3) days of accepting the Agreement, AT&T will refund your activation fee, if any. However, you agree to pay AT&T for all fees, charges, and other amounts incurred and owed under your Agreement, and you agree to return to AT&T any Equipment you purchased from AT&T in connection with your Service Commitment. If you fail to return this Equipment, you will be charged the difference between the amount you paid AT&T for the Equipment and the amount you would have been charged for the Equipment had you not agreed to a Service Commitment. AT&T also may charge you a restocking fee for any returned Equipment. Some dealers may impose additional fees.