According to Engadget, AT&T will undergo a shift in policy with regards to unlocking out of contract iPhones. Their source says that starting Sunday, customers with an account that is both in good standing and out of contract will be able to request a carrier unlock code for their iPhone.
This means that your iPhone could be used with any microSIM card. One would think this would apply to your old iPhone, so it might be time to dust off that iPhone 3GS or whatever lurks in your desk drawer. Free iPhone unlocks for everyone!
An AT&T representative wouldn’t confirm nor deny this report, other than to say that “a policy change concerning iPhones” would happen this Sunday.
UPDATE: AT&T has issued the following statement to MacRumors.
Beginning Sunday, April 8, we will offer qualifying customers the ability to unlock their AT&T iPhones. The only requirements are that a customer’s account must be in good standing, their device cannot be associated with a current and active term commitment on an AT&T customer account, and they need to have fulfilled their contract term, upgraded under one of our upgrade policies or paid an early termination fee.