Apple has just started accepting claims for rebates on iPhones bought before August 22. The process is very simple, as it only requires you to enter your AT&T phone number and your serial number (Found in Settings -> General -> About). You then receive a free text message containing a code which you enter on Apple’s website and you then receive the $100 Apple store credit which you can print out and use at an Apple retail location or online. The only problem I see here is for those of you who are using the iPhone off of AT&T’s network. You can fill out the rebate form here.