An internal AT&T memo obtained by AppleInsider, and a similar internal Rogers memo posted on a Canadian iPhone forum, describe a special version of iTunes that will be used for the in-store “unbricking” process required to let customers use the iPhone 3G. The AT&T memo shows an icon for “iTunes (Activation Only Mode),” noting that “[t]his icon is for the itunes utility that will be used for unbricking iPhone 3G…