AT&T has launched its new myWireless Mobile application for the iPhone. AT&T myWireless Mobile enables U.S.-based iPhone users to view and pay their bills, view voice minutes and data usage, and add or remove features from their account. The app requires the user to have an active AT&T Mobility account that is registered for online account management and does not support Premier business or prepaid accounts; users can sign up at att.com/mywireless.…