AT&T has announced the launch of Aio Wireless, a new prepaid cellular brand. Aio Wireless offers a number of devices under no-contract plans, including the iPhone 5, iPhone 4S and iPhone 4. The iPhone 5 is being sold for $650. It is available with the Aio Smart plan, featuring unlimited talk, messaging, and data with high speed access for the first 2GB for $55 a month, or the Aio Pro plan, which offers the same features as the Smart plan, but with high speed access for the first 7GB of data for $70 a month. Aio Wireless is available now in Houston, Orlando, and Tampa — the service will make its way to additional U.S. markets during the next year.