AT&T has officially launched Aio Wireless, an awaited MVNO carrier offering cheaper prepaid plans. Aio is offering Basic, Smart, and Pro tiers for phones, all of which including unlimited calling and texting. Basic costs between $35 and $40, and includes 250MB of data. Smart costs $55 per month for 2GB, and the $70 Pro plan ups the data cap to 7GB. Once a cap is exceeded, Aio begins throttling speeds. A special $15 tablet plan provides 250MB of data.