AT&T's prepaid offering Aio Wireless is a nice way to access the carrier's network without having to make an expensive two-year commitment. Now the carrier has announced the availability of two additional Android phones. The Moto G is available for $149.99 (though it doesn't yet appear on the site). It is joined by the ZTE Sonata 4G, which goes for $79.99. The latter, while less impressive, is an Aio exclusive in the US.