Republic Wireless is ramping up to offer unlimited calling/internet on a $250 Android phone for $20 a month (no contract). The catch is that you have to have wi-fi at home because the phone always tries to route over wi-fi if available. It uses the cell network when that’s not available. They’re currently in Beta so you have to sign up for a waiting list. Anyway, it could be a good deal if you want a smart phone and you’re usually near a wi-fi signal. If you’re not around a wi-fi signal most of the time, I’d avoid it.