um virgin mobile maybe?metro pcs has unlimited everything for 35 dollars per month.no contract but the phones are expensive because the bills be so cheap.like the first razor they came out with is like 229 dollars.but if you went too tmobile you could get it for free for signing a contract
Cricket is the cheapest I've heard of but they've just started and don't have nation wide coverage so romeing is EXPENCIVE and they only cover major citys. Alltell is pretty cheap too but isn't good if you live in the boonys.
I used to have Alltel and now I have AT&T(AT&T= NOT CHEAP!! lol), but I here people say that Cricket (sp?) is the cheapest