I use less than 150MB a month. AT&T insists I pay for 20-times that or I can't upgrade from iPhone 4. Crappy service for double the price. Twice today I was told I could keep the plan, only to be rejected later. These greedy mega-corps keep eliminating the lower plans! Trickle up economics! I would wait and buy unlocked, but I can't even use my old micro-sim, right?