We have a relatively simple 2-phone family plan. The AT&T plan that's most like our Alltel plan is less expensive, by about $20 a month.

2 iPhones, 700 minutes, 1500 texts per phone, the $15 smartphone plan (rather than the 2gb - to save $) is $129 before taxes.
Alltel couldnt come close to that rate for me - thats why I'd never gotten a smart phone.