Unless im overlooking something this looks like a pretty easy fix! Offer them the gophone 60.00 smartphone plan. I took a glance at alltels website and there prepaid starts at 45.00 for just talk & text with data starting at 15.00 extra for just 250 mb's and 2 gb which is what you would get with ATT is 25.00 extra. So again whats the major prob?? Offer them gophone! Same Att nationwide network as postpaid gets. Which is great. I have it & am satisfied using an unlocked Tmobile phone right now. Unless the Alltel customer only wants talk & text, Well At&t GoPhone plan is only 5.00 more. Again I think there are more serious issues.. If they really make a stink they could just match the price.