An average iPhone 4S monthly bill is around $99. However, this is exclusive of additional charges such as regulatory cost recovery charge, federal universal service charge and state gross receipts surcharge which could total to around $20 increasing the bill to about $120.
5 months ago
Last edited at 6:15PM on 7/12/2013
With Sprint you can get the family plan upgrade and add an additional 20 to your bill, but you get a free iPhone 4s but it adds 20 bucks to your plan, just cancel your current phone and use the family plan.