My daughter has an android transform (it's on it's 'last leg') - she has been on a Sprint family plan for years. YDay she tried to upgrade to the new iPhone 4S and was told she would have to pay, not 399.00, but something like 600.00+ (this, to my knowledge is some sort of 'retail' price, I had believed nobody actually pays). Can anyone explain this? Essentially how a long term established customer can be made to keep a, basically useless phone or pay a crazy price (as her only upgrade option)?