spend the money on a Early Termination fee
^thats all you can do
you could always go for the google nexus 4, its a really nice phone that you can get relatively cheap, unlocked. since it's unlocked you could transfer the SIM card from the iphone to the nexus without any fees
iphones have different sim cards than every other phonetypical apple lol
on my iphone 3GS i could transfer my SIM to any other phone i had