if i am not wrong .. the person who takes on contract are liable to pay till the end of contract .. so its not really $50..
also i think sprint uses cdma technology .. it can be reprogrammed to work on indian cdma network and need to registered.
but then you wont get any warranty ..
you get latest handset but have to be ready to take risk as nothing is cover in warranty
i have been using us phones .. no issues
Vaibhav