okay so i have a sprint HTC hero. iv had it since like day one and i bought it off of a guy on the streets. so my 2 year plan was not extended or anything. in june my sprint contract ends and im able to leave or upgrade. should i.. A. stick with sprint and keep my hero b. stick with sprint and use my upgrade and get a new sprint phone. c. get rid of sprint, go to AT&T and get an iphone.