OK so ive been buying alot of iphones for awhile now trying to figure out how to get them on the sprint network accoriding to the sprint techs they wont allow you too use any other carrier on there network but i know thats a lie because i went to a tech convention and people should me there verizon and at&t iphones on sprint networks and even metro pcs. so now i want to figure out how to do this. the new iphone 4s according too all the carriers have a sim card for internation use. i have been told that if you take a sprint sim card and put it in the at&t iphone that it will work and it wont work from different kinds of people so i am looking for help please. i have my at&t iphone 4. 5.0.1 jailbroken already and unlocked but i need technical help and experiences people who have tried this before and may have done this before. thank you