I received an iphone 4s from a family member. I reset everything and the phone is empty now. It is a verizon phone and I have upgraded the software to 6.0. The thing is what I want to do is try to use this with virgin mobile or something sort of prepaid, but everything is wiped and I dont know how to unlock it and try to get a different carrier for it. I dont have another sim card , from the videos I have watched. I currently have Virgin Mobile and I thought I would be able to use the iphone 4s since they do sell it now, i would like to use this phone now since its way better than my current one. What can I do so I can use it with a different carrier?