I purchased an iPhone 4s during a Verizon deal when they came out, I had the phone awhile but dropped my contract due to all the fees and hassle of finding the root of it all, paid the fine and have since used my phone for apps and internet use, which doesn't bother me much considering I don't care for having a cell phone. But I recently had a situation in which I needed a cell phone and didn't have it. I have a tech friend who told me you can unlock an iPhone and use it under a different carrier? Researched it a bit, had him research it more for me, got a sim card for a prepaid service and have had that same sim sitting in an envelope for almost a year now, he now tells me if I unlock my phone the phone itself will be black listed and I can never use it again. Is this true or is he just misinformed? I own the phone outright, I don't think it's totally fair for it to be useless now.