I recently purchased a Samsung Galaxy S3 on Craigslist. When i tried to activate it at Best Buy, they said the phone was not able to activate under my name because it is still under an account. Please help. Not sure what to do. I want to know if there's any way i can remove the current owner and register the phone in my name. unfortunately, the seller isn't being responsive and it seems a little sketchy but i LOVE this phone and would like to activate it. Please help!