Buy my Iphone on Craigslist. The seller seemed to be a good person, he said that was selling the phone because another person sold the phone to him as a ATT but turned out to be for T-Mobile phone. Within a month the phone got no signal and whem I get in touch with my carrier and they said phone was black list and only the previous owner can fix this. Well the previous owner Was not answering his phone number anymore. Now I lost $700 on an Iphone that is black list. So it’s possible to be unlocked and use it again? Help please.