I bought an iphone 5 through craigslist from someone who I thought was honest and he was from the military. Iphone worked perfectly I even called 611 and let them know the imei so it would tie to my account, they said ok it's on your account now. I have Att gophone btw. Then a few weeks ago I made a phone call and it said this device had been blocked but it still showed Att at the corner just not LTE. So I called Att off a landline and asked what was going on. They said the owner called and said device was reported lost or stolen. I then told them I had bought it off someone and called 611 to add the imei to my account so I was the owner and I never reported my iphone lost or stolen, then in the middle of my convo the phone died. I was without a phone for 3 days...then I called off a landline, told them I met someone on craigslist was testing phone and sim got blocked. They unblocked my sim. Everything worked for about 30 mins then again the same thing happened. I called back gave same story this time I turned cellular data off, but left service on...I haven't got cut off ever since. I haven't turned cellular data on unless I needed it then shut it right off. I've also check online for blacklist checks and it said it was clean. Someone said if you put your sim in the phone and use it it activates on your account and someone calling it in lost or stolen makes it a bad practice on Att. What can I do? What should I do?