I bought a boxed IPhone 4S from craigslist. I later found that it was not activated at all. I tried to use my micro-sim (from other IPhone 4S) but it wont allow me to activate with my sim card and is expecting the original sim card that came with the IPhone. The person took the sim card with him and I neither can contact him nor have any information of him.

Any help would be highly appreciated.