hi everbody,i buoght my iphone from craigslist the guy told me its AT&T unlocked,but as soon i activated my t mobil sim card phone never worked i went to appel store they told me its locked from a venzuelan company or network,phone doesnt respond to jailbreaking either i dont know what to do,maybe its blacklisted if so how can i know?and is it possible to unlock it?i found the guy sold it to me i called the cops they didnt do anything.because i have no prouf that i bought it from him cuz we meet ina public place and i paid him cash.please help