I've found an iPhone in a reasonable price and i am thinking of buying it. i've contacted the seller asking of what firmware it is, if it is jailbreak, unlocked etc. He answered me: "It is activated, jailbreak and unlocked in the most recent firmware 1.1.2" I am going to meet the seller in person and make the exchange... If I insert my sim and the iPhone can make a call is it OK? Should i know anything more?