Hi everyone, I am new here and new owner of Iphone My Iphone is 3G 2.1 16 GB .. its supposed to be Unlocked as Apple website says, however the salesman of the store refused to ensure that that the Iphone will not be locked after the update I thought that the salesman don't know anything about the product he is selling, because apple store it self says that my Iphone are not locked for a carrier until I realized that the box of the phone was opened before I purchase it why did they opened it? what did they do with my phone ? I don't know and they don't give straight answer ! It is safe to upgrade? My second question I tried to jailbreak it, I used quickpwn but I got "Firmware string error" message !