Unclocked means a few different things. You want to ask the seller if the ESN (electronic serial number) is clean which means its not assigned to an exsisting number, stolen phone, etc. Unlocked also means where you can use the phone on an alternative carrier like swapping between Cingular and T-Mobile. If you have Verizon, make sure you get a Verizon phone, nothing else will work, I work at VZW, and i see people come in every day tryna activate phones from different carriers.