are you sure you cant use it?
some carries will work in different zones like tmobile in the us works with tmobile in the uk if i remember correctly

Can some carrier not perhaps flash it for you? That's what they call it here in the States anyways - the process of placing a new carrier's software on the device in order to make it compatible on their network. You know, if you wanna keep it!

How big is it? Condition? D: