I just got a Iphone 3GS without a data plan. and was wondering if turning on the "Location services" for the camera and the compass used "Data" <- the kind I have to pay for =( I'm scared to turn it on and use it and rack up my bills
The phone has its own compass chip, so it doesn't need information from anywhere else. But if you don't have a data plan, then you shouldn't be charged even if it did use data. Because if it did use data, you wouldn't get any information without a plan.