Unlocking BB 5.16.05 and/or using data

Hi, I currently have a 32GB Iphone 3GS with IOS 5.1 and a BB of 5.16.05 and a serial xK1131xxxxx, I am using a prepaid GoPhone sim card in this and was wondering if there is either A) a way to make the data network work with this sim (I've already tried the unlockit APN app with no luck) and if not, would it be possible to change to the Ipad baseband instead?