jet a quick question. I'm gonna get an unlocked iPhone and was wondering which one to get. The 3g one is pretty expensive on ebay whereas I cud prob pick up the old one for pretty cheap. Which one will I get? Is there really that much difference between the 2 models? Personally, I'm not a fan of the new plastic back. Any suggestions? Will the old version still be able to get all the updates that the 3g version gets?