I was just reading this article about the mini and at the bottom it states that even though the ipad 4 has lte the cellular version of the mini wont....I thought it did even though I bought the wifi only version.
http://www.ibtimes.com/apple-ipad-4...deliveries-currently-en-route-leading-release
http://www.ibtimes.com/apple-ipad-4...deliveries-currently-en-route-leading-release