From day one with my mini, using my grandfathered unlimited AT&T I have been able to use it on LTE as a hotspot. I don't know why it allowed me to do it but it did so I just kept my mouth shut and enjoyed it. This weekend I made the mistake of playing around with FaceTime. Of course it told me AT&T would only allow FT using LTE if I changed my plan to a "share" plan. Bam, all of a sudden my hotspot disappears. Sad face.