I went to use my personal hotspot today and found that the switch wasn't available to turn it on and off. It's been working fine since I set the iPad up on AT&T's new $20 UDP. I then goto Cellular Data then scroll down to Set Up Personal hotspot. That directs me to visit the http://www.att.com/personalhotsots . I tried doing that but it's a dead link. Chat is currently less than helpful with something I think should be an easy fit. Has anyone else had this problem?