HT4623: Update your iPhone, iPad, or iPod touchLearn about Update your iPhone, iPad, or iPod touch
Currently Being ModeratedOct 9, 2012 11:09 AM (in response to johntd5)
Try turning Personal Hotspot off and then back on in Settings > Personal Hotspot or Settings > General > Cellular > Personal Hotspot.
If that doesn't do it, this Apple doc might help ya out -> iOS: Troubleshooting Personal Hotspot
Currently Being ModeratedOct 13, 2012 11:43 PM (in response to johntd5)
I have an iPhone 5 with iOS 6. I toggled personal hotspot "on" this evening, but had problems with my laptop. I then returned to my personal hotspot under Settings and it was gone! I rebooted my phone and it was still missing. With some help from the Apple Support Communities, which wasn't terribly clear, I went to Settings/General/Cellular and found Personal Hotspot was there and toggled off. I toggled it on and then returned to Settings and there it was again. Weird! But at least it is back and now I know where to go if it disappears again.