Personal hotspot only works sometimes
I have the iPhone 5 (iOS6) on AT&T with their new 'Data share' plan which allows me to tether my data. The problem is that it only works sometimes! There does not seem to be any reason why it only works about half of the time that I turn it on. And when the wifi hotspot doesn't work, neither does the USB or Bluetooth tethering.
When it doesn't work, I try restarting my phone and even that doesn't fix the problem.. it just somehow fixes itself after a day usually which is very annoying because I depend on the hotspot feature a lot.
Does anyone else have this problem or know how to fix it? Or is there another app I can install to enable it?
Thanks,
John
iPhone 5, iOS 6, Carrier - AT&T