LTE personal hotspot greyed out on new iPad 3
I have bought new iPad 3 with iOS 5.1 from apple online store. After activated the LTE plan, the "Personal Hotspot" feature was available and everything worked well for a month. Today I note that I could not choose Personal Hotspot option which is greyed out in settings.
How to fix the network issues
* On your tablet, go to Setting > General > network, turn "Personal Hotspot" off and then ON. That should make it available again.
* If it is still not working, go to turn Airplane Mode on and off.
