iPhone can't access internet/iMessage My wife's iPhone 5 is exhibiting strange behavior:


It isn't receiving iMessages.
It can't access the internet.
It can send texts, but they come across as plain SMS instead of iMessage.


I'm sitting next to her with an identical phone on the same plan, and mine is working perfectly.

What's causing this?  (Or, what should I google to find more information?  My searches so far have proven fruitless.)
Try rebooting the phone by holding both buttons simultaneously until the Apple logo appears. 

Restarting iOS will fix a lot of problems (as does restarting any computer) and should usually be tried as a first resort.