iOS 8.1.2 on iPhone 4s - has bricked my 4s
I just upgraded to 8.1.2 on my iPhone 4S and now all my text messages have vanished, I can't send or receive text messages, and I can't make phone calls. What the ****? When I punch in a phone number or tap a contact in my favourites - nothing happens. I have switched it off and rebooted twice - still nothing. Help!
iPhone 4S, iOS 8.1.1