At 8.1.2 videos won't stream smoothly - they go backwards every few seconds. I need to either fix that in 8.1.2, or revert back to my previous operating system. Help!
In this case I would suggest resetting your Network settings under General>Reset. I had a weird issue with FaceTime not showing as an option for my contact info with my Brother after he got a new iPhone 6 Plus (came over from Android on Straight Talk) and this fixed it. So, I think this may solve your issue. If not, try the Reset All Settings option. You won't lose any media, content, etc - but both options are just a minor inconvenience of just having to go back in your settings and put the options back to how you like them.