It will turn your new iPhone into a lump of plastic and metal. The update to iOS 8.01 simply made it impossible to make a call!
The touch ID login does not work either.
That is rather bad for a phone - especially a smart one...
The fix is to downgrade the update to iOS 8 via iTunes. If you have avoided this upgrade then do not upgrade to iOS 8.01
Apple is sorry for the inconvenience:
We apologise for the great inconvenience experienced by users, and are working around the clock to prepare iOS 8.0.2 with a fix for the issue, and will release it as soon as it is ready in the next few days
Maybe the time has come to take Co-Founder Steve Wozniak's advice?