Apple has released iOS 8.0.2. It’s available now via Settings > General > Update or over Lightning to USB tether to iTunes on your Mac or PC. This comes just one day after the iOS 8.0.1 update left iPhone 6 and iPhone 6 Plus customers unable to use Touch ID or connect to cellular networks. Apple promised a fix within days and delivered it with a day.
Quick response by Apple.
to wait a few days before installing let the others test it