Vermont’s namesake iOS software version was released shortly after 8.0.1 (which was only available for a matter of hours) was released. 8.0.1 was an update to iOS 8 intended to resolve some third-party keyboard issues, Family Sharing problems, and other small glitches.
Immediately after Apple introduced 8.0.1 for user devices, it was found that the update caused loss of cellular network connectivity and Touch ID on Apple’s newest devices: the iPhone 6 and iPhone 6 Plus. No iPhone 4s/5/5s was affected in this manner. Apple stated approximately 40,000 users were affected.
The only resolution for these iPhones was to reinstall iOS 8.0.0 from scratch and then restore from a backup of the device (hopefully they had one).
iOS 8.0.2, the current operating system, is for the most part stable with many problems having been resolved, including the 8.0.1 issues if users happened to still be on that operating system.
As always, have a backup of your phone! I recently signed myself up for the $12/year iCloud Drive 20GB plan to make sure there was always enough room for my iPhone to have an automatic backup. A backup of my phone is one thing I’ll never have to worry about now. Alternatively, one can backup their iOS device by using iTunes and connecting the device directly to the user’s computer.
For more help on choosing a backup method for your iPhone, iPad, or iPod, and instructions on setup, visit http://support.apple.com/kb/HT5262
A full list of the iOS 8.0.2 and a list of new iOS 8 features are available at http://support.apple.com/kb/DL1758