It seems like there is another issue with iOS 8 since its release recently. This time the issue is with the Bluetooth connection. It affecting users who just upgraded their iPhone to iOS 8 and users who just purchased the new iPhone 6 or 6 Plus. There are apparently several different issues altogether, including refusing to pair entirely, neglecting to play audio over the speakers or disconnecting when there is a phone call.
The Bluetooth connectivity issues with devices running iOS8 and iOS 8.0.2 not only affected the automobiles but any devices that can use Bluetooth to do pairing with iPhone running on iOS 8 or iOS 8.0.2 is also affected. These devices are known to have this issue such as headphones, speakers, headsets and many more while the automobiles are known to have this issue such as Hyundai, BMW, Mercedes, Lexus, Toyota, Ford and many more. The Apple Support is aware of the compatibility issue between the iOS 8 and any devices that can support pairing with Bluetooth and Apple is currently working on fixing the issue.
There is another workaround to solve this issue temporarily but it is needed to be done with caution since it can wipe out all the data that is present in the iCloud Drive after the process. This workaround is to log out from iCloud, and forget the Bluetooth devices by using “Reset All Settings” or “Reset Network Settings” option on the iPhone and restart it. Then the user will need to re-pair the devices using Bluetooth and logging in back to iCloud.