Chosen Solution

My iPhone Bluetooth connection keeps dropping. Lasts for seconds, on multiple devices, then starts working again! Really frustrating on a run. WiFi not affected, range for Bluetooth still fine… problems started with iOS 11 and continued into iOS 12 public beta. Any ideas??

I would start by doing a “Settings/General/Reset/Reset Network Settings” to see if that helps. IF the phone has been worked on or opened in the recent past, it is possible that one of the antennas or interconnects was partially dislodged.