On your iPhone, go to Settings and locate Bluetooth.
Turn Bluetooth Off and On via the Settings App: Wait a few seconds and tap the Bluetooth icon to turn it back on.The icon will be black inside of a gray circle. Tap on the Bluetooth icon to turn it off.Open the Control Center by swiping up from the bottom of your iPhone’s screen.Here’s how to do it: Turn Bluetooth Off and On in Control Center: So before you explore more technical and sophisticated solutions to the problem, start by turning your iPhone Bluetooth off and back on again. Same is true if Bluetooth is not working on your iPhone. Most problems have the simplest solution at times. Fix iPhone Bluetooth Not Working without Data Loss Turn Off Pairing Mode on Bluetooth Device
