distorted sound iphone Xs
iPhone Xs. Distorted sound (fuzzy) in earpiece on calls and FaceTime audio. Switching to speaker - not distorted. Switch back to earpiece, distorted. With Bose wireless bluetooth headphone attached - no distortion. Latest iOS installed. Phone restart has been done more than once. If turn Bluetooth off in settings - still distorted.
Help appreciated.
iPhone XS, iOS 13