Watch can’t hear phone calls
I bought the apple watch series 4, four months ago and all of a sudden when I make phone calls or answer phone I can’t hear the caller and then can’t hear me
Apple Watch Series 4, watchOS 5
I would suggest you reset your watch. Press the crown and side button in untill the Apple logo appears. Also Check your Watch is updated to 5.2 and your iphone is running ios 12.2. Finally if still not resolved Unpair your Watch and repair it.