iPhone 6 Can't hear caller very well (ear speaker low volume) fix

How to fix can't hear phone calls iPhone can't hear the caller fix iPhone 6 can't hear the caller fix iPhone 6 Ear speaker low volume fix iPhone 6 Call volume too low fix iPhone 6 No sound incoming calls fix iPhone 6 No sound when calling fix iPhone 6 Ear speaker not working fix iPhone 6 Can’t hear caller Issue fix iPhone caller can't hear fix iphone cant hear caller how to increase hearing volume in iphone 6 the ear speaker in iphone 6 is low iPhone low volume on calls iPhone ear