sound issue
On my iPhone 6 (iOS 10.3.1) when I receive a message, there is no sound. This is also the case from time to time (not always ...) when I receive a phone call.
The 'Do Not Disturb' setting is not activated, but in the 'SILENCE' section, the 'Only while iPhone is locked' is ticked.
Any solution?
Thanks
iMac, macOS Sierra (10.12.4), 3,5 GHz Intel Core i7