iphone 7 no dial tone, cant be heard or hear anything on calls
I have an iPhone 7, recently I cant here people on calls, they cant hear me. I get no dial tone. the phone rings, I get keyboard clicks, alarm and can play music.
If I send a text to another iPhone they get the notification, but the message doesn't display.
I have cleaned my sim card, reset all settings and restarted the phone, but its still the same.
Any ideas?
iPhone 7, iOS 12