Mrs H was moaning that her iPhone had never actually played a ringtone since she got it, it only vibrated. I asked if she’d checked the settings – she had. I suggested turning it on and off again (maybe an ex-Microsoft engineer made that particular one). That didn’t work.
I said I’d take a look and sure enough the settings looked OK. So I checked the mute switch, and asked her if it had been on since she got it.
“What mute switch?”