Before I get flamed, it’s a second-hand iphone 4, but I don’t want to have to replace it…
To the best of my knowledge, I haven’t done anything to it – it hasn’t been dropped, it lives in an Otterbox so hasn’t got wet – but it has stopped ringing/beeping/vibrating except when I go to change the ringtone in Settings. It’s as if I’ve flicked the Silent switch on the side, but I’ve checked that.
I can use it to make calls, and if I see that it’s ringing, I can pick up the call and hear/be heard OK, but I just can’t get the ring/vibrate settings to work. Any suggestions?