I have an iPhone 4S.
Recently, I have stopped receiving a tone or vibration when I receive a text message. Sometimes this also happens when I receive a call. I don't find out until later that I have a voice mail. Also happens when I get an email.
As I said, these symptoms have just started happening the last few days.
I have confirmed the side buttons are a) NOT set to vibrate and b) volume turned up to max.
I have confirmed that Settings > Notifications is turned on and that there is a tone for both the messages and calls.
Any help would be appreciated. Thank you.