Notification Bell turned back on

[AC Question]

I would like to have my notifications bell turned back on so I know that I have been messaged or Facebook etc. It got turned off on me this afternoon with out full explanation and I want to receive my notifications back with the sound back when I get notified.

 

[B. Diddy]

Welcome to Android Central! Which phone? Are all notification tones turned off, or only for certain apps? Is the phone on Do Not Disturb? Do you see a solid white circle with a horizontal line through it in the status bar?