Mine wasn’t working either even after trying the other ideas but after a play around I discovered this.....
press your volume button to show the ringtone volume
press the down arrow on the top right hand corner
the volume for calls and notifications is there. Mine had been muted for some reason.....
I'm sorry but I dont understand your fix. Ever since this new update to 184.108.40.206 on the s7, I cant even sample the notification sounds from the list of choices. I dont get any sounds except the ringtone choices and everything is turned on in every rabbit hole I go down on this thing. I dont know what application manager refers to in Droid Guy fix and need everything spelled out for me step by step. I dont know where to clear cache for messaging??? Need help before I lose my mind with this phone.
On my calendar notifications I was getting sound I had downloaded from Zedge. All of the sudden it changed to tone "On Time" and no matter what I select it defaults to that.
This fixed my friends issue as well but mine is not blocked unfortunately so still not working. Going to try AT&Ts fix now. They suggest one of those tricky 500 step stand on your head while walking backward fixes lol