Phone does not make any notification sounds

[iisai]

In the last 24 hours, my phone (Galaxy S21 5G) has stopped making notification sounds.  I get the notifications, and it vibrates briefly, but there are no sounds with the notification.  I've checked all the obvious things including: 

• Verified the phone is not on mute or vibrate, and the volume is up to max on Ringtone, Media, Notifications, and System
• Checked that there are no App settings that mute or lower the volume
• Do Not Disturb is not on
• Separate app sound is off
• I'm updated to the latest Android version (Software version = G991U1UES8EWG3)
• I've restarted the phone
• I've reset all the Settings to default
• I've cleared the cache and data for the app I need most (Opsgenie)
• The speakers on the phone work (media sounds play)

Another odd thing is that when I go to Settings > Sounds and vibration > Notifications where you can select the sound, nothing plays when I select different sounds. It does work on Settings > Sounds and Vibrations > Ringtone.  I've restarted the phone in Safe Mode, and this behavior is unchanged.

When I go to Volume settings, and adjust the volume on the different types of sound, Ringtone and Media always play when the volume slider is adjusted.  Notifications will play once, if I change it's volume after Ringtone or Media, but then stop for all future adjustments until I adjust Ringtone or Media again.  System never makes any sound.

I'm specifically concerned about the app Opsgenie, since I need to hear on-call alerts for work, but none of the app notifications are making any sounds.

[Jontero12]

I Had same issue, but found solution in my case. i Have samsung watch and there is setting in wear app settings -> notification -> disable phone notification. That was enable, i disable that and now my message sounds work.

[Members_uuNVeTz]

Worked for me.

[DarrenGraham]

My S21 has started the same issue recently. Very frustrating. Hoping there's a fix.

[userJzohFgkILc]

Not sure if anyone is still having this issue, but it started for me after the last update. I tried going into the Notifications setting and changed the Notification sound and still had the issue. Just fixed it though in case this helps anyone else.

Go to Notifications>App Notifications>Messages. For some reason the Alerts was set to Silent so no matter how much I adjusted the other settings it overrode it. I changed to Allow sound and Vibration ad it instantly started working.

[iisai]

Mine is still happening sporadically. None of the proposed remedies ha e fixed it permanently. I do think there's some process that is silently crashing somewhere, so even if whatever it is gets reset and occasionally allows notification noises, it's not reliable.

[Cincinnasti]

I've been having this exact same issue for months... Even the guy at the phone repair store couldn't figure it out and thought it was probably a software issue that would be fixed in a coming update. 2 updates later and I still can't hear any notifications. Someone please help 😭

[Shiloh615]

Any other fixes yet? My BT is off and still no notification sounds after trying all other options. Ring sounds work ironically. This is VERY frustrating.

[bill-e]

Just checking.  Do you have a Samsung Smart Watch and is Wear->Watch Settings->Notifications->Show Phone Notifications on Watch->Show alerts even when phone is in use?