A
No sound notifications when receive text message on my galaxie s9
I had this same problem...
Go to your message app
Click on three dots in top rt corner
Settings
Notifications
New messages
Importance
Choose either "high" or "urgent"
I just had the same problem U guys. It was driving me crazy too and i had a similar problem years ago with pop ups that kept coming out of nowhere every time i used my phone so it lead me to this. It is a app thats not allowing u to hear sounds or receive notifications at the top. I have the S9 plus and just started having this problem today. I uninstalled the app called security masters and bingo! I got notification sounds n pop up notifications back. I guess the security app had a setting where it controlled my notifications. I couldve went thru it and found the settings but i was so frustrated i just Uninstalled it n because tmobile offers there on security app. Good luck u guys in finding the app