Why does my Samsung S9 constantly switch from sound mode to vibrate?

[Android Central Question]

I am constantly resetting it by going into settings, then sounds and vibrations, then sound mode. i choose sound and then back out of settings. it automatically reverts to vibrate with no warning and I am constantly missing calls.

 

[mustang7757]

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https://forums.androidcentral.com/showthread.php?t=409154

 

[mustang7757]

You try safe mode ?

 

[pizza_pablo]

What are you volume rocker buttons set to control?
Ringer or media?
Might you be smashing the volume buttons, inadvertently?

 

[casiouser]

This happens to me to. If I leave the messaging app open on the last person who text me, it will never give me an audible notification if they text again.

 

[pizza_pablo]

This happens to me to. If I leave the messaging app open on the last person who text me, it will never give me an audible notification if they text again.

I don't know what would cause that behavior. I'm in that, exact situation, daily and notifications continue with successive texts from the same person, with their thread open.

 

[Laura Knotek]

Which exact version of the S9 do you have?

What happens when you try Safe Mode?