You probably put your phone on silent when you're with a client, but you might leave it on vibrate mode. (realtormag.realtor.org)
If you don't want to totally disable vibrate mode on your Samsung Galaxy S9 or S9 Plus, you can customize both vibration intensity and the notifications that use tactile alerts. (digitaltrends.com)
But I wish it was a bit more customizable — I'd like to option to invert the slider order, for example — and I don't like that OnePlus recently removed the ability to switch the OnePlus 5T to Vibrate mode by repeatedly pressing the «down» key on the volume rocker. (xda-developers.com)