Unable to mute calls while I am calling out

[YoungChris]

Samsung update your phone app why is the mute button grey out for i want to mute while I'm calling someone not when they answer 

[gabe80million]

It's only greyed out until after they answer. Send a screenshot of it during a phone call, not while you're dialing someone.

[Dougstev]

The button is grey out once the other person answers.

[YoungChris]

Which weird because my moto g play could mute it's never grey out

[bill-e · Accepted solution]

The button is grayed out because the mic is inactive/disabled.  Once the call is connected the mic is enabled and you can mute it.