Samsung Galaxy Buds FE SM-R400 mute microphone during call

[DGal_SamsugC]

Is there any way to mute microphone during call on Samsung Galaxy Buds FE SM-R400  ?
If not , Samsung please support this !

[Samsung_Moderator]

Thank you for reaching out. I can certainly understand the importance of being able to mute our microphone will on calls. In order to mute the mic on your Galaxy Buds FE give this a try: To turn off the microphone, touch and hold the touchpad during a call, so the other party cannot hear you. This will mute the call, and nothing will be displayed on the phone.

[DGal_SamsugC]

Thanks for the answer.

Unfortunately that didn't work.

The touch control in Wear app,  "touch and hold" is the only configurable touch, you can use it for volume up (on R) and volume down (on L) and for Spotify and more, but it does not relate to mute in call : 

Touch and hold can also "decline all" during ring..
Supporint mute coudl be so easy for Samsung to offer..  
Do you have any other idea?