How to answer whatsapp or viber call (not regular phone call ) with voice command or gesture on s5 ?

I know how to use voice command and hand gestures to answer a regular phone call on my samsung galaxy s5, but when i try using the same commands and gestures to answer internet calls on my phone through whatsapp and viber, i am unable to answer the call. Can someone suggest me a solution for this.

Show Accepted Answer

Guest Quick Reply (No URL, BBcode or HTML)

Last post by haylee.hand
1 hour ago
Last post by greenfelder.cielo
48 minutes ago
Last post by anissa.rau
3 hours ago
Last post by bernier.laney
1 hour ago
Last post by mbalistreri
3 hours ago
Last post by fay.clair
3 hours ago
Last post by hartmann.edd
1 hour ago
Last post by nia42
4 hours ago
Last post by oschmitt
2 hours ago
Last post by plang
3 hours ago