How to turn off WhatsApp incoming message sound in Redmi Prime 2 / MIUI 7.1? I've turned it off in 


Setting > Notifications > App Notifications > Whatsapp > Sound &amp; vibration
Whatsapp > Settings > Notifications > Conversation Tones


And it still sounds. At one point I even tried to turn off all WhatsApp notif, but it STILL sounds even when no notification shown.

I just recently noticed this because usually I put my phone in Silent Mode. But now I'm waiting for a phone call, I can't do that, and suddenly noted how annoying this thing is.
One of the sound to play in the whatsapp settings is Silent. That should work and leave notifications still appearing. 
Indeed extremely quitr confusing.