One of the most annoying things about WhatsApp is how it latches on to the ringer sound for notifications and not the actual sound for notifications. The result is that you cannot silence or reduce the sound of WhatsApp notifications with just volume buttons alone - you have to adjust the ringer volume to adjust the notification volume. In essence WhatsApp assumes that their notifications are necessary as phone and forces you to make a choice to silence both phone ringer and WhatsApp if you just want WhatsApp notifications at a lower volume. Just shitty design this by Facebook, but then what to expect. In an ideal world WhatsApp notifications can and should be controlled via sound volume not ringer volume but here we are.