I'm on Marshmallow v6.0 on a Huawei Honor 5x. I would like to assign different notification sounds for things like voicemail, Facebook, Calendar, ringtone, Instagram, Words with Friends, etc. I'm especially needing a unique notification sound for voicemail since T-Mobile is working on upgrading the cell towers near my apartment and the only way I know I've missed a call is by voicemail (it sucks); it'll be a month before their done working on it. In the meantime, when my elderly neighbor needs assistance and calls, half the time I don't get the call, no missed call notification, and if I don't look at my phone, I don't notice that a voicemail has arrived. All notifications sound the same. So, is there an operating system level way to control notification sounds per app? Also, I don't have a voicemail app, so do I just have to change every other apps' notification in order to make voicemail unique?