recursor, Feb 3, 2019 : My OnePlus 6T (international version, not the TMobile version) does not display any icons in the notification bar for missed calls or unreviewed voicemails. The Phone app icon doesn't display a badge indicating either of those. In short: there is no way to see I've missed a call that hasn't left a voicemail or to see I've missed a call that hasn't been answered and hasn't left a voicemail. The only way to see I've missed a call is to look at the recents tab in the Phone app and the only way to see that I have new messages is to look at the voicemail tab in the Phone app. Needless to say, this is not ideal. Is this how it works on everyone else's 6T?