Chosen Solution
No current voicemails on my phone and icon/notification for new voicemail is stuck on my phone. LG Aristo has no phone app to clear data??
This normally can be cleared by actually leaving yourself with another voicemail. Then delete it, and the icon should go away. Alternatively, see on the appstore and see if your provider made a “visual voicemail” app. I find vv way better than the old fashioned one.