Delayed Voicemail Notification Country: USA 
Carrier: AT&amp;T 
iPhone: Xs 
iOS Version: 12.4


I’m wondering if this is more carrier-related than phone-related, but on occasion I won’t have a Voicemail notification show up until hours after I miss a call.  This seems to be random as it doesn’t happen for every missed call and doesn’t seem to be exclusive to calls I send to Voicemail or actually miss. 

Is there a way to “refresh” my available Voicemail list (as the normal pull down to refresh motion doesn’t seem to work) manually?  Has anyone else run into this behavior (and more importantly, fixed it)?
You would want to update to iOS 12.4.1. It is likely the carrier has a "carrier update" that needs to be applied. You can also try Reset Network Settings to completely rule out the device. After trying these, I would say refer to the carrier.