04-09-2019 07:59 PM
05-09-2019 09:07 AM
Welcome to the community. 🙂
If you call 222 from your phone, you'll get through to your voicemail. One of the options will be for voicemail settings. You're able to turn on missed call alerts from there.
The WiFi calling feature that @Northerner mentioned might help your signal problems though.