So, two issues - or maybe just one issue causing both things?
1- I get no notifications of new voicemails.
2- I get “Connection problem or invalid MMI code” when I attempt to dial into the voicemail mailbox. So, no way to access any messages that might be there.
I’ve tried resetting my phone, running in safemode, resetting all network settings, reseating the SIM card, and removing any apps that I’ve installed within the last month - none of these have helped.
Hoping that the community might have some helpful advice! Thanks in advance to anyone that might have a clue what to try next :)