Samsung Voicemail app notification failures

I've already posted my problem with my Xfinity-provided Samsung A54 phone on Samsung's site, so rather than reproduce all that here, I'll provide a link to my Samsung post: "Voicemail app provided no notifications of pending voicemails for six weeks". Because Samsung has taken down some of my threads before and may do so with this one, I'll provide my latest item from that thread here. This is a summary of my problems so far:

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I thought I'd provide an update on my Voicemail app experience. I have a Samsung A54 with the preinstalled Voicemail app, version #18.1.00.23. I've had the phone since October 16, 2023. In the Settings for this app, absolutely everything relating to notifications and the permissions that the app requires is enabled. Additionally, the "Battery" setting is "Unrestricted" (in other complaints, some have claimed that this setting value is required for proper notifications to occur).

At this point I have experienced the following notification problems:

1) The Voicemail app failed to produce notifications that had been waiting on Xfinity's voicemail server for weeks. I was alerted to these only after some subsequent voicemail finally produced a notification.

2) Upon properly producing a notification for a call, the Voicemail app contained list entries for previous voicemails that I had deleted days or weeks ago.

3) Again recently, I opened my Voicemail app and saw a single list entry for a voicemail for which no notification had ever been produced.

During the times when I experienced #1 and #2 above, I had been in the habit of turning my phone off overnight. Because my increasing problems with my phone disconnecting from the mobile network after restarts (see my complaint described in thise two posts):

• Samsung “One UI” updates disconnect phones from WiFi and mobile networks (Samsung)
  
  
• Samsung “One UI” updates disconnect phones from WiFi and mobile networks (Xfinity)
  
  

by the time I experienced #3 I had given up on turning my phone off at night, so now my phone is on all the time. So if the behaviors in #1 and #2 could have been attributed to voicemails having appeared while on the server while my phone was off, that is no longer the case, and in any event I would not expect to be required to have my phone on during the appearance of a voicemail in order for me to receive a notification that a new voicemail is present.

Samsung and Xfinity definitely have serious problems with the interactions of the Samsung A54 and the Xfinity network. My phone should not disconnect from the mobile network (and require a network reset) just because I restarted it or because a Samsung "OneUI" update forced it to restart. My Voicemail app should always show a notification when it contains a voice mail item that I haven't seen yet. My Voicemail app should not show list items for voice mails that I deleted days or weeks ago.

It is distrubing seeing ads for fancy features like "AI" in new Samsung phones, when Samsung and my service provider (Xfinity) cannot even seem to manage their most basic functions properly. I have spent an enormous number of hours working on problems I've had with Samsung apps and failed Samsung/Xfinity interactions. It astounds me that two market leaders in the mobile phone marketplace can have so many problems that seem to remain perpetually unaddressed. Spare me your new features; basic network stability and correct notification behaviors are far mor important to me.