I am really not loving this Samsung support model, which appears to be "let's start a community and let users solve each other's problems and we won't have to do anything at all" and maybe you can hope that Samsung support will see your post and weigh in.
Samsung must develop a way to dismiss persistent notifications. I don't need a constant notification on my watch of a voicemail that does not exist. It wastes battery power and annoys the user. THERE IS NO VOICEMAIL. At the very, very least, the notification should disappear when the voice mailbox is accessed (message or not). There also is absolutely no reason for a notification to be ongoing. If a user saw a notification and chose to ignore it, there is no reason to keep reminding them of it. ONGOING NOTIFICATIONS SHOULD NOT EXIST.
I noticed that even when there is a legitimate voicemail notification, I cannot dismiss it until I access the voicemail. This is wrong. At the very least there should be a setting whereby you can a) select if you want notifications to be ongoing and b) select how many times and at what intervals you want to be reminded, or c) not have an ongoing notification at all.
I understand this particular issue seems to be with the Galaxy Watch 4 and T-Mobile, and T-Mobile says their Samsung tech liaison team is working with Samsung, and Samsung will, supposedly, eventually come up with a fix for it. But it would not be happening in the first place if any of the suggestions above were utilized. I also understand that some people have had success with resolving this issue by factory resetting their watch. I refuse factory reset my watch for a minor issue, especially when the backup data may contain whatever error is causing this, and I don't want to have to go through all my settings again after a reset, just to get my watch to function properly.
Thank you for reaching out. I can certainly understand your frustration with repeated voicemail notifications. I noticed you said that you had a voicemail notification even if you didn't have a voicemail on your phone. Are you by any chance using the Digits program through T-Mobile where your watch pairs with the same number as your phone?
So, today's update appeared to solve the problem of persistent notification, but that was only while it was in proximity to my phone. I noticed that at some point during the day the notification was absent from the notification drawer and I was very happy. However, as soon as I moved out of Bluetooth range, the (phantom) voicemail notification returned on the watch. Previously, the notification stayed, even if it wasn't actually buzzing me, but now it only stays if I am out of range of my phone. Once I acknowledge it, it leaves me alone, but still hangs around, unable to be dismissed. Once connected back to the phone, it disappears. So thanks, Samsung, for finding a half fix to the problem. Now, if you can just address the real problem that ALL notifications should be able to be dismissed and never heard from again...
Question: what if we are using T-Mobile's "Digits" program (like you mention above)?
Do you have any info for us about this that you can share, or know of a fix for the annoying voicemail notification?
Thank you for reaching out. @Mishiel. I see T-Mobile currently has a thread in their community regarding the symptoms you are experiencing. Give this link a try for the solution other members have found on their watches: https://community.t-mobile.com/android-9/constant-voicemail-received-on-watch-12269
I had this same issue when I got my Watch4 (TMO LTE - DIGITs line). This was about Dec 2021 timeframe.
Many times throughout each day, I get notifications of a non-existent voice mail messages.
TMO support was clueless about this issue. Then, I had Samsung support and I was lucky to have gotten a support rep that previously to worked in TMO's network support area. He knew of the issue and said that he would solve the issue now. He made me factory reset my Watch4 AND reset the phone plan. When you a reset your watch, you have to also select the option to reset the phone plan. Ever since then, I never had a persistent voice mail message again. Worked perfectly. The only problem that this had created was that after the phone reset, i had to setup the phone plan again which was the easy part. Unknowingly, this created a new DIGITs line (which is OK), but the first line was still on my account. I was getting charged for two lines. I had to contact TMO support to delete that first line, but it took a lot of explanation. All has been good since.