Visual Voicemail using Default Android 10 App (NOT T-Mobile App)?

I was going to add this to another thread, but it was locked. I discovered a work around. (persistence was key here). Note that I am not an expert, and your mileage may vary.

1. If the T-Mobile account is older than a couple years, the voicemail box (on T-Mobile's end) needs an update. In order to do this, the user needs to request that a T-Mobile rep reset their voicemail account. (completely reset back to new)
2. The voicemail box then needs to be authorized for visual voicemail, which is done through the T-Mobile Visual Voicemail app. The user should not accept any of the extra services, as this will designate the Visual Voicemail app as the only usable external app for the T-Mobile voicemail service.
3. Then the user must delete the T-Mobile visual voicemail app from their phone. This app blocks the voicemail user settings on android devices and cannot remain installed if the user wants to use stock or built-in voicemail services.
4. The user can then restart their device and activate visual voicemail in the stock Google phone app.

I have tested this on a few different android devices, including a Oneplus 9, Oneplus 6t, and a Samsung Galaxy A50. So far, it works 100% of the time. This tells me that it is likely a T-Mobile software issue, but I'm mostly just glad that there seems to be a common solution.

Please like my reply if this solution worked for you. If you are not willing to do all these steps.. then unless you have a Nexus device or an IPhone, get comfy with the T-Mobile visual voicemail app. A lot of people have spent a lot of time looking for a solution.