[LG V30 Themes, Apps, and Mods] JonnyTrulove:
Ok so I'm posting this because we started to get off topic in the other thread, not because I think you will find it useful lol.

Basically the steps I will outline will trigger your Google Dialer to try and activate VVM. If you are on Sprint like me, all it will do is add the voicemail tab. I've seen posts from others that say the app does import all of their current Voicemails but no new ones after that. Maybe that is carrier specific or maybe if you are signed up for VVM through your carrier it works, I don't personally know.

Anyway, here we go.

What you'll need:

1- A rooted device - I'm guessing this will work on all devices not just our V30s but I haven't tested elsewhere. Feel free to provide feedback if you see this and try it on other phones, and then maybe this post can move to general Android instead of V30.

2- Google dialer installed - mine has been converted to a system app, and I'm part of the beta, so I can update through play store. I am also running magisk modules that may be allowing all of this to happen, such as xml pack, Google framework, and some others. Shout out to their respective devs, thank you.

3 - The app Shortcut Master which is available as a paid app on play store.

4 - some patience because this literally only works sometimes for unknown reasons. Maybe we can narrow down the failure rate with some trial and error but for now I can't tell you why it works sometimes and other times nada. The upside is, there seems to be no I'll effects from trying and failing.

Tldr.

You need root, Google dialer (maybe as as a system app) and the app Shortcut Master to get this done.

You should probably Force close the Google dialer app before you start so the settings take hold. Not sure if you have to, but shouldn't hurt to do it.

Step one:

Open shortcut master. Click search and enter the word "voicemail"

Step two:

You'll see lots of results. Ignore them all and scroll down to ones under the Phone App. Find VoicemailSecretCode and click launch. (I guess you could also just search that instead of just Voicemail)

Step 3:

You'll see a white screen with two options.

Sync

VVM config override < click this one.

Step 4:

Press the top option titled "load current"

You'll see it change some of the fields. This is just pulling in the current config and since you don't have much going on, very little should change.

Step5

Click the Override toggle.

Input your phone number (see pics)

Press back once when done.

Step 6

You should back to the white page with the two options again. This time press sync.

That's it. I'm not sure what makes this work since sometimes it doesn't. If you're hasn't updated with the voicemail section, try power cycling and relaunching dialer. If that doesn't work, clear the cache. If it still doesn't work you can try clearing all data, Force closing,and then following the steps again.

Now you should have the voicemails tab. It will try and activate for a while by sending you a provisioning text. It is going to send this text alot at first so be warned as I don't know if it's a free text (do people still have limited texts??)

You will now have a bit more options in your settings menu under Voicemail, however since it never provisions (or at least mine doesn't) the added options are not accessible.

Enjoy your extra tab of nothingness lol.

Feel free to throw around some thanks :)

*edit: The 9 attached screenshots are basically all of the steps in order except for the last two which need to be swapped. If you read them left to right you would follow 1-7, then pic 9, then pic 8 would be the last one.