Voicemails being "Deposited into text"

Here is what I learned today.  I have iPhone 13

1.  The app and directions mentioned are related to Android users.
2. The voicemail to text is part of my T Mobile plan and is automatically functioning on the I phone once phone or plan is activated.
3. To get the voicemail to text blocked on my I phone I had to contact 611 tech support and get them to block that function.  
4. It is a by phone number that they have to install the block.

Hope this helps.