“###-###-### has deposited a new message” in your text messages
This is to fix the problem of voicemails being transcribed (very badly transcribed) into your text messages instead of in the voicemail tab in the phone app.
this apparently is a issue with t-mobile and Verizon customers.
open your T-Mobile app and login.
then follow this path to turn off that feature.
In the T-Mobile app:
click “Account” tab
Click “Profile settings” link
click “Block calls and messages”
click “Block Other” on the phone line you wish to update
Turn on “T-Mobile Voicemail to Text Block”
i guess it’s default voice mail to text automatically active.
So you need to activate the block. feature
iPhone 12 Pro, iOS 17