Data & Messaging Features, Internet Tethering

On my armor deal I've had 2 notices about my number was somehow captured from att and is on the dark web, the other was my email was grabbed in something else , according to active armor it happened April 18th, I'm curious as to why they haven't notified the people involved themselves you know they

This problem just recently began approximately three weeks ago. Both android and iOS are not receiving verification codes via text. When a call is an option, the code comes in voice call. Not every site has that option. The problem is on all sites. Checked all settings and turned off Wi-Fi calling.

Visual voicemail is not working on my Samsung S20 FE. If I try to use it, it does not work and then forces me to reset my vpicemail to get messages with regular voicemail. It has become a pain and I would like to remove it. How can I do it on our phones.

I am trying to provide alerts for my users via E-mail to SMS. AT&T numbers are having issues receiving these messages. Is there someone I need to talk to, to remove some sort of block or get whitelisted? We are sending business alerts to our own users who have opted in. No spam or marketing mess