This morning at 12:28 AM. Someone signed in to my Verizon Messages account with an "unknown" device at an IP address (which I have). Then, the perpetrator attempted to obtain my text messages so they could get "access codes" to one of my other accounts. They attempted to gain access to another account for approximately 2 minutes.
I notice that the "unknown" device is no longer registered when I look at "registered devices". Is there a way to limit who can register a device and receive text messages, or to opt out of this service?. It appears with more and more credit card companies moving to text messages for authentication purposes that this service may be used for nefarious purposes.
I am sorry to hear about this!
The first thing to do is re-set your web account password to a stronger password. Not having the password will limit others from registering devices on the web account.
In the WEB app Main Menu -You can set 'NO' to 'Stay Signed In'. This will require a password for every web session. Now, every time you (or someone else) signs into your account you WILL receive a text notification alerting you to this.
Let me know please if you have any more questions.