Why does my phone say "Welcome to Twitter"?

And more important, how do I get rid of it?

I don’t have a Twitter account (that I know of) and don’t ever want one.

I don’t have a smartphone, just a “basic” Verizon LG-something phone.

As far as I know, I haven’t done or said anything to make Twitter think I’m interested.

I haven’t ever input my phone number on Twitter. I don’t even give it when I place online orders; I fill in the phone number space with zeroes. If I have no choice, I use my landline, not my cell, which I keep for family use.

The text message appears to come from “404–04” and has the name filled in, as if it were in my contacts list, but it isn’t. The message invites me to sign in or up with a reply to the message. I can ignore and delete the message, sure, but how did Twitter get my phone number and how do I keep Twitter away?

This kind of thing creeps me out. It feels like more than an unwanted intrusion—it’s an invasion.

How can I make it go away?

Tags as I wrote them: Twitter, cellphone, phone number, text message, invasion, privacy.