What happens when you block a number on an iphone?

I had a number blocked online on my Verizon account. My dad said that it says on the website all calls and texts are blocked. So what happens when this person I blocked trys to text or call me? What does it say for an iphone?

They hear a message that says this subscriber has something like preferences set up and the call doesn't route. The next message may come back to your phone as undelivered. You can still call them with *67 in front of the phone number. And if they iMessage your phone number, you will still get it. Verizon cannot block iMessages sent from other apple iOS devices.ie another iPhone