I was able to successfully block a caller after reading how to do it through one of these forums (I'm a Verizon subscriber). My question is this: Does this person know that he/she is blocked in both text messaging and phone calls? Does the text message bounce back as undeliverable to them and if not, how does the sender know that their message was not delivered? Also, how does a caller know that their phone call is not going through versus just thinking you are not answering your phone. Bottom line....I want this caller to know that they have been blocked and can't call me.