Ali is still alive. And she probably is A. First,just look at the text! “I’m still here, ******* And I know everything. – A”. Ali knows all of there secrets and all of them think she is dead. Also another text:“Maybe he fools around with students all of the time. A lot of teachers do. Just ask your dad." Ali and Aria saw them kissing right? See what I mean?! If you look at the A spoiler it says Ali wrote in her diary all of her secrets. Here is the text: Courtney read Alison's diary containing all the girls secrets.Then, when you get to season 4, you see Ali saves Emily (or Spencer) but she is gone! Also in a season 1 episode when Hanna gets run over episode, Ali comes back to have a little chat with Hanna on the episode (i don't remember what she said.) and on this site you can see Ally's face in the coat you see her face in the coat if you look carefully here is the site: link
Also Ali name starts with an A and how would a get the phone number. All I have to say is that let the chips fall where they may! Thanks for coming out every one (closes garage door)