SO,
Phone guy in fnaf one dies on night 4 and he is all of a sudden alive in fnaf two.
He says foxy is my favorite.(he says: "Did, uh, did Foxy ever appear in the hallway? Probably not, I was just curious. Like I said, he was always my favorite."), We all know that the older brother is Micheal Afton and The older brother wears a Foxy mask. So Michael is probably phone guy on fnaf two. but it's just a theory! (SOMEBODY PLEASE DON'T SAY A GAME THEORY)