It’s unclear what ultimately became of Phone Guy after his death in FNAF 1, but some fans have speculated that he was stuffed into one of the animatronic suits in the back. Not only is Phone Guy the one who tells us that the animatronics are in the habit of stuffing security guards into suits in the first place, but he also directly asks the player to check the suits in the back just before his death in Night 4’s call. Since we’re unable to leave the office and check in the back room ourselves, we can’t confirm exactly what became of Phone Guy. Still, I’d be surprised to find out that he suffered any other fate.