One who spends an inordinate amount of time using, and therefore is especially adept at using, a smartphone to lookup information on an instant's notice. Often knows more about how to use someone's phone than the owner himself.
A phone is someone that’s always on the phone rather than having human interactions. They will sit in a group and text each other instead of just talking. They’ll raise there head and look at someone right after they received a text and laugh then start texting back.
Basically a person that you see walking down the street that feels the need carry on a fake conversation on their cell phone due to the fact that they are by themselves and want people to think that they are on some important mission or need to be somewhere.
Me and Rebecca were heading to the bar last week and saw Jessica walkingdown the street by herself, talking on her cell phone. What a cell-phonie she is.