Cell phone has altered human relations. There is usually a note on the door of conference room, which reads "close your handset." However, the rings are still resounding in the room. We are all common people and has few urgencies to do. Still, we are reluctant to turn off the phone. Cell phone symbolizes our connection with the world and reflects our "thirst for socialization." We are familiar with the scene when a person stops his steps to edit short messages with eyes glued at his phone, disregard of his location, whether in road center or beside restroom.