If you are old enough, you can remember the days before mobile phones. If you wanted to call someone, you had to find a telephone someplace, be it in a home or other building or a phone booth. The importance of the invention was underlined by the fact that two companies—Motorola and Bell Labs–were racing to be first. The first call was by the winner Motorola’s Martin Cooper to Bell Labs’ Joel Engel. Today no one would leave home without his/her mobile phone. Unfortunately, people pay more attention to their phones than to the people around them.