You might not have ever noticed, but your smartphone's keypad for phone numbers has a few mysterious buttons. They'll appear in your phone and contacts app whether you have an iPhone or Android phone, but most of these puzzling keys aren't explained by Apple, Google, Samsung, and other device brands. If you were to ask your wireless carrier what some of the strange keys on the number keypad are, you might not get a solid answer for most of them. But we've done the research and uncovered the story behind each unique character that appears on the number pad when entering phone numbers to call... more
