Just5 offers mobile phones that are designed for Kids and Seniors that require five basic featureshttp://www.just5.com Just5 offers mobile phones that are designed for audiences that require five basic features: ease of operation, big buttons, amplified sound, a long-lasting battery for reliability, and an emergency SOS button. Primary target audiences include seniors, people with poor eyesight or hearing problems, people with medical conditions that require constant care, and kids who need a âÂÂstarter phoneâ with basic functionality.