Smart phone is addicting and can cause kids to use it constantly and can ruin their life, with being able to play games, watch videos, and go to facebook, all from a phone. A recent study compared kids in high school who had smart phones with kids who didn't. The phone kids' grades were a lot worse. This example clearly shows bad result of using smart phone, so parents should promote of education to their kids more than give smart phone to them. Kids should not have smartphones