Smartphone Are smartphones necessary in life? I think it is useful but sometimes harmful. We are addicted to using it and don't focus on work. Children play mobile games too much. They always carry it even when they go to the bathroom. My nephew irritates when his parents stop using his smartphone. In my case, I don't play mobile games at all. I used to check my Facebook all the time but I reduced my time to use SNS. I also used to bring my smartphone when I go to the bathroom, but these days I bring a book instead of it. How often do you use your smartphone?