What are the things you like doing with your smartphones? Making phone calls? Playing games? Taking photos? Today we will not discuss what we should do with our smartphones, instead we will summarize 10 stupid things smartphone users usually do.1. Taking photos of food and share themPlease. The only time people want to stare at food is when we see the menu before ordering.2. Sending SMS to solve disputeYou will miss the two key components in communication : content and tone.3. Holding mobile phone high at a concertUsually holding mobile phone high at a concert is like holding a lightstick or l...