I got a mobile phone since 3 years ago. I got it as a Chrismas gift. I think the prize of a smartphone depends on the brand and how old it is. According to this, a mobile phone can be very cheap or very expensive. My mobile phone is big, black and a bit heavy. I don't spend many hours with it because I prefer to do other activities like reading books or painting pictures. I use my smatphone to search information and play games. I think it's useful to search and to comunicate with other people.
