As cell phone is inexpensive and almost all people can afford it,most people tend to depend on cell phones a lot.Whenever you see people around whether they are walking on street or sitting anywhere,you will find that people just stare at their cell phones.This situation has caused public’s attention.Some believe that cell As cell phone is inexpensive and almost all people can afford it, most people tend to depend on cell phones a lot .Whenever you see people around whether they are walking on street or sitting anywhere, you will find that people just stare at their cell phones . This situation has caused public’s attention.Some believe that cell