first of all, using smartphones is expensive. the expense includes the price of smartphones as well as the fee for multi - applications. high technology and brand name also add a lot more payment. For example, iPhone 5 is more expensive than iPhone 4s, iPhone 4, or previous generations of the handset.
secondary,excessive use of smartphones can affect users physical health. for
lastly, using smartphones can be time consuming. people who are addicted to smartphones may spend too much time chatting and sharing information with friends or enjoy multiple functions for entertaining themselves
more than 1.1 billion active Facebook users upload photos and chat daily.whether, exploring social networks or checking personal email.