Advantages and disadvantages of mobile, the Internet and social networks

 Mobiles, the Internet and social networks have advantages and disadvantages.
 Mobile phones have advantages like calling everyone if you have a problem, an accident, etc. or to use the alarm clock, for example. Mobile phones have disadvantages too, you can lose a lot of money sending messages and calling everyone and you lose a lot of time if you don't organised yourself.
 The Internet has a lot of advantages like searching information for doing the homework or for curiosity. But it has a lot of disadvantages too, people talk with friends in social network and if they are teenagers, they don't do their homework because they prefer to talk with friends.
 Mobile phones, the Internet and social networks can be very good, if we know how to use them.