1) Teenagers nowadays every step of the use of technology. Communicate with friends from all over the world for free. Include new knowledge through the Internet. Also use the technology to have fun but also to learn. They play with playing games and learning using the Internet.
2)Communication without telephones would be very difficult. Today, almost all use their phones if we remain missing only a computer and the form of a letter. People probably would benefit most from Skaype or social networking sites but it would not be as mobile as the use of the phone.