Essays / How to start - How has the introduction of mobile phones made communication easy? [4]

Please the lecturer said the introduction on ''how the invention of mobile phones has made communication easy'' should be more than a page,so can you stress more on the introduction for me,since is a 11 to 13 paper can you give me points so i may have something to write on the body? i have about 4 points on which to base my essay on but since it is a 12 page paper and i do not think it will be up to that 12 page,please can you help me by giving me more points?