Sample answer:
Since the first mobile phone was invented, this technology has already changed our lives. However, while it gains its popularity, a lot of criticism also follow. Personally, I believe that it should not be banned.
We cannot avoid the fact that the mobile phone brings much convenience to our lives. In the old times, if we want to contact with a friend in a distant place, we may write a letter, which will take more than half a month before he gets the letter. But with the help of the mobile phone, we can get the connection with our friends in less than 10 seconds. In addition, the mobile phone is able to achieve many features, such as shopping online, GPS, buying tickets and so on, which not only saves our time and spending, but also brings much more entertainment.
At the same time, mobile phone industry creates great quantity of business opportunities. In the past one decade, mobile phones are sold by hundreds, bu thousand, by million and provides unaccountable jobs in the modern world as well. For example, according to a survey, Samsung has made great contribution to Korean’s GDP. However, the mobile phone also has an effect on our physical and mental health. As we all know, if we insist to play digital games on our phones, we may suffer some eye diseases unless we realise its harmfulness. To make thins worse, nowadays many people would prefer to spend their time with some virtual friends rather than keep their families accompanied in reality.
In conclusion, I consider it has more benefits than drawbacks. If the mobile phone is used at a right place and right time, it still can be put into excellent usefulness.(287 words)