From the information given in the above column chart, we can see a striking contrast in mobile-phone subscriptions between developing and developed countries from 2000 to 2008. During this period, there has been a dramatic increase from 0.4 to 4 billion mobile phone subscriptions in developing countries, while that of developed countries remained steady under 1 billion during the decade.

　　    At least two fundamental factors could contribute to this phenomenon. On the one hand, with the rapid increase in economy happening in the developing countries, the telecommunication industry in those countries got a great bound to meet the demand of globalization. As a result, the user of mobile phone which can narrow the distance between people and link the whole world together rose at an incredible speed. On the other hand, the extremely advanced civilization of developed countries means less potential in many aspects including in the area of private telecommunication tools and their demand for further enlargement of such tools tend to saturation.

　　In conclusion, while mobile phones subscriptions, if used carelessly or without restraint, could prove to be a double-edged sword, the fact remains that it is already extremely prevalent in both developing and developed countries and even today, continue rise in popularity. Given the levels of intelligence, prudence and discretion imbued in people, I am sure that most of them will be able to sidestep the potential drawbacks of mobile phones, while taking advantage of all its merits.