Mobile phone has become one of the essential items in our daily life. In Korea, it is estimated that more than 20 million cell phones are discarded each year due to advancement in technology, thus creating disposal and environmental pollution. In order to conserve the resources, their proper recycling is essential as it contains both valuable and toxic metals. The economics of the recycling will depend on the amount and value of the metals. Therefore, it is necessary to determine the composition of the metals present in the different cell phones. In the present study, a report is presented on the variation of metal content per year of waste mobile phones. A review has been made for the mobile phones manufactured during the period 2000-2009 and metal content of the printed circuit boards (PCBs) by analyzing their metals. An example of the precious metal palladium and of the heavy metal lead shows the decreasing trend.