The disadvantage of the use of mobile phones.1. the use of mobile phones may cause headaches. -Principles of mobile phone signals are converted into electrical voice, before sending out into the air through the wave Palace.2. the call is not stuck or dropped most often causes irritation, mental health decline upset muscles neck shoulders often chakreng because your phone all the time and sometimes to try to tilt the neck and hands attached to the phone, push the ear at all times. The neck muscle kreng is another one that makes a headache.3 coal fire applied to mobile phones contain many types of dangerous substances. Filling the battery in the handset you have to change every 12-18 months time. Filling the batteries used in mobile phones, there are two types of coal: NICAD (Nickel Cadmium Cells) and Hydride (Nickel Metal Hydride Cells), a compound that is used in the first type of charcoal is considered hazardous waste to NICAD construction penalties against people's health and environmental pollution occurred.4 the camera mobile phone. Many found that the camera of a mobile phone is used in waste, such as video clips, cam cam pictures, etc.5 การรบกวนของคลื่นวิทยุ คลื่นจะรบกวนการทำงานของอุปกรณ์ทางการแพทย์ เช่น เครื่องกระตุ้นการเต้นของหัวใจ Pacemaker, defibrillator และอาจจะมีผลต่อการควบคุมการบิน
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