However, if every students or everyone uses cell phone too much that makes bad for health. In the research of Songkhanakarin University (2001) revealed about effect of mobile phone radiation on human health that eflect of mobile phone are bad for health such as cancer, short sighted and etc. Moreover, Hardell 2010 adds effect of mobile phone will be show when users use mobile phones more than ten years that make start of tumor in brain or in the science called Neureopithelial Tumors'. Although, many results from research can't indicate the cell phone is totally bad for heath, the most of science concluded effect of mobile is very dangerous.