Dashchira, Tepra 
Manikgonj 
15.02.2019 

Dear Opu,

As salamualaikum. Hope you are fine with the blessings of the Almighty Allah. Today, I want to share my views about the excess use of mobile phone with you. In today's fast-moving and globalize world it is almost impossible to imagine our day-to-day life without mobile phones. But there are certain harmful health effects which might be caused by immoderate use of cell phones. The most menacing problem is the connection between cell phone and cancer. It is reported that people who talk on the phone for several hours a day are 50% more likely to develop brain cancer. The reason for this is the radio waves produced by mobile phones. It is calculated, that every minute of use the human brain receives about 220 electromagnetic impulses, which are not necessarily harmful, but which definitely affect the brain in cases of prolonged impact. Besides cell phones can cause headaches, decreased attention, shortness of temper, sheep disorders and depression. 

I believe you will understand it by now and make the proper use of your valuable time in study. 
No more today convey my 'Salam' to mother and father and love to the younger. 

Your loving 
Md. Tarek