Most people from us don't know about the radiations emitted by cell phone, and their cause on our body. Mobile companies invest huge amount to show surveys which say that there is no harm of cell phones on our body but reality is too far. Radiations emitted by cell phones are weak, but their continuous emission near our body can cause serious effects. You can check radiation level of your phone by pressing *#07# on your mobile, it should be less than 1.6. I am sharing a link which tells about effects and prevention from radiation caused by mobile.
http://empoweredsustenance.com/cell-phone-radiation/