The cell phone signal boosters are those devices which are used by cell phone users to reduce the no of dropped calls and improve the network coverage. More than 35 % of the people who owns cell phones face the problem of low network coverage and most of them don’t know how to get rid of this problem. These cell phone signal amplifiers are also known as extra antennas because they work like one. They improve the signal strength of the cell phone, no matter where they are used. They can be used at most of the places whether it is elevator, basement, tunnel, highway, home, office etc. They can also be used in cars and other vehicles. A cell phone repeater not only enhances the signals of your cell phone, but also has many add on advantages like it enhances the battery life of your cell phone. It is effective in basements, inside homes and in office buildings also. These boosters also save us from suffering from cancer. Cell phones emit harmful electromagnetic radiations when they look up for signals and these signals are absorbed by the brain and they only are responsible for brain cancer in people. Wi fi signal boosters are the new age boosters which enhance the wi fi applications of wi fi enabled devices.