Read the passage given below carefully and answer the following questions.Where are the radio transmitters located? We are living in the age of technology. The whole world is taking a new shape with every fraction of time. It has resulted to globalization. There are a lot of new means of communication which have made our life so simple and easy going. Mobile phone is a revolutionary step in the field of tele-communication. Mobile phone has completely changed the concept of the telephoning. Now a phone is not only a mere phone but it is also a lot in itself. A mobile phone works on a unique networked system which needs no wiring, no fixation and no botheration. Originally it was used in cars, airlines, and passenger trains but now it is becoming ubiquitous. It is basically low- power radio telephone. In this magical system calls go through radio transmitters that are located within small geographical unit which are known as cells.