Do You Know what is Spectrum

Hello Friends,
                       This is a small information on spectrum


Introduction
                             The word spectrum means the amount of wireless services delivered to people by a telecom company.The spectrum is divided into "FOUR GENERATIONS"
1'st Generation

                    This generation is known as first generation of communication also called "1G" in short. In this the communication is only done through talking and messaging. it was the first means of communication used in old 1981's

2'nd Generation

                   This generation is far more better than 1G because it helps mobile users to use internet and colour messaging through their gprs enabled mobile. It was introduced on 1991
3'rd Generation
                   This generation is the now latest generation used now.It helps people talk through phones face to face using inbuilt front camera of mobile and 3G enabled.but its a bit costly now for common people. 3G was introduced in 2001
4'th Generation
                    This was introduced in 2009 and is not yet been used widely. In my views it will cost more than using 3G. Even though it helps people to download or browse faster without waiting for longer times.