Genration of wireless technology

1:) 1G
     First genration of wireless technology. It can be introduced approx 1980. The speed is about only
    2.4kbps. The quality of voice and speed is so poor on that time.

It can be used analog signal.

2:) 2G
     Second genration of wireless technology. It can be introduced in 1991. The speed is about only
     64kbps. The quality of voice is more improve than 1G and speed is much higher than 1G.

The
     main difference is it can use digital signal insted of analog signal.

3:) 3G
      Third genration of wireless technology. It can be introduced in 1998. The speed is about            
      minimum   0.2mbps and maximum 2mbps. Later it can be improve like 3.5G, Hsp and the speed
      is about 21mbps.

It is have higher speed than 2G. You can also use 3D video calling.

4:) 4G
     Fourth genration  of wireless network technology. It can be introduced approx 2010-2011. The
     speed is about 100mbps. You can use HD video call, HD call. You access high speed.
      

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