2G scam was of about 24000 crores. Reallocation gave revenue of near about 14000 cr to GOI. But what is this 2G, 3G etc. I would try to explain it in layman's term. First of all G here denotes Generation. Generation of the telephony services. Now who sets the directions and guidelines for the generations. It is done by ITU or international telecommunication union.
I would just enumerate the basic differences over here between these different generations:
In simple words1. 1G was to send voice one way, 2G for text and voice 2 way,2.5 G used GPRS and thus Data also used to be sent by this, 3G basically for data, video along with audio and 4G would be able to send any form of data2.The speed of sending data has increased with each generation with 4G boasting up of data transfer rate of above 100mbps .3. The next thing that separates all the generations is the frequency over which they work. For 1G its 150MhZ analog, from 2G onwards its digital, with 2 G operating at 900 and 1800MHz popularly known as bands, 3G working on above 2000MHz bands and 4G working at variable frequencies.
This chart would provide the basic structure of different generations of telephony.I will discuss CDMA GSM and difference between them in other post. Along with it my next focus would be on 4G also as it was recently in news
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