what is 2G?
i want to know the exact defination of 2G?

2G
Its the migration from 1g analoge to 2g digital technology. In the early 1990s, second generation (i.e., digital) cellular systems began to be deployed throughout the world. Europe led the way in 1990 with the development of GSM (Global System for Mobile communications), the Pan-European digital cellular standard. The purpose of GSM was twofold: to upgrade transmission technology and to provide a single, unified standard in Europe. Because there were so many different first generation systems. it use TDMA/CDMA as its multiple acces method and include GSM/DCS/IS-136/IS-95