Global System for Mobiles (GSM)

A very brief description of mobile communications and GSM.

1. Mobile Communication
2. Evolution of Mobile Communication 1st Generation Dual Band communications 450/500 MHz during 1964. Features:  Wireless Voice Transmission
3. 2nd Generation Known as GSM First used in Finland in 1991 Uses Frequency Band: 900/1800 MHz Features:  Digital Voice communication  SMS services  Voice Conferencing
4. 2.5th Generation Enhancement of GSM to GPRS in `97 GPRS: General Packet Radio Services Higher data transmission rate. Features:  MMS  Internet Access
5. 2.75th Generation EDGE: Enhanced Data Rates for GSM Evolution in`99 3 GPRS Bands used simultaneously Features:  Speeds up to 384 Kbps  Full internet access on mobiles  Emergency Number System
6. 3rd Generation Launched in 2001 Band Usage: 2100 MHz Features:  Speeds up to 3.5 Mbps  Video calling  Live Streaming  Live Gaming
7. 3.5th Generation  Enhancement to 3rd generation via HSDPA and HSUPA.  Speeds up to 7.2 Mbps  Live Gaming
8. Future : The 4th Generation Speeds up to 5 Gbps while moving at a speed of 100Km/h. Features:  Live TV  Ultra high speed internet access  High Definition (HD) video streaming
9. Prepared by  @Vikram_Tiwari