What is the full form of GSM ?

GSM - Global System for Mobile Communications

Global System for Mobile Communications, is a standard set developed by the European Telecommunications Standards Institute (ETSI), as a replacement for first generation (1G) cellular networks.

Technical Details - GSM uses narrow band TDMA, that is 30 kHz wide and 6.7 milliseconds long, split time-wise into three time slots which allows eight simultaneous calls on the same radio frequency.

Features provided by GSM Cellular Network :-

• Short Message Service (SMS) for text messages
• Authentication and security to make phone calls more secure
• Call forwarding
• Call waiting
• Multi-party conferencing