Support for data transmission, originally limited to 9.6 kbps but later improved through upgrades like GPRS and EDGE .
Primarily high-quality digital voice calls and SMS. GSM – Architecture, Protocols and Services
GSM uses a layered protocol structure for communication between the mobile station and the network: Support for data transmission, originally limited to 9
Handles authentication, security, and location tracking. Support for data transmission
Includes features such as call forwarding, call waiting, and multi-party conferences.