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GSM releases until R98. Includes voice, circuit switched data, SMS, fax, supplementary services.

GSM releases until R98. Includes 2G + packet data (GPRS) and CAMEL.

GSM (UMTS) releases from R99 (R99, R4, R5, etc.).

Also known as LTE, incorporates VoLTE and data download speeds up to 1Gbps

Wireless telecommunications intersystem data messaging standard used for intersystem operations. Also called TIA/EIA-41; formerly called IS-41.

Access Point

Access Point Name

Authentication Center