General Packet Radio Service
Phase 1 - Point to Point,
Phase 2 - Point to Multipoint
Terminals:
Class A: Supports GPRS and other GSM services
(such as SMS and voice)
Class B: Can monitor GSM and GPRS channels
simultaneously, but can support only one of
these services at a time.
Class C: Supports only nonsimultaneous attach. The
user must select which service to connect to.