GPRS
General Packet Radio Service – General Packet Radio Service is a 3GPP-specified packet oriented mobile data standard on the 2G and 3G cellular communication network’s global system for mobile communications. GPRS was established by European Telecommunications Standards Institute in response to the earlier CDPD and i-mode packet-switched cellular technologies.
GSMA
Global System for Mobile Communications Association – Organization that allocates official IMEI number ranges to all manufacturers of 3GPP compliant devices and records these ranges and device model information in a database.