GPRS is a packet oriented mobile data service on the 2G and 3G cellular communication system's global system for mobile communications (GSM). GPRS was originally standardized by European Telecommunications Standards Institute (ETSI) in response to the earlier CDPD and i-mode packet-switched cellular technologies.
Enhanced Data Rates for GSM Evolution:
EDGE is a digital mobile phone technology that allows improved data transmission rates as a backward-compatible extension of GSM. EDGE was deployed on GSM networks beginning in 2003 - initially by Cingular (now AT&T) in the United States.
Wideband Code Division Multiple Access:
WCDMA is an air interface standard found in 3G mobile telecommunications networks. It is the basis of Japan's NTT DoCoMo's FOMA service and the most-commonly used member of the UMTS family and sometimes used as a synonym for UMTS.
High-Speed Downlink Packet Access:
HSDPA is an enhanced 3G (third generation) mobile telephony communications protocol in the High-Speed Packet Access (HSPA) family, also dubbed 3.5G, 3G+ or turbo 3G, which allows networks based on Universal Mobile Telecommunications System (UMTS) to have higher data transfer speeds and capacity.
Evolved UMTS Terrestrial Radio Access Network:
E-UTRA is the air interface of 3GPP's Long Term Evolution (LTE) upgrade path for mobile networks. It is a radio access network standard meant to be a replacement of the UMTS, HSDPA and HSUPA technologies specified in 3GPP releases 5 and beyond.