
CDMA – CDMA is usually meant to refer to CDMA2000, a family of mobile telecommunication standards that use a multiple access scheme for digital radio to send voice, data, and signalling data (such as a dialled telephone number) between mobile phones and cell sites.
EDGE – Enhanced Data rate for GSM Evolution: EDGE improves on the “packet” data system introduced by GPRS. EDGE is considered a 2.5G mobile communications standard, offering higher data rates than the first 2G GMS systems, but lower speeds than “true” 3G systems such as UMTS. EDGE transmission speeds average from 100 to 130 Kbps.