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What is EDGE related to mobile phones?

Further enhancements to GSM networks are provided by Enhanced Data rates
for GSM Evolution (EDGE) technology. EDGE provides up to three times the
data capacity of GPRS. Using EDGE, operators can handle three times more
subscribers than GPRS; triple their data rate per subscriber, or add
extra capacity to their voice communications. EDGE uses the same TDMA
(Time Division Multiple Access) frame structure, logic channel and
200kHz carrier bandwidth as today's GSM networks, which allows it to be
overlaid directly onto an existing GSM network. For many existing
GSM/GPRS networks, EDGE is a simple software-upgrade.

EDGE allows the delivery of advanced mobile services such as the
downloading of video and music clips, full multimedia messaging,
high-speed colour Internet access and e-mail on the move.

Due to the very small incremental cost of including EDGE capability in
GSM network deployment, virtually all new GSM infrastructure
deployments are also EDGE capable and nearly all new mid- to high-level
GSM devices also include EDGE radio technology. The Global mobile
Suppliers Association (GSA) states that, as of May 2007, there were 223
commercial GSM/EDGE networks in 113 countries, from a total of 287
mobile network operator commitments in 142 countries




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