EDGE
Enhanced Data rates for GSM Evolution; effectively the final stage in the evolution of the GSM standard, EDGE uses a new modulation schema to enable theoretical data speeds of up to 384kbit/s within the existing GSM spectrum. An alternative upgrade path towards 3G services for operators, such as those in the USA, without access to new spectrum. Also known as Enhanced GPRS (E-GPRS)
EEPROM
Electrically Erasable Programmable Read Only Memory
EFR
Enhanced Full Rate; a alternative voice codec that provides improved voice quality in a GSM network (see codec)
ESN
Electronic Serial Number; a 32-bit number that uniquely identifies a mobile phone
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