Here are major telecom networks that has been evolved over a period of time to provide High speed and on time teleservices.
LTE : Long Term Evolution latest currentoly uses in 4G all of below are 3G and older technology
HSPA :high speed packet access used in 3G packet data transmission
EDGE : Enhanced Data for Global Evolution also known as Enhanced GPRS (EGPRS)
HSPA :High Speed Packet Access (Uses WCMDA Protocols to enhance 3G speed)
two sub version :
HSDPA :High Speed Down-link Packet Access
HSUPA :High Speed up-link Packet Access
WCMDA : Wideband Code Division Multiple Access (enhanced Version of CDMA)
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