3G: Third Generation of Mobile phone standard
WCDMA: Wideband Code Division Multiple Access.
wideband spread-spectrum 3G mobile.
GPRS: General Packet Radio Service.
GSM 900 & 1800: are used in most parts of the world: Europe, Middle East, Africa and most of the Asia.
GSM-850 and GSM-1900: are used in the United States, Canada, and many other countries in the Americas.