Definitions for "GSM 900"
Global System for Mobiles.co.uk Ltd - synonymous with Vodafone and O2
GSM networks operating at 900 MHZ.
GSM 900, or just GSM, is the worldâ€(tm)s most widely used digital network (see general explanation for GSM)
GSM 900, called GSM, is the most widely used digital network and now operating in more than 100 countries around the world