. "MS GSM" . . . . "started to shut down their GSM networks" . . . . . . . . . . . . . . . . "GSM" . . . "mobile networks" . . . "GSM-gateway" . . . "GSM channel" . . . . . "gsm" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "wireless communications" . . . . "GSM#GSM security" . . . "GSM 2G" . . . "Mobile" . . "Global System for Mobile Communications (GSM)" . . "GSM-1800" . . . "900MHz GSM" . . . . . . . "standard base station" . . . . . "GSM CSD" . . "GSM/GPRS/EDGE" . . . "GSM standard" . . "GSM (Global System for Mobile Communications)" . . . . . "GSM900" . . . . . . . . . . . . "global System for mobile communications" . . . . . . . "''Groupe Sp\u00E9cial Mobile'' (Global System for Mobile Communications or GSM)" . "Groupe sp\u00E9cial mobile" . . "GSM-gateways" . . "GSM mobile communications standard" . . . . . . . . "GSM1900" . . . . . . . . . . . . "Dualband" . "2G GSM" . . . . "2G" . . "GSM" . "GSM#Radio_interface" . . . . "GSM 900/1800/1900" . . . . . . "Global System for Mobile communications" . . "GSM-900" . . . . . "3G/GSM" . . . . . "standard base stations" . "GSM 900" . "Quad Band GSM" . . . "850 MHz UMTS, HSDPA" . . "Standard GSM" . . . . . . . . . . . . . "GSM900/1800" . "GSM technology" . . "GSM (mobile)" . . "1991" . . . "Global System for Mobile Communications" . . . . . . . . . . . "Mobile Phones Communications" . . . "GSM network" . "services" . "GSM/3G Mobile Service" . . . "GSM mobiles" . . . . . . . . . .