Before revision: Overview A virtual base transceiver station (VBTS) is a device for identifying the international mobile subscriber identity (IMSI) of a nearby GSM mobile phone and intercepting its calls .
After revision: temporary mobile subscriber identity (TMSI),, some are even advanced enough to detect the international mobile equipment identity (IMEI)Overview A virtual base transceiver station (VBTS) is a device for identifying the international mobile subscriber identity (IMSI) of a nearby GSM mobile phone and intercepting its calls .