Verify Location, a UK company that specializes in offering tracking services to the public, is now offering the Sazo GSM. About the size of a matchbox, the Sazo GSM broadcasts its geographic location to an internet site where it can be tracked and monitored. Unlike GPS tracking devices like the TrackStick, this Sazo model uses cellular phone frequencies to determine its location, making it feasible for use in enclosed areas. In addition to tracking, the Sazo GSM offers services similar to a cell phone, like receiving calls and sending emergency SMS messages. Unfortunately, the device and service are only offered in the UK, so you'll have to find another way to determine if your girlfriend really spends her nights volunteering at that homeless senior citizen blood drive she's always talking about.