3G version works in US. NZ. AU, JP and SG due to these countries has been cut off the 2G network.
2G version works in most area just these place still has the 2G network.
Car GPS Tracker, Personal GPS Tracker, Health Care manufacturer / supplier in China, offering Personal GPS Tracking Device with Big Sos Button, Real-Time Online Tracking Hidden GPS Tracker for Kids, GPS Personal Tracker, Integrated with 3D G-Sensor and Alarm When Falling/Motion and so on.