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, Web Tracking Software manufacturer / supplier in China, offering Satellite Cell Phone Tracker Online GPS GPRS Track for Personal GPS Tracker, 3G Mini Kids GPS Tracker with Sos Emergency Button Voice Communication Listen in Function Real Time Tracking in GPS Google Maps, 3G Personal GPS Tracker with Micro SIM Card GSM GPRS GPS Tracking for Elderly Kids GPS Locator and so on.