... even at a weak signal status.Works well even in areas with limited sky view like urban canyons.Support single location ... 850/1800/1900MHz (For the countries: Japan, North Korea, the UK, North America, the five states, Canada, the United States, ... Mexico, Greenland (Denmark), Guatemala, Bermuda (UK), St. Pierre Island and Miquelon (France), Germany.)Network: GSM/GPRSGPS ...