GS88 do not need use any cell tower, routers or satellites, it uses completely private network, so it is end-to-end encrypted and guarantee the safe communication. As long as the bluetooth connected, the network is stable.
Users could download the off-grid map in APP in advance so that even without 3G 4G signal or Wifi, you could still check the GPS location of your friends and family and when get the urgent call, you could find their location immediately via APP.
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