Device has wboded LTE modem along with GNSS function. In order to receive the GNSS signal, an antenna is required. There are two types of GNSS antennas: active gnss antenna and passive gnss antenna. The AG-702 supports both types of antennas, but in order for the active antenna to work properly, it is necessary to start powering the active antenna. To do this, you need to go to System > Custom Commands and select the command Turn GPS antenna to active mode.
Also on this page, you can test whether the GNSS is working properly. To do so, you need to click Activate GPS on ttyUSB7 and then Show GPS location.