I have a FMB920 device connected to a vehicle and since two days ago it's not showing any tracking information. However, the "last seen" of the device updates regularly. I just can't see any tracks and it shows up as 0.0km despite the vehicle moving.
I know the SIM card number is active and the gps device is not in an area without signal and it's ignition is on. The device doesn't respond to SMS commands.
What can be the problem?