126
A: Possible causes:
Check if the SIM card is normal.
Check if the SIM card is not in service.
Check if the 3G/4G antenna is connected as intended.
Check if the 3G/4G signals are strong enough.
Try out with another SIM card.
20)
Q: 3G/4G platform is not online.
A: Possible causes:
Check if 3G/4G dial-up is normal.
Check if local active registration is correctly set up.
Check if the sever terminal is correctly set up.
21)
Q: No GPS data.
A: Possible causes:
Check if the GPS antenna is connected as intended.
Make sure the GPS antenna is in a place where signals are not blocked.
22)
Q: GPS drifting and produces speed for no reason.
A: Possible causes:
Weak GPS signal.