BolyGuard 31891, User Manual, Page: 50 / 104

50
Code Meaning Description
3939 Failed to open Possible cause:
3941 network; 1. The GSM network is not good or not well
3942 Network not covered with the GPRS network.
deactivated; 2. The instability in signal transmission leads
Network error to some MMS setting parameters missing when the
GSM base station do the data analysis. If for the
incorrect transmission reason, the camera may show
various error code.
Suggestion:
1. Contact the network provider if the GPRS network is
well covered in that area.
2. Change a place to try again. It’s better to try in a
public place, where there is always good signal.
3. If the provider said there is GPRS signal covered but
the signal is weak, you can try to use a enhanced
antenna that is SMA type with antenna gain of 10db.
-85 Not enough balance Possible cause:
in SIM card; 1. The SIM card is not enough balance.
MMS setting error; 2. Not correct settings.
3.The GSM network is not good leading to a timeout
problem (very small probability).
Suggestion:
1.Please check to make sure your SIM card has enough
balance.
2. Please check the MMS settings
Other error code Many codes in the list are used for debugging in the
product design phase. Most of them will not be shown
to consumers, so please ignore the other error codes
and contract us directly. Thanks.