When the Beidou/GPS locator displays offline, the first step is to determine whether the device is powered on and observe whether the device indicator light is normal. In the absence of conditions for observation, the status of the SIM card can be checked first. The steps are as follows:

　　When the Beidou/GPS locator displays offline, the first step is to determine whether the device is powered on and observe whether the device indicator light is normal. In the absence of conditions for observation, the status of the SIM card can be checked first. The steps are as follows:

　　If it is an 11 digit phone number, dial the device's SIM card number to see if you can hear the sound of the phone being connected. If it is a 13 bit IoT network card, log in to the management platform to check if the card status is turned on and if the fees are normal

　　Is the vehicle in the basement without GSM network signal coverage.

　　3. Observe the disconnection area to determine whether it is an individual disconnection or a complete disconnection, in order to determine whether it is a network issue with the operator.

　　Is the Beidou/GPS service fee overdue.

　　Has the 5 GPRS service been cancelled (offline on the last day of the month).

　　6. Check the parameter settings to see if the IMEI number and GPRS transmission time interval of the device are correct.

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