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FAQ for product parts

2025-01-16

Q:Startup Fail?
A:Check the battery charge full or not.

Q:The device cannot obtain location information?
A:Place the unit at the open area to test.

Q:How to choose SIM card?
A: the SIM card must support GSM&GPRS,and ensure that the card has enough currency and credit. 3G device use 3G SIM card, 4G device use 4G SIM card.

Q: How to use in the foreign countries?
A:please set the APN before use,please edit the text “APN123456 CMNET “ and send it to the SIM card of the device,CMNET is Chinese operator’s APN, Replace the corresponding APN when use in other countries, APN details, please consult your local SIM card carrier.

Q : After making a phone call to the unit, no SMS is received.
A : 1. Battery is low. Charge the unit with 12V external power for at least half an hour;
2. Make sure the unit is already connected to GSM network. Here are total three conditions for led lights as following:
Flash----GSM/GPRS conversation start
Continuously in bright status----No GPRS signal
Green Led off----Power off or in sleep mode
3. SIM card has run out of credit. Please top up the SIM card;

4. SIM card doesn’t have function of displaying incoming call number.

Chongqing Changjian Technology Co., Ltd.

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