Why does the text message sent to the car location tracker device not reply?

Through SMS we can send remote commands to the car location tracker device. For example, if we want to know the status of our locator, as long as we send the status instruction SMS to the device, we can receive the SMS reply from the device, but sometimes we can not receive the SMS reply.

So why doesn't sending a text message to the car location tracker device receive a response?

There are four reasons why a user cannot receive a reply when sending an SMS message to the car location tracker device:

1. The card of the device expires, and the device has no phone charge

The card in the locator must have a phone charge, if there is no phone charge, it will stop, so it will lead to SMS not sent out, also can not receive messages sent by others.

2. The SIM card of the device is not enabled with SMS function from the very beginning

The locator must be enabled in the SIM card SMS function, the command will be effective. If the locator SIM card is not enabled with SMS, the locator will not respond no matter how we send the command.

3. The content of the message is incorrect

The short message sent to the device must be entered in English. If the user sends a short message in Chinese, the content of the short message cannot be recognized.

4. The number of the SIM card that sends the SMS message is incorrect

Sending a text message to a device is just like sending a text message to a friend. If you send a text message to the wrong number, your friend will not be able to receive your message and will not receive a reply. So when you send a text message, make sure you send it to the correct number.

5. The card stores too many signals

The locator should clear the stored information in the card regularly, otherwise too much information in the card will cause the locator to receive instructions.

Of course, if the above five cases are excluded, the message still did not reply can not ask the business to change the card, or let the business help check the locator problem.

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