1) Click "APN information settings" to set APN parameters
2) After the setting is complete. click "Next"
3) Short press the reset button on the device for one second. The device's yellow indicator light will flash or the device will prompt a sound of "Beep", which means it has entered the APN setting mode
4) The APP will generate the QR code and then use the device to scan this QR code
5) After the device identifies the QR code successfully, it will prompt a notification sound
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