In general, this situation can be 1, take the device to an open place, become yellow (or green) color can be used 2, turn off, turn on, become yellow (or green) color can be used 3, turn off, take the card off, plug it back in, turn on, become yellow (or green) color can be used 4, if still not, try to insert the card on the phone, boot test, if the card shows no signal or error, It is recommended to consult the business hall if the card is normal, it is recommended to replace a traffic card to the portable WIFI test, if it is still faulty, the equipment is faulty, it is recommended to send repair or send warranty
Reasons and Solutions:
It should be that the driver of the portable wifi card is broken, or the wireless card is broken, and the normal wireless card is detected
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The hardware reason is that the network card is broken, the software reason is that the driver is not installed, or you have disabled the wireless network card.
Portable WiFi has been a red light, often indicates that there is no wireless signal, that is, no network signal means, then you need to change a position to see if it is normal anyway is always red, it is no signal, it prompts you to write two words above is the wireless number, you can see the two words. So you need to change positions and try again.