Why can't the duck chat card in Maoming, Guangdong use LTE?

The sim card is not installed correctly, or the mobile phone does not support the operator of the sim card.

LET doesn't work. Maybe the sim card is not installed correctly. Plug in the mobile phone card again and restart the phone. If it still doesn't work, it means that the mobile phone doesn't support the operator of sim card, so it is recommended to try another sim card.

Duck Chat is a channel card issued by China Mobile Hong Kong Company. The so-called "channel card" means that China Mobile's own marketing outlets in Hong Kong do not sell this card, and only agents in Hong Kong can buy it.