Can Redmi note3 Dual Netcom use Telecom 3g?

At present, Redmi note3 dual netcom can only use telecom 4G to access the Internet in some areas, and can't make phone calls and send text messages. If you only need to surf the Internet, you can enter * # * # 3646633 # * * in the dialing interface, then pull it to the bottom to select the last item, then select FDD, and finally click Settings. If the local network supports it, and your telecom card has been upgraded to 4G, then you can use the telecom card to surf the Internet.