How about Xiaomi custom machine of Unicom?

The network standards supported by Unicom Xiaomi 2M custom machine are Unicom 3G(WCDMA) and Unicom/Mobile 2G(GSM). Mobile 3G networks are not supported, and mobile cards are ok, but only in mobile 2G networks.

Unicom card can be used to support the use of Unicom 3G/2G network.

1, use Unicom 3G package or number to open 3G traffic package and other services;

2. The mobile phone terminal supports Unicom 3G network;

3. If the location is within the coverage of Unicom 3G network, you can use Unicom 3G network.