How to set which card to use for accessing the Internet for Huawei dual-card mobile phones?

When using dual cards, only one card slot can support 4G/3G/2G networks, and the other card slot only supports 2G networks. You can specify 4G/3G card slots according to the network conditions to get a better experience. At the same time, in order to use the SIM card package more reasonably, you can also set the default card for surfing the Internet and making phone calls.

Open "Settings", click "Dual Card Management" or "International Roaming Settings", and set up two SIM cards according to actual needs.