Huawei's mobile phone dual-card call setting card 1 card 2 dialing specific operation steps are as follows:

1. First switch back to the mobile phone desktop, and pull down from the top of the screen to bring up the notification bar.

2. In the drop-down menu bar, click the Settings icon in the upper right corner.

3. After opening the settings, click "Dual Card Management" in the menu bar.

4. In the sub-page of the jump, click to enter "Default Dialing Card".

Finally, from the two installed mobile phone cards, choose the one you want as the default dialing card.