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How to switch dialing for Huawei dual card?

The operation steps are as follows:

1. First, you need to 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.

Finally, choose one of the two installed mobile phone cards as the default dialing card.