The default phone or dial app on the Huawei smartphone can be changed at any time to take advantage of the different features of other phone or dial apps. More phone apps can be downloaded from the Google Play Store.

Android 10 | EMUI 10.0
Step 1:  Open the  Settings
Step 2:  Tap on  Apps
Step 3:  Tap on  Default apps
Step 4:  Tap on  Phone app
Step 5:  Choose the  default Phone app
  1. Open the Settings
  2. Tap on Apps
  3. Tap on Default apps
  4. Tap on Phone app
  5. Choose the default Phone app

Huawei Instructions