If you want to install apps or .apk files from unknown sources outside of the PlayStore, we receive a security warning from the Huawei smartphone that you may endanger the system and this can be specified in the settings. Here you can allow third-party apps to be installed.
- Open the settings
- Tap on Security
- Tap on More settings
- Tap on Install apps from external sources
- Choose an App
- Activate or deactivate Allow app installs