If you have not activated the administration mode yet, you can do this in the settings of Avira Free Android Security.

Please follow these steps to activate the administration mode:

1. Start the Avira Free Android Security App
2. Go to Settings → Wipe Settings
3. Enable the administration mode
4. Activate administration mode

Please note:
As soon as administration mode is enabled, you can’t uninstall Avira Free Android Security App from your device. If you like to uninstall the App, you first have to deactivate the administration mode. Please find more information in our article: Uninstallation of Avira Free Android Security not possible