1. Once you click the above button ,
it shows a link to download that particular APK file. Save this file on your phone. You may see a warning message displaying "This type of file can harm your device," accept it.
2. If your device browser doesn't allow opening a file just after downloading, open the file manager and go to the Downloads folder you will find Ozone apk.
3. Tap on the APK file you downloaded to install. Allow the required app permissions to install if asks. Now click on INSTALL.
4. You will see a confirmation when the app is installed successfully, and your app is visible in your list of installed apps.