There are a few ways to open RAR files on Android. The first way is to use the File Manager. To open the File Manager, open the Settings app and select “File manager.” From the File Manager, select “Rar” and then select “Open.” The second way is to use a file manager application. To open a file manager application, open the Settings app and select “File manager.” From the File Manager, select “Rar” and then select “Open.” The third way is to use a third-party application. To open a third-party application, open the Google Play Store and search for “Rar Opener.”