Detect a 2D BeeTagg, QR-Code or Datamatrix by taking a photo and detecting it. The BeeTagg Reader will take you to the contained information by launching the phone's browser with the corresponding...
Check that you have enabled Settings -> Security -> Unknown Sources in Android 4.x or Settings -> Applications -> Unknown Sources in Android lower than 4.x
Download APK file to SD card and run in your mobile browser "content://com.android.htmlfileprovider/sdcard/filename.apk" or "file:///sdcard/filename.apk"