5. Install APK
How to install the APK?
where its located?
Are you that new to Android..did you just get your first phone?
Connect your device to your computer by USB cable, wait for it to be recognized, go into whatever you use for a file manager on your computer, and drag/drop the file or folder you need to the appropriate place on your device...such as it's SD Card.
Mmmh.......if QATARY is new on Android, I think that he can't install this.apk without enabling the unknown sources option.......
I haven't JB 4.3 but the procedure should be this:
On your phone, go to Settings.
Scroll to Security and lock screen, then tap on it.
Tap on Device administration.
Tick the Unknown sources checkbox to allow your phone to install apps from sources another than the Play Store.
Click OK on the window that contains the warning message of installing third-party .apk apps.
....but we are O.T. here !