It depends on the kind of phone you have. If you have a phone with a memory card, all you need to do is hook the phone up to a computer, go to my computer and open whichever drive your phone is located on. Then go to Mobile and then to kjava. drop the jar/jad file in and your done. The from your phone, navigate to games/apps, hit the menu button and click ‘switch storage device’. Click on the name of the app you wish to install and click the select key. Follow the on screen instructions and you’re done. This will work on a motorola phone, I am not sure about other phone brands.