Assuming you don't want to use its built in store to buy and download them...
They have done a nice job of making this nearly impossible. From my experience, you cannot bluetooth them nor install from the SDcard.
This leaves one convoluted method but it DOES work.
Upload the .jar file into an email. Gmail works well for this. Send it to yourself so that it will be in the inbox. Using the phone's browser, navigate to your inbox and view the page in HTML. (In gmail, this option is at the very bottom of the page) Click on the attachment and it will download and install.
As per where to find the apps or games; well, since you found this answer then I know you are just as capable of finding one of the more than 10,000 sites offering free java apps/games for phones.
Note: This is tested and WORKING via Gmail. However in concept it should work from most other emails as well.
Note2: Gmail is free. If need be you can simply create and account to do this with.
With a hammer
At&t
How do you install games in samsung d900i?"
code de install jar sur samsung c3303i
running fred
Just go to the Google Play Store, or Samsung Apps, and search the game you want. When you find it, just click the install button.
You can't install trix in samsung.
we cannot install android os on samsung b5722
that's easy, you use 'install' located on your phone. If you still have problems then we suggest a change of phone. good luck.
http://www.youtube.com/watch?v=Zlm-_lgo45YA YouTube video explaining games to be installed
it depends which samsung mobile it is it works on the samsung galaxy
Yes