@Axebitten : well actually there many games u can install on samsung
u can find one if u search on google.
i've tried install the game for motorola V3 on my samsung
many of them didn't compatible with my samsung

i give u 10 game that compatible with SAMSUNG SGH-D840
-Golf Showdown
-puzzle bobble
-pro golf 2007 feat vijay singh
-midnight pool
-chess master
-mini golf revolution pirate
-roller coster rush
-fifa 08
-civilication 3
-XIII covert identity

try to browse this site :
http://www.gamemobile.co.uk/samsung_d840_games.htm

after i activated the code, can i copy games application from my PC to my phone using usb cable and install it on the phone? how can i install it? thanks...

1. Type in the code *#9998*52824678255# (which reads *#9998*JAVAINSTALL# )
2. Your phone should return with 'Activated'
3. create the JAD file with using JAD maker
4. copy the JAR and the JAD file to ur memory card or ur phone memory
try to put it on "OTHER FILES" folder
5. run the JAD file and the phone will ask you if you want to Install the game.

I have downloaded 2 files from the website: 1 is .jad file, 1 is .jar file, but after sent to my Samsung D840, saved under "memory card", I don't know how to activate it to play, please help....

Ok, I have activated. But I still can not open and play the game. How to create the JAD file from the JAD maker? I am so lost...

to create the jad file just drag and drop the the jar file to the jad maker