Download Free NBA Jam HD game for galaxy y or any qvga phones.
Download the apk from HERE
download data for sdcard from HERE
(XTRACT WITH ANDROZIP ROOT MANAGER)
install the apk
now kill apps and open the game
it will ask u to download the data click yes.and wait for 10 seconds after download starts and the stop download and close game.
now connect cell to pc.. and go to android/data.. an new file with a similar name will be created.. copy name of that file and delete it now.. rename the extracted file with that name
now dissconnect ur cell and go to manage applications and clear the game data.
now open chainfire 3d and use qualcomm plugin with reduce texture quality and size.
now start the game and ENJOY!
**Do exactly as instructions otherwise it will not work**