Download this "
LJ7 Full Odexed Version" and place it on either your internal or external sdcard.
Shut down the phone. Press and
hold volume
UP, power and home buttons simultaneously. Release all 3 buttoms as soon as you see the word Samsung on the screen. Your phone will go into recovery after a small wait. Then follow the directions below in the order shown.
1. From the home menu, select "wipe cache partition" and confirm by selecting yes.
2. Select advanced menu.
3. Select wipe dalvik cache and then confirm by selecting yes.
4. Return to the home menu
5. Select "install zip from sdcard"
6. Select "choose zip from sd card" or "choose zip from external sdcard".
7. Select the file "LJ7_update_FULL_Odex.zip" and select yes to confirm. (if you don't see it, swipe the screen to scroll up and down)
8. After it completes, go back to the home menu and select "reboot system now".