Part 1 - Clean flash of XXKB3(Skip Part 1 if you have already on XXKB3)
1. Download and run odin.
2. Check Re-Partition, Auto Reboot and F. Reset Time.
3. Click PIT button and select this file: latona_20110114.pit
4. Put your phone into download mode: Press Volume down + OK + Power.
5. Connect USB cable and the program will detect the phone's Com number.
6. Click Start button to download the PIT file to phone.
7. After it is Done Click on Reset button, then unselect Re-Partition box.
8. Click PDA button and select this file: I9003xxxxx-xxx...-PDA-low-CL890053.tar.md5
9. Click PHONE button and select this file: MODEM_I9003xxxxx_REV_00_CL889972.tar.md5
10. Click CSC button and select this file: GT-I9003-CSC-xxxxxx.tar.md5
11. Remove the battery, then enter Device into Download Mode again.
12. Click Start button to flash these files to phone.
13. Do not touch anything till you see PASS on the program window.
14. Just do a factory reset after flashing using recovery
Part 2 -
1. Install CWM.
2. Copy the custom ROM into your external sd card.
3. Boot into your Clockwork Mod Recovery
4. Choose install zip from sdcard ==》 choose zip from sdcard ==》Then select OsmanFans_v1.x.zip to install. (Notice that if you want to select anything, please use MENU button but not HOME button!)
5. After the installation is complete, reboot and you will now have the OsmanFansRom installed.
6. Calibrate battery.
7. DONE!!