1. Download Firmware and Multiloader from the site first
2. Make sure Samsung PC Studio is installed and communicates with your phone
3. Unrar the firmware in a folder you can easily find it.
4. Remove the Sim and MicroSD from your phone and replace the battery.
5. Now press vol top button+camera key+powerbutton at the same time in switch off mode without attaching the datacable.
6. Soon u will see a new screen which says Download.
7. Now attach the datacable to the phone and open Multiloader which u donwloaded earlier.
8. Select the radio button that includes MSM6250/MSM6250A or BRCM2133 for S5230/5233 (Samsung Star)
9. Select Boot Change,Full Download and master rom boxes.
10. Then click Boot, and select the boot files from the unpacked firmware folder.
11. Click the Amss, Rsrc1, and Rsrc2.
12. Select (Low).r2c NOT (Mid).r2c. (Phone may not restart if you select mid)
13. Then press the Factory FS tab, and select the appropriate file from the firmware folder also.
14. FOTA and ETC fields are left blank.
15. Click the Port Search button, it will find your phone and show the com port is ready.
16. Click the download button and be patient, this will take a few minutes to complete.
17. When it's finished, it will show "ok complete".
18. Unplug the phone from the USB cable, reinstall the sim, MicroSD, and power up the the phone.
19. Now with every thing complete, You can perform a hard resetby typing *2767*3855# into the hand set (but not necessary.)
20. When the phone resets type *#1234# into your handset to check your new firmware ver.
your new Firmware is updated and ready to use.
Make sure NPS is closed otherwise it will automatically read the usb and cause the
installation to stop and error with this message;"Serial port detect error!" If that happens
simply close NPS and click "Download" again. Wait for it to insall and finish.