Home > Galaxy S3 > How to root and flash custom firmware for your unbranded Samsung Galaxy S3 (GT-I9300)

How to root and flash custom firmware for your unbranded Samsung Galaxy S3 (GT-I9300)

Word of warning

Once you root your S3, your warranty will be void. The only way to restore your warranty is to flash back a stock firmware. (I shall leave it as an exercise for you)


Files needed to root/flash custom firmware

For rooting

– Download both the CF-Root file and ODIN from http://sdrv.ms/LxpTTE and extract them to the same folder

For CF-Root, you can goto XDA to see if there is a newer version

– Download and install Samsung Kies (http://www.samsung.com/sg/support/usefulsoftware/KIES/JSP)


Custom Firmware

– Currently omega rom seems to be the preferred firmware of choice. You can find it at http://kitchen.indieroms.net


Rooting your S3

  1. Make sure you backed up everything you need from your S3 before you do this. You can use apps like SMS Backup and Restore and Titanium to do the necessary backup
  2. Power down your phone (Press and hold the power button then click on Power Off)
  3. Boot into download mode by pressing and holding the following keys together: Volume Down + Home + Power
  4. Once it is in download mode, connect your phone to your PC
  5. Run ODIN and ensure that you see a device connected (See the black circle). If nothing appears, confirm that you have installed Kies properly
  6. Make sure ONLY Auto Reboot and F.Reset Time is checked
  7. Check the checkbox beside PDA and click on the PDA button to select the CF root file
  8. Click on Start to begin the rooting process
  9. The messages box will show the processes taking place during root. If at anytime the process hangs, just pull out the battery and start from step 3 again. The whole process should take at most 4 to 5 minutes.
  10. Once the rooting is complete, the phone will auto restart and you will see a CWM and SuperSU app inside your applications list.

Flashing Omega Rom

You can refer to the steps found at http://kitchen.indieroms.net/blog/?page_id=541

Categories: Galaxy S3
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