Download and Update Latest Android 4.1.1 Jelly Bean Firmware (I9300XXDLI1) For Samsung Galaxy S3

Again, here is the latest leaks firmware , Base Firmware I9300XXDLI1 after I9300XXDLH9. From the info, I think that this is the most stable leaks Jelly Bean firmware for Samsung Galaxy S3 GTi9300.So, as expected the official version of Android 4.1.1 Jelly Bean is coming as the Samsung Mobile developers team is almost complete and tested this firmware.If you are waiting the Android Jelly Bean official update for your region or country, then you can refer here on on how to check and download. But if  you want to keep test and flash the new leaked firmware into your Galaxy S3, then below is the step by step tutorial for your reference. Before start, pleases make sure that the Galaxy S3 model your are using is GTi9300 and if you are still new with your Galaxy S3 then you can refer here- Galaxy S3 Hints and Tips to get more about your Galaxy S3:

Base Firmware: I9300XXDLI1 (4.1.1)
Region Europe
Country: United Kingdom
Carrier: Unbranded
Build Date: 03 September 2012
Modem: XXLI1
CSC: OXADLI1
Change List: 111170

If you are using Custom ROM, then it is more recommended perform full Wipe before flash Android 4.1.1 I9300XXDLI1 into your Galaxy S3 GTi9300. To perform full wide, then you need power off your Galaxy S3 > hold press the Volume Up button+ Power Button +Home Button to enter the recovery Mode. In the Recovery Mode, select Factory reset or Wide Data.

Step 1: Download  I9300XXDLI1_I9300OXADLI1_I9300XXLI1_BTU.zip file then unzip this file to your PC. Now you will get I9300XXDLI1_I9300OXADLI1_I9300XXLI1_BTU.tar.MD5

Download I9300OXADLI1 for Galaxy S3 (I9300XXDLI1_I9300OXADLI1_I9300XXLI1_BTU.zip ) : Link

Step 2: Set your phones into USB debugging mode: Settings -> Applications -> Development -> USB debugging. Then turn off your phones.

Step 3: Turn your phones into download mode by  pressing and holding Volume Down + Home + Power simultaneously. (What is Download Mode?)
Step 4: Download Samsung Odin (Download Link)Start ODIN on PC.
Step 5: Connect the device to your computer using USB.
Step 6: Wait a few seconds, the ODIN screen will show that a device is now connected- ID:COM boxes.
- If ODIN not detect your device, then you can refer here on how to solve it.
Step 7: Click the PDA button, then select I9300XXDLI1_I9300OXADLI1_I9300XXLI1_BTU.tar.md5.
Step 8: Press “Start”. ODIN will start flash the firmware. Don’t unplug the USB Cable connection during the flash process. Your Galaxy S3 will automatically reboot once the firmware is completely flash into your Galaxy S3.
That’s all!
If you Galaxy S3 have any problem after flash new firmware, them you can Refer tutorial here on how to solve. Besides this, you also can refer tutorial here on how to root and install CWM Recovery into your Galaxy S3.