Update Samsung Galaxy S3 GT I9305 to Official Jelly Bean 4.1.2 XXBLL3 firmware

Samsung Galaxy S3 Android device has received the official Android 4.1.2 XXBLL3 update. But this doesn’t mean that any novice can try to update and accomplish it successfully. You need to know the installation mechanism.

Read this article to understand the manual installation process using it you can find a lot of improvements in your SG S3 device. This is for all the S3 users. The latest Jelly Bean Firmware has been pushed by OTA in limited markets. So, if you fail to receive it on your device and want to install it, our guide will help you to do this update.

Pre-requisites and Guidelines:

• This guide and all the instructions listed here are provided only for Samsung Galaxy S3 model number GT I9305. So don’t try the same for any other similar devices, otherwise your device may get damaged.
• This guide and all the instructions listed here are provided only for instructional and educational purpose. Don’t blame us or hold us liable if you decide to apply the same on your device and during that process you either get it damaged or your data are lost.
• The warranty of your Samsung Galaxy S3 will not be affected or become void as this is an official firmware released by Samsung.
• If your Samsung Galaxy S3 device is rooted or has installed a custom ROM that runs on it, once you install the official update, the warranty will be restored, and the root access will be revoked and also the bootloader will get relocked. If you want to have root access or an unlocked bootloader, you should apply once again for the root/ bootloader unlocking methods that you’re sure is compatible for your device.
• Back-up all your important data that you’ve stored in your device’ internal memory, before going any further. We will use the ODIN app, but if something goes wrong and your device won’t boot, you can lose your vital information.
• For taking back-up of your critical data, you can use dedicated back-up and restore applications that are available on Google Play Store. For saving the SMS, you can use the SMS back-up and restore app, for saving the contacts you can sync your contacts with your Gmail account, note down your internet settings, save the EFS folder. If in your device, a custom recovery image like CWM or TWRP is installed, you can use these to take a full back-up with the NANDROID back-up options.
• Enable the USB debugging option on your device by following the next path: “Settings -> Applications -> Development -> USB debugging”. This operation is necessary in order to assure the connection between the device and the PC.
• Verify if your device has enough power left in its battery. Your battery must be at least 65 charged to complete this operation.
• A Windows based computer, and the original USB cable for your S3 device are required to complete this task.
• Uninstall or disable the Antivirus and the firewall or any other security programs that you’re running in both devices, PC and smartphone in order to be sure that these programs don’t interfere in the this updating process.

Now, you need to download your proper firmware, suitable with your Samsung Galaxy S3 device from the below list:

•  If your SG S3 device is Unlocked / Unbranded download the firmware pack from here.
• If your SG S3 device is in Australian A1 Telekom network, download the Android Jelly Bean 4.1.2 pack from here.
•  For Denmark- Three phone network S3 devices, download the firmware update from here.
•  For the S3 device that is from Cosmote Grece, download the update pack from here.
• For Hungarian T-mobile S3 devices, download the XXBLL3 firmware from here.
• For Poland PLUS network S3 device download the firmware pack from here.
• For Portugal Vodafone S3 devices, download the Android 4.1.2 XXBLL3 from here.
• For Switzerland Swisscom SG S3 devices, download the firmware pack from here.

How to Update Samsung Galaxy S3 GT I9305 to Official Jelly Bean 4.1.2 XXBLL3 firmware- manually method.

1. First of all, download and install the Samsung KIES on your PC and install the proper drivers for Samsung Galaxy S3 device. If you have already installed the drivers in your PC, skip this step.
2. Download and install the ODIN app on your computer.
3. Now, extract the downloaded update file on your desktop PC.
4. Open ODIN app on your PC.
5. Turn off your Samsung Galaxy S3 device.
6. Reboot your device into the download mode. To do that, you need to press and keep holding the Volume down + Power + OK buttons simultaneously.
7. Connect your S3 to your PC, using the USB cable cord.
8. On the ODIN app, you have to see the “added” notification message and the ID:COM section to see it appear yellow or blue in color.
9. In case you don’t see the notification from the ODIN with added message or ID:COM section isn’t colored yellow or blue, disconnect your device from the PC and reinstall the proper drivers once more and after that repeat the procedure from beginning.
10. If everything is OK, from the ODIN click on “PDA” button.
11. Now, browse the Firmware file and load it in ODIN app.
12. Important: Don’t make any changes on ODIN app; make sure that the Re-partition box is unchecked.
13. Now, when you want to begin the update process click on “START” button from ODIN.
14. Wait until the Android 4.1.2 Jelly Bean XXBLL3 firmware is successfully flashed.
15. When the flashing process is done, the ODIN app will display the “pass” message.
16. After the installation is done, disconnect your S3 device from the PC and reboot the S3 device.

Note: If during the flashing process, the ODIN app gets stuck or its interface is frozen, you have to do the following steps:

• First of all, close the ODIN app.
• Then, remove the S3 device’ USB cable from the PC.
• Now, force restart your S3 device.
• Reinstall the proper drivers once again in your PC.
• Re-Open the ODIN app and connect once again the S3 device to the PC.
• Now, resume the step-by-step guide from the beginning.

Note: If your S3 device, at the end of the updating procedure, gets stuck or enter a boot loop, you need to follow the below steps:

• First of all, reboot your S3 device into its recovery mode menu. To do that you need to press and hold the Volume UP + Power + OK buttons simultaneously and release the same when the Recovery Mode menu is displayed.
• From the Recovery Mode menu select “wipe data factory reset” and after that select “wipe cache partition”.
• Now, after you have wiped the cache partition select “+++go back+++” to return in the main menu and from there choose the “reboot system now” option.

That’s all! Now you know everything to update your Samsung Galaxy S3 GT I9305 model no device with the official Android 4.1.2 Jelly Bean XXBLL3 Firmware.

Please test this latest update and let us know in the comment section. Your experience and all your queries will help us serve you better. Feel free to write as many questions as you want. We will provide you the best possible answers.