Want to update your Samsung Galaxy S3 to Android 4.1.2 Jelly Bean with the latest official firmware i9300XXELLA and correct the serious vulnerabilities of the device? Then what are you waiting for? Here I bring you a step by step tutorial so you can do it right now!

A few weeks ago, Samsung released an update to Jelly Bean 4.1.2 for Galaxy S3 to resolve the vulnerability Exynos that presented the device. However, the flagship still had a serious problem that many called “Sudden Death”. But finally, and after several weeks, this ruling also seems to have a solution. Yes, it is possible to solve the sudden death of Galaxy S3. To do this you must install the firmware XXELLA then follow some steps listed HERE.

However, as just said, the first step is to upgrade to the latest firmware available XXELLA. There are two firmwares available: one that was released for the UK and one for Luxembourg which is newer. In both you can set the language to your liking and show very little variation. Already we showed you how to upgrade to XXELLA of the United Kingdom and now I will show you how to do with the firmware for Luxembourg, the first that has been released in this 2013.

This new XXELLA firmware has the following characteristics:

  • PDA: I9300XXELLA
  • CSC: I9300OXXELL1
  • Android Version: 4.1.2
  • Date: 04/01/2013

Previous requirements:

  • All data such as contacts, SMS, photos, music and videos will be deleted if they are stored in your phone. Please do not do a backup of the data with KIES as it creates the backup in the format (. SBU)  that sometimes has problems in the restoration or does not recognize the phone. Therefore, is strictly recommended that the backup contacts as well as the SMS is performed by following the steps below:
    • SMS – Use SMS Backup y app Restoration
    • Contacts – Sync with Gmail application
    • Songs, videos, files – Copy to SD card
    • Take note of APN and MMS settings in Applications> Settings> Wireless & Networks> Mobile Networks> APN
  • Make sure that all security solutions like firewalls, antivirus and KIES application are completely closed until firmware update finishes.
  • It is very important to make sure you have ADMIN privileges before proceeding to update the phone and the USB port must be open which means you must have read / write so that the firmware can be applied successfully.
  • Note that you will need to charge your phone at least 90% battery to ensure that does not interrupt the update.
  • Never interrupt the firmware update manually, just in case, if interrupted by power failure there is no need to worry because all you have to do is follow the instructions from the beginning.
  • Whatever firmware you currently using, if you have root access you will lose it because it´s an official firmware.

How to make an Android Backup of SMS, Contacts, Apps and Settings?

Update Samsung Galaxy S3 Android 4.1.2 Jelly Bean Official (i9300XXELLA)

It should be noted that from AndroidADN we are not responsible for any damage that may occur to your device during this process. It acts at your own risk.

1 – The first thing to do is download the files you will use for the upgrade:

2 – Then, connect your Galaxy S3 to your PC via the USB cable and place the firmware file on your phone.

3 – Next, unplug the device and turn it off in order to start in download mode. To do this you must press and hold Volume Down + center button and simultaneously press Power. If done well, you should see a green robot, which will tell you entered Download Mode.

4 – Once your Galaxy S3 is in download mode, connect the device to your computer using the original USB cable. There you will see that the section ID: COM is illuminated.

5 – Then in PDA select the firmware i9300XXELLA you downloaded in step 1 and click on “Start” to start the update process. Make sure that Re-Partition is NOT checked.

6 – Once the firmware has been successfully updated, you should get a green PASS on ODIN. Then you must disconnect the USB cable and turn off the device to start it in Recovery Mode. To do this you must press the Volume Up + Home button, and while holding both simultaneously press the power button.

7 – In recovery mode, select Wipe data / factory reset and Wipe Cache partition and then reboot your phone by selecting Reboot system now with the help of the volume keys to scroll.

8 – Success! You can enjoy the official firmware i9300XXELLA  Android Jelly Bean 4.1.2 on your Samsung Galaxy S3 (i9300)!

How about this new firmware? Leave me your feelings in the comments!

Esteban Cejas

Puedes leer todos mis articulos desde aqui o seguirme en Google+ y Twitter desde @Esteban_strato para estar al tanto de todo lo que sucede en el mundo Android.