How To Update Samsung Galaxy S2 LTE I9210 to Official Android 4.1.2 Jelly Bean XXUAMF1 Firmware

This week the Galaxy S2 LTE model number I9210 Swedish users receive the new official Android 4.1.2 Jelly Bean firmware by OTA, namely XXUAMF1 OTA update. If you have not received the update, you can still do it if you follow the instructions mentioned in the file. As you know that an official launch of Android 4.1.2 Jelly Bean released by OTA will be pushed

Pre-requisites:

• After installing the official Android 4.1.2 Jelly Bean firmware, the root access will be revoked, and for re-root it—you should apply a suitable root procedure compatible with the device.
• The warranty for the device will be restored after you’ll install an official ROM to the device.
• The new update will be flashed with ODIN app, so your device doesn’t need to run a recovery image.
• Take the complete data backup.  Save your contacts messages, EFS, call logs history, market apps, and all your important files or settings.
• If your device has installed a custom recovery image as CWM or TWRP recovery, you can take a full backup for your actual ROM.
• A Windows based PC with an internet connection available is required, and also the USB cord and the Samsung Galaxy S2 LTE need to be near of you.
• Disable or uninstall all the security tools such as antivirus, firewalls or antimalware software, these can interfere with the flashing process and can interrupt it.
• On the Galaxy S2 LTE device enable the USB debugging option from here: “Settings -> More -> Development Options -> USB debugging”.
• The device’s battery level should be at least 70 percent. t.
• All instructions work only with the LTE variant of the Samsung Galaxy S2 model number I 9210, so don’t apply them to other device, you can easily brick it.

Use this tutorial only in your own risk. Our team can’t be held responsible for any data loss or damage caused.

How to Install  Official Jelly Bean 4.1.2 XXUAMF1 Firmware on Galaxy S2 LTE (I9210)

1. Download and install the S2 drivers on your PC, you can also use the Samsung Kies application to do this.
2. Download the Official Jelly Bean 4.1.2 XXUAMF1 Firmware package from here and save it on the desktop.
3. Extract the downloaded file.
4. Download Odin, save it into PC, unzip and install it.
5. Run Odin app as Administrator.
6. Power off the S2 device, wait around 10 seconds with the device turned off, before to move to the next step.
7. Now, boot the device into Download Mode, to do this press on Power, Home and Volume Down buttons simultaneous.
8. Connect the Galaxy S2 LTE (I9210) device to PC using the USB cord while it is into Download Mode and the ODIN is running.
9. Now, verify if the connection is established, Odin must to recognize the S2 device and the ID:COM section should be colored yellow or blue and the  “added” message must to be showed.
10. If not, you need to disconnect the S2 device from PC, close ODIN app, reinstall the USB drivers and repeat all the steps from the beginning.
11. Now, select PDA option from ODIN.
12. Browse and pick the update file from PC.
13. Make sure that the re-partition and f. reset time options from ODIN are unchecked.
14. Now, click on “start”.
15. Wait until the new Android 4.1.2 Jelly Bean is applied.
16. When the flashing process is completely done, the ODIN app will display the “pass” message and the ID:COM section will be green.
17. Reboot the S2 smartphone.

Troubleshooting:

If the Samsung Galaxy S2 gets stuck or it is entering in a boot loop you will have to:

1. Reboot the S2 device into Recovery Mode (press and keep holding volume up, power and home buttons at the same time).
2. Now, from the recovery mode select “wipe data factory reset” and “wipe cache partition”.

If the Odin gets stuck during the installation process, you have to:

1. Disconnect the S2 device from PC.
2. Close Odin
3. Reinstall the USB drivers on PC.
4. Force restart the Samsung Galaxy S2, and repeat all the step as mentioned above.

That’s all, you have successfully completed the step by step tutorial.