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Update Galaxy S2 LTE (I9210) to Official Jelly Bean 4.1.2 XXUAMF1 Firmware

The Sweden users of the Galaxy S2 LTE model number I9210 can enjoy the new Android 4.1.2 Jelly Bean OS, as Samsung just released the XXUAMF1 OTA update. But since we are talking about an official launch of the JB 4.1.2 firmware, the OTA will be offered in phases which mean that not all the Galaxy S2 LTE users will receive the notification at the same time. Also, only the Sweden users are getting the software so far, so for the other users a manual update procedure will be required.

If you need to manually update your LTE Samsung Galaxy S2 to official Android 4.1.2 Jelly Bean OS (dubbed as XXUAMF1) then I recommend you to follow and complete this step by step guide which will easily take you through the installation procedure. As mentioned a manual update operation is required for those who are tired of waiting for the OTA notification, if you are not a Sweden user, or if your smartphone is rooted or installed with a custom ROM firmware (on rooted devices the OTA releases can’t be received or flashed).

Manually updating your LTE Galaxy S2 I9210 is not hard as the procedure is official which means that Odin will be used. Odin is a custom tool developed and launched by Samsung and also used on these types of operations. So, don’t worry you can safely use Odin for updating your S2 to stock Jelly Bean 4.1.2 XXUAMF1 software. Anyhow do check all the lines from this tutorial as you might end up in having problems. Even though you will flash an official ROM, this is still a manual process which must be properly performed – messing things up might lead to a bricked Galaxy S2.

First you should know that in case you have a rooted handset, after flashing the Android 4.1.2 OS, the root access will be revoked (don’t worry though as the guide is compatible with both rooted and locked LTE SGS2). The best is that the warranty will be restored and the default version of Android (the latest in our case) will be reinstalled. So, after dealing with this operation you will have to re-root your phone but only by following a method that is suitable with the new JB 4.1.2 XXUAMF1 firmware.

Since Odin will be used, your handset doesn’t need to run a custom recovery image; actually you will flash the software via Odin not by using the recovery image. The only thing to do before starting the update procedure is to backup the Galaxy S2 data. Your personal info might get corrupted or erased so it will be a good idea to backup EFS, contacts, messages, call logs, market apps and everything else you might need afterwards. If your phone is rooted and installed with CWM recovery, make a Nandroid backup too and save the current ROM.

Then, ensure to have access on a Windows based computer or notebook. Odin will be installed on the mentioned device so your S2 and its USB cable must also be there. On the computer, in order to avoid the unpleasant situations deactivate the security settings and protection. Due to same considerations, on your phone enable the USB debugging option (“Settings -> More -> Development Options -> USB debugging”) and charge the battery of your device if there is less than 60% power left.

The Android 4.1.2 Jelly Bean XXUAMF1 update is not a major OS improvement though several bug fixes and new features and apps will be installed on your LTE Samsung Galaxy S2. There is no word about an Android 4.3 release, though the rumors are stating that Android 4.2 is the last firmware that will come to the Galaxy S2; it seems that from now only custom ROMs will be made available for this device.

Now, do note that this step by step guide is compatible only with the LTE variant of the Samsung Galaxy S2 model number I 9210. So, apply the next steps for installing the JB 4.1.2 XXUAMF1 firmware only on the mentioned Android based device.

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

  1. On your computer the S2 drivers must be installed. If not, install the same now by using Samsung KIES.
  2. Then, download the update package from here.
  3. Save the file on desktop and unzip the same.
  4. Download Odin.
  5. Unzip the program and install Odin on your computer.
  6. In the end run Odin.
  7. Turn off your phone, completely – turn it off and wait a couple of seconds before completing the next step.
  8. Now, press on Power, Volume Down and Home buttons at the same time.
  9. The download mode will be displayed.
  10. Take the USB cable, plug it in and connect your smartphone with your computer (on which Odin must be running).
  11. Once the connection establish, Odin must recognize your S2: the ID:COM section should be yellow or blue and the “added” message must be displayed.
  12. If not, try to: unplug the USB cable, close Odin, reinstall the drivers and repeat the steps from above.
  13. From Odin select the option named “PDA”.
  14. Pick the update file from your computer.
  15. Leave the re-partition and f. reset time options unchecked.
  16. Click on “start”.
  17. Wait while the Jelly Bean OS is being applied.
  18. When the process stops, on Odin the ID:COM section will be green and the “pass” message will be displayed.
  19. Good job, you are done -> reboot your handset.
  20. If the Galaxy S2 gets stuck in a boot loop you will have to reboot in recovery: press and hold volume up, power and home buttons. From recovery select “wipe data factory reset” and “wipe cache partition”. Done.
  21. Also, if Odin gets stuck while installing the XXUAMF1 Firmware do: unplug the USB cord for disconnecting the devices, close Odin, reinstall the drivers on your computer, force restart your SGS2 and repeat the update procedure from step 1.
  22. For resolving any other issues use this dedicated step by step guide.

Congratulations; you have successfully updated your LTE Samsung Galaxy S2 I9210 to official Android 4.1.2 Jelly Bean XXUAMF1 firmware. So, you have completed the tutorial which means that we are done for today. Do share your experience and thoughts with our team and with other users that might want to use this guide by using the comments field from below. If there are problems we will assist you as soon as possible.