Samsung just released the J400FPUU2ARK6 update package for the Galaxy J4 in Russia. The software is OTA available and should be anytime received on your device as a new Android notification. However, you can also choose to flash the same update manually as the OS package can be downloaded from online sources. And in that regard we are here for you – the guidelines from below will describe this flashing procedure that should be followed for successfully update your Samsung Galaxy J4 to the latest Android build.

The J400FPUU2ARK6 firmware represents the latest Android OS available for the Samsung Galaxy J4. The software comes along with the December 2018 security patch but isn’t a major OS improvement. In fact, this is a minor update that comes to address some recently reported issues and to secure the overall Android system. Basically, the software brings essential bug fixes and stability improvements along with important security upgrades, everything for the best Android UI that can be used on the Galaxy J4. Of course, we strongly recommend you to apply the J400FPUU2ARK6 software, even if you plan to tweak your Android device afterwards.

Do note that the OTA can be received only if your smartphone runs on stock Android OS. If root was gained or if you flashed a custom ROM you won’t be able to apply the December 2018 Security Patch ‘by air’ – in that case you will have to follow the manual update solution. And when doing so you will restore your handset back to its factory state meaning that in the end the root access will be revoked, the bootloader relocked, the stock recovery reinstalled and bloatware re-applied. However, due to same reasons you can use the manual update operation as a dedicated troubleshooting solution that can help you fix the most common Android software related issues such as boot loops, lags, hangs, screen freeze, battery drain, heating problems, total blackouts, signal strength problems and similar other malfunctions.

Manually setting up the December 2018 Security patch can be done by using Odin. This flashing program is developed by Samsung so you won’t be using a third party app or any other risky platform. Moreover, you will complete an official operation meaning that during the J400FPUU2ARK6 installation process you won’t lose your Galaxy J4 warranty or access to built-in apps.

But, a backup is first recommended – since you have sensible data saved on your Samsung Galaxy J4 the best is to be precautious. And in that regard a dedicated backup operation can help you secure your contacts, call logs, texts, images, videos, audio files, market apps, internet settings, calendar info, saved passwords, EFS folder or IMEI / NVRAM data. Saving personal files can be quickly handled as Samsung already pre-loaded cloud services on your Galaxy J4 while there are other dedicated solutions that can be applied: you can choose to sync files with your Google Account, you can use an external storage device or you can download already tested backup and restore apps from Google Play.

Be aware that a computer will be needed during the steps from below. On your computer you will have to install and run Odin for resuming the December 2018 Security patch flashing operation. Your Galaxy J4 and its USB cable will be required too as a connection between these devices will have to be ensured. Anyway, before doing anything else, do install your phone’s drivers on your computer – in that regard you can choose the right drivers by using the Samsung KIES toolkit.

On your Samsung Galaxy J4 make sure that USB Debugging is enabled – verify that from Menu - > Settings - > Developer Options. Note: gain Developer Options by tapping repeatedly on Built Number – after 7 or 10 repeated taps you should be prompted with the ‘you are a developer’ message.

It’s important to ensure enough power on your phone. If it remains without power a sudden shut down might happen while Odin is running. Well, in that case you can end up in soft-bricking your Samsung Galaxy J4 – you can experience severe malfunctions so be careful. Anyway, verify the power and just plug in the charger first if the battery icon shows less than 50% power left.

Manually install J400FPUU2ARK6 December 2018 Security Patch on Samsung Galaxy J4

  1. Power on your computer and download the update file that will be used below. You can download the December 2018 Security patch from this page. Save the J400FPUU2ARK6 firmware on desktop.
  2. Afterwards, download Odin. Save the file on your computer and then run the executable patch. Finally, just follow on-screen prompts and set up the flashing program on your PC.
  3. Run Odin when that’s done.
  4. Also, power off your Samsung Galaxy J4 and wait a few seconds while this process is being completed.
  5. Now, reboot download mode on your Android device: press and hold the Power, Volume Down and Home buttons together, for a few moments until download mode shows up.
  6. Connect your smartphone with your computer via USB cable.
  7. The connection should be properly ensured – Odin should show the ‘added’ message and its ID:COM section should be turned yellow or blue; if different, reinstall your phone’s drivers on your PC and retry the steps from above.
  8. On Odin click on AP and select the December 2018 Security Patch from desktop.
  9. When asked, verify that Re Partition and Auto Reboot options aren’t selected.
  10. Click on Start and wait while the J400FPUU2ARK6 Android update is being automatically installed.
  11. The ‘pass’ message will be displayed and the ID:COM field will turn green – then you can close Odin, remove the USB cable and reboot your Android based device.

Solutions for the problems that might occur during the update operation

Odin is a stable program, but it might cause problems occasionally. For example, it might get stuck right while you try to follow the steps explained above. If you are dealing with such problems don’t panic and follow: close the flashing program and end its processes – the best is to do that from Task Manager (press the Ctrl+Alt+Del keyboard hotkeys combination); also disconnect your phone from your computer; and reinstall your phone’s drivers on your PC; then force-restart your Samsung Galaxy J4 and repeat the update steps from above as everything should work without issues now.

The last reboot will bring the J400FPUU2ARK6 firmware on your Galaxy J4. But, in rare situations, instead of seeing the new update you might get stuck in a boot loop. Then, you will have to make a hard reset and clear app data cache first – do it by following: enter recovery mode on your Samsung branded device – press and hold, together and for a short while, the Power, Volume Up and Home buttons; in recovery choose ‘wipe data factory reset’ followed by ‘wipe cache partition’ and by ‘wipe dalvik cache’; when done, return to main menu of recovery and pick ‘reboot system now’.

That’s it. The guidelines explained above should help you manually set up the December 2018 Security patch on your Samsung Galaxy J4. Test the J400FPUU2ARK6 software and share your experience with us and with the other users who might plan to apply the same update on their own devices – you can quickly talk with us by filling out the comments field from below. Enjoy and stay close for similar other tutorials and Android related tips and tricks.

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