Update Xperia ZL to Android 4.4.4 KitKat Official Firmware 10.5.1.A.0.292

Sony Xperia ZL is a new flagship smartphone from the Sony’s factory, which comes with almost the same features as Sony Xperia Z but with notable improvements. It houses a big 5-inch full HD screen with a resolution of 1080 x 1920 pixels, 15. GHz Quad-Core Qualcomm processor, 2 GB RAM, Adreno 320 GPU, 13 MP primary camera, 4G LTE support, 16 GB inbuilt storage, which is expandable up to 64 GB using MicroSD card and runs on Android 4.1.2 Jelly Bean.

Sony has already claimed that the Xperia ZL will be officially upgraded to Android 4.4.4 KitKat and it will have some major improvements over the UI and system performance. Finally, the manufacturer has released the latest official firmware version 10.5.1.A.0.292 to update Xperia ZL to Android 4.4.4 KitKat. So, if you haven’t received the firmware 10.5.1.A.0.292 update notification yet, then here is the manual way to install Android 4.4.4 KitKat on Sony Xperia Zl C6503.

Update Xperia ZL to Android 4.4.4 KitKat Official Firmware 10.5.1.A.0.292

In this article, you find a step-by-step guide on How to update Xperia ZL to Android 4.4.4 KitKat Official Firmware 10.5.1.A.0.292. However, the procedure is quite long so please make sure that you don’t miss out any of the steps or you may brick your smartphone. So, let’s head over to the guide!

Note that this is an Official Update Stock ROM for Xperia ZL released by Sony and that’s the reason, you won’t lose your smartphone warranty.

Important Things to Check:

  • Charge your Sony Xperia ZL to 70 – 80%.
  • Enable “USB Debugging” option found under “Settings > Developer Settings”.
  • Make sure you have already unlocked your bootloader.
  • Take a backup of your important stuff.
  • Install “Sony Xperia ZL USB Drivers” on your system

Files to Download:

How to Update Xperia ZL to Android 4.4.4 KitKat Official Firmware

Step 1) You need to download both the above files on your Computer.

Step 2) Then install “Sony FlashTool” on your computer and copy “FTF Firmware file” to “C:\Flashtool\Firmware” folder.

Step 3) Launch the “FlashTool.exe”.

Sony Flash Tool Initialization

Step 4) On FlashTool, click on “Flash Button” then select “Flash mode” and click on “OK”.

Sony Flash Tool - Select Mode

Step 5) Select the firmware update file in the left panel, which you have downloaded and copied earlier into the “Firmware” folder.

Step 6) Now, in the right panel, please make sure that only “Data”, “Cache” and “AppsLog” check boxes are ticked. Don’t try to mess with other options.

Sony Flash Tool - Firmware Options

Step 7) Click on Flash button and you will ask to connect your smartphone to install Android 4.4.4 KitKat on  Xperia ZL.

Sony Flash Tool - Phone Detecting Mode

Step 8) Turn your smartphone off and connect it to your Computer with holding Volume Down button.

Step 9) As soon as the smartphone is detected by FlashTool, it will start updating it.

Flashing Started

Step 10) The flashing process will take 2 – 3 minutes. Once you see “Flashing Finished” message on the FlashTool, it means you smartphone is successfully updated.

Sony Flash Tool - Flash Completed

Step 11) That’s it! You can disconnect your smartphone from the Computer and reboot it!

As this is the first time you are starting your Sony Xperia ZL, so it will take some more time to boot-up than usual. Please have some patience.

Finally, the flagship Sony Xperia ZL C6503 is updated to latest Android 4.4.4 KitKat firmware. Well, if you have any problem in updating your smartphone then you can tell us via the comments box below. Enjoy! 😀