Update Sony Xperia Z2 D6502/D6503 To Official Android 5.0.2 Lollipop 23.1.A.0.726 Firmware

A new Android 5.0.2 Lollipop update carrying the build number 23.1.A.0.726 has started rolling out for Sony Xperia Z2 D6502 and D6503. It looks like Sony has started fixing the issues that emerged up in the previous (23.1.A.0.690) update for the Xperia Z2. Changes in this new firmware are same, e.g. Google’s new Material Design, Notification Cards on lock screen, user modes and guest mode etc. The only difference is, Sony has fixed a number of bugs and the missing “Close All” button has made its way to the recent apps menu of the phone. Since this update is hitting different regions now, users will be updating their device to get the best out of their device.

If you haven’t received this update in your region yet, it will take a while for Sony to pack it up and push towards you. If you can’t wait for the update to arrive through OTA or through Sony PC Companion, you would like to use a different method to update your device immediately and that’s what we are here for at the moment. We are going to flash the latest Android 5.0.2 Lollipop update with the build number 23.1.A.0.726 on our beloved Sony Xperia Z2 D6502 and D6503. We will be flashing the FTF file using Sony Flashtool. Let’s go through some quick early preps and flash the firmware now.

Early Preparations:

1. This is only for Sony Xperia Z2 D6502 & D6503

This ROM is only for the device mentioned above. Make sure that your model number matches the one listed above. To do so, go to Settings > About Device on your device and see your model number. Flashing this firmware on any other device will result in bricking it so make sure that you meet this requirement first of all.

2. Battery should be charged at least over 60%.

Make sure that your battery is charged enough to complete the flashing process. In case your battery is low and your device goes dead during the flashing process, you may end up soft bricking your device as it won’t complete the flashing process.

3. Backup everything!

Just to be on the safe side, you may consider backing up each and everything from your Android device. This is highly recommended so that in case anything goes wrong, you still have the access to all of your data and you can restore it immediately. You may backup everything as listed below.

  • Backup SMS Messages
  • Backup Call Logs
  • Backup Contacts
  • Backup Media – Copy your files manually to your PC or Laptop.
  • Titanium Backup – If already rooted, use Titanium Backup to backup all of your apps, system data and other important content. If you haven’t rooted your device previously, skip this step.
  • Backup Nandroid – If CWM  or TWRP installed previously, otherwise skip this step and perform this at the end of flashing.

4. Enable USB Debugging Mode on your device.

Enable USB debugging mode on your device. To do so, tap settings>developer options>USB debugging. If you can’t find developer options in settings, then tap settings > about device and tap “Build Number” for 7 times and you’ll get em’ activated under settings.

5. Install and setup Sony Flashtool.

You must have installed Sony Flashtool. Find the full guide here.

After installing Sony Flashtool, open the Flashtool folder from the drive where you installed it. Now open Flashtool>Drivers>Flashtool-drivers.exe and install the Flashtool, Fastboot & Xperia Z2 drivers from the list. [Important]

6. Use OEM data cable to establish connection.

Make sure that you use the phone’s original data cable to establish connection between your phone and the PC. Using a different data cable might result in interrupting the firmware installation.



How To Update Sony Xperia Z2 D6502/D6503 To Official Android 5.0.2 Lollipop 23.1.A.0.726  Firmware

Before moving forward, please make sure that you’ve read the pre requisites and ensure that you are set to go ahead.

  1. Download the latest firmware Android 5.0.2 Lollipop 23.1.A.0.726  FTF file.
    1. For Xperia Z2 D6502 [Generic/Unbranded] Link 1 | You can also create your own FTF using this guide.
    2. For Xperia Z2 D6503 [Generic/Unbranded] Link 1 [download and extract this one] | You can also create your own FTF using this guide.
  2. Copy the file and paste in Flashtool>Firmwares folder.
  3. Open Flashtool.exe now.
  4. Hit the small lightening button on the top left corner and select Flashmode.
  5. Select the FTF firmware file that you placed in the Firmware folder.
  6. From the right side, select what do you want to wipe. Data, cache and apps log, all wipes are recommended, perhaps you may select if you don’t want.
  7. Click on OK, and it will start preparing the firmware for flashing. This may take a little while to load.
  8. As soon as the firmware is loaded, it will prompt you to attach the phone by turning it off and keeping the back key press.
  9. For Xperia Z2 Volume Down key will do the job of back key, just turn off your phone, keep the Volume Down key pressed and plug in the data cable.
  10. As soon as the phone is detected in Flashmode, the firmware will start flashing, Do not leave the Volume Down key until the process is complete.
  11. As soon as you see “Flashing ended or Finished Flashing” leave the Volume Down key, plug the cable out and reboot.
  12. That’s All! Congrats! You’ve installed latest Android 5.0.2 Lollipop on your Xperia Z2. Enjoy


Please note that, this is an official firmware and it won’t brick your device and it won’t void the warranty of your device. This firmware is not pre-rooted, it is purely untouched and stock firmware.

In case you got any queries or face any problems regarding this guide, please feel free to stop by the comment box below and let us know. We will get back to you as soon as possible. Thanks all!

Next: Root Xperia Z2 D6502, D6503 23.1.A.0.726 5.0.2 Lollipop Firmware Plus Recovery

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