Sony released the Android Lollipop for Xperia Z2 a while ago. However, it seems like the version that was released was marred with some technical issues. Yesterday, Sony started out rolling an update on the same Android version but with a build number “23.1.A.0.726”. We got our hands on the ftf file and prepared a small, effective guide on how to update your Sony Xperia Z2 D6502/D6503 to Android 5.0.2 Lollipop.

Note: The guide is for both the 3G (D6502) and 4G LTE (D6503) variant. Make sure you flash the correct files.

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Prerequisites

  • Make sure your battery is charged to at least 70 percent.
  • The ADB drivers must be set up. Here’s how to.
  • Turn on the USB debugging by going to Settings > About Phone > Tapping the ‘Build number’ at least 7-8 times and going back into settings and then going to Developer Options.
  • Backup your apps and important messages.
  • Download and install flashtool from here.
  • Download the FTF from here; Sony Xperia Z2 D6502, Sony Xperia Z2 D6503.

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

  1. Once the files are downloaded, copy them to flashtool/firmwares folder.
  2. Fire up the flashtool and wait for it to load.
  3. Once the flashtool is up and running, click on the small lightning bolt on the top left and choose Flashmode.
  4. Select the firmware file you placed in the firmwares folder.
  5. Make sure all boxes are unticked apart from Wipe Data/Cache/App logs.
  6. Once you are done making the selection, click the ok button and wait while the update gets prepared.
  7. Turn off your phone and wait for the message that asks you to attach your phone.
  8. Press and hold the volume down key and attach the USB cable to your phone.
  9. As soon as the firmware starts flashing, leave the volume down key and wait for the phone to flash the firmware. Do not disconnect the phone at any cost.
  10. Once the firmware is flashed, you will get a message asking you to reboot your phone.
  11. Reboot your phone and wait for 10 minutes for the first boot.

Once the phone boots up, you will know that you have successfully updated your Xperia Z2 D6502/D6503 to Android 5.0.2 Lollipop.

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