How to Update Sony Xperia Z2 (D6502,D6503) to Official Android Lollipop 5.0.2 23.1.A.0.690

As promised before, Sony has rolled out Android Lollipop to its Z line series.  The lollipop update includes visual changes and google’s material design. This article is a step by step guide on how to update Sony Xperia Z2 (D6502, D6503) to Android Lollipop.


1. These ROMs are intended ONLY for Xperia Z2 variants with model number of D6502 & D6503.  To find the model number of your phone, go to Settings > About Device > Model Number.

2. Make sure your phone’s battery is over 50%.

3. Enable “Unknown Sources” at Settings > Security > Unknown sources.

4. Go to Settings > About Device > Build Number then tap on “Build Number” 7 times until you see “you’re now developer’ message”.

5. Go to Settings > Developer Option > USB Debugging and enable it.

6 Backup your contacts.

([Ultimate Guide] How To Backup and Restore Contacts on Android)

7. Backup your apps.

([GUIDE] How to Backup & Restore Android Apps + Data (Root Required) 

([GUIDE] How to Backup & Restore Android Apps + Data (No Root Required)

8. Backup your messages.

([Guide] How To Backup and Restore SMS on Android [No Root Required])

9. Move your photos, videos, and other personals to PC.


Download the ROM Corresponding to the MODEL NUMBER of your phone. Be very careful not to download the wrong rom, as flashing it will brick your device and we will not be responsible for any damages that may occur on your device

1. Flashtool

2. Sony Driver Pack

3. ROMs


D6502: D6502_23.1.A.0.726_D6502_Customized_IN.ftf

D6503: D6503_23.1.A.0.726_R7C_Customized HK.ftf

D6503: D6503_23.1.A.0.726_HK.ftf



1. Install flashtool and make sure the installation directory is in C drive.

Flashtool 1

2. After installation the “Flashtool” folder will be created in the root of C drive.

flashtool 2



The “Flashtool” folder contains bunch of folders and files.

Sony Flashtool 3

– Drivers: this folder contains the drivers for your phone.

– firmwares: this folder contains a file named ‘X10_V1_BLRelock.ftf‘.

Sony Flashtool 9

– Flashtool.exe, Flashtool64.exe: this is the flashtool program that we’ll use for the update process.  Flashtool.exe is for 32-bit, and Flashtool64.exe is for 64-bit.


3. Open drivers folder and double-click on “Flashtool-drivers.exe”.

flashtool 4

4. The following window will show up:

Sony Flashtool 5

5. Make sure to check both “Flashmode Drivers” and “Fastboot Drivers” plus your phone’s driver (which is Z2 in this case) then click on install and wait for the installation process to finish up.

Sony Flashtool 6

Sony Flashtool 7

Important Note:

If for some reasons your phone’s driver was not successfully installed, try to install the “Sony Driver Pack” that you downloaded above.

6. Open Flashtool.exe (32-bit) or Flashtool (64-bit).

7. The following screen will show up giving us the below message “Please move C:\Flashtool\firmware content (X10_V1_BLRelock.ftf) to C:\User\YourPCName\.Flashtool\firmwares”.

sony flashtool 8

8. Simply move both the contents inside C:\Flashtool\firmwares and the downloaded firmware to the mentioned locations.  In another words, we should move “X10_V1_BLRelock.ftf”(which is inside Firmwares folder) and the downloaded firmware to this location : C:\User\YourPCName\.flashTool\firmwares.

Sony Flashtool 10

9. After you move both firmware files inside the mentioned location, wait for the flashtool to finish syncing process.

Sony Flashtool 11

Sony Flashtool 12

10. Click on the black flash button.

Sony Flashtool 13

11. The below screen will show up, choose “Flashmode”.

Sony Flashtool 14

12. Then the below screen will show up.

Sony Flashtool 15

13. Choose your firmware file (which May be either D6502 or D6503in this case)

14. Leave the Wipe options as is.

Sony Flashtool 16

15. When you’re ready, click on “Flash” button.

Sony Flashtool 17

16. The flashtool will prepare the firmware for flashing.

Sony Flashtool 18

17. After that, the below screen will show up.  Turn off the phon then hold down the Volume Down button and connect the phone to your PC via original cable.

Sony Flashtool 19

18. While connecting your phone, a green and red LED lights will blink.   This means your phone is successfully connected in flashmode.  You should also see “Device connected in flash mode” message as well.

Sony Flashtool 20

19. Once your device is successfully connected in flash mode, the flashing process will start automatically.

Sony Flashtool 21

Sony Flashtool 23

20. Once the the flashing process is finished, you should see “Flashing Finished” message.

Sony Flashtool 24

21. Turn on your phone and wait for 4-5 minutes, you phone should have rebooted successfully!

Congratulations! your phone now runs Official Android Lollipop 5.0.2!

Sony Xperia Z2 Android Lollipop 5.0.2

Sony Xperia Z2 Android Lollipop 5.0.2 2 Sony Xperia Z2 Android Lollipop 5.0.2 3

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Rawand Haidar

Rawand is Petroleum Engineer.He is Super high on Android. Rawand has been blogging since 2011, written more than 150 articles including tutorials, news, reviews about Android. He is interested in all things Android. Follow Me on Twitter