How to Make Flashable FTF Files from Sony Update Service Files for Xperia ROMs

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If you are a Sony Xperia device user, then probably you may aware of the FTF file format. If you are noobie to that user, and you did not know what that means; then know that from below. It is flashable ROM file format that can be used to install android from your computer using Flashtool.

If you want to update your Xperia device, then you need to do the same with the help of Sony Update Services (SUS). For that you need to download multiple files in different format. It will takes some time and you should have patient for that.


Actually, it won’t affect the normal users but it affects the person who are very much interested in getting the latest OS update on their device. If you are a such kind of person then you are advised to have FTF file format in your device.

It allows you to keep the firmware file readily available for flashing whenever you want without having to use SUS (Sony Update Service) to download it again. It also allows you to share the latest firmware files to your friends.

Further, you can also convert the FTF files into the flashable zip files for quick ROM installation via recovery. That’s why converting these files into a flashable FTF files can come in handy.

So far, these methods have been available only for 2011 Sony Ericson Xperia series devices, but none have been available for the newer Sony Xperia series devices. But don’t worry we have given the instructions at below to create a flashable FTF file for any official Sony ROM.

Full credits will goes to the XDA forum member deadmask who wrote this guide actually.

DISCLAIMER : Best Android Blog would not held responsible/liable for any damages takes to your device by following this procedure. So, do everything at your own risk.


1. First download the Sony Update Service from here.

2. Then Flash the phone with the latest software available using SUS.

(NOTE: You will need this step to get the temporary files required to create the ftf)

3. After that go to:

C:\Program Files (x86)\Sony Mobile\Update Service\db\13740270\blob_fs

********[ Replace ‘Program Files (x86)’ with ‘Program Files’ in case of a 32 bit computer]********

4) Create a folder “Source_files” in C:\

5) You’ll find 3 larger files with filenames like “file_#########”. One large file (~400MB) and 2 smaller files (~14MB and ~64KB). Copy those 3
files to “C:\Source_files”

********[Ignore the files with filename like “ICON_#####….”]********

6. Then download and install the latest flashtool from here.

7. Run Flash tool.

8. Click Advanced > Decrypt files.

9. Select Source folder: “C:\Source_files”

10. From Files, select all (Click & Ctrl + A) and click -> to move the 3 files to “Files to convert”.

11. Then Click OK.

12. Wait till it finishes

13. From Folder list, select all (Click & Ctrl + A) and click -> to move all files to Firmware content.

14. If it is ICS, tick the disable final verification check

15. On device wrote the model [ex. Xperia U (ST25i)], on Version write the firmware version (Ex. 6.1.1.B.1.10) , on Branding write the local
(Ex.Indian or Italian etc.)

16. Click OK

17. Wait till the process finishes.

********[You’ll get “Finished bundle creation” message on the log]********

18. When it finishes the .ftf file can be found on “C:\Flashtool\firmwares”

If you used PC Companion to update your phone then you need to go C:\ProgramData\Sony Ericsson\Update Engine\db\13740270\blob_fs IN STEP 3 And then follow the rest of the guide from STEP 4

About Sarvesh Darak

Sarvesh Darak is a blogger, an online marketer, a social media specialist and an Android Lover. At Best Android Blog, he writes Android news & tutorials for Android Rooting. He is the tech head and ensures that the blog keeps running at good pace. He also looks after all the SEO and promotion work. He’s from Surat, India and keep contributing regularly at the blog.

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