How to Install Flashtool

1. You can download it, here

Note, if you're using Windows 8, you need to follow these step first

2. After that, double click the program. You'll see the pop up window, like this

3. Click "Next" button. You'll see like this.

4. You can change the destination folder. Then click "Next".

5. Then, wait until the installation is finished

6. You need to go to the destination folder of Flashtool, that you have extracted. 

7. Then double click the flashtool folder. Then go to "drivers" folder

8. You'll see like this

Double click on it.

9. You'll see the pop out window like this

 Then click "Next"

10. Thick the "Fastboot Drivers" and Flashmode Drivers". Like this. Then click "Install"

11. Then a couple seconds, you'll see like this. Just click "Next"

12. Wait untill it Finished. If you see the pop out window, that has a red banner. Just click the second option.

13. Done ! You're Flashtool is installed :)

================================================================================================================================================

If you find any difficulties, you can post a comment

Flashtool

Flashtool is a S1 flashing software that works for all Sony phones from X10 to Xperia Z Ultra. They all use the S1 protocol for flashing firmwares (.ftf).

Flashtool can also easily unlock the bootloader of the phone using the BLU icon as far as the bootloader of your phone is unlockable

The flashing feature as well as bootloader unlock feature are available whatever the phone is recognized or not by the application. What is only mandatory for flashing is to own the FTF file according to the device you want to flash it on.

Why should I use flashtool ?

1. Once bootloader unlocked, official sony tools do not work anymore.
2. Using official sony tools, you can only upgrade. No downgrade possible.
3. Using flashtool, you can choose what to flash and what not to flash. This said, many rooting scenarios are available implying kernel only downgrade to retrieve a patched rooting exploit and then flash back the right kernel.

Many other features have been built-in so that Flashtool can also be used to (as far as the phone is recognized by Flashtool) :

1. Root your phone
2. Install recovery, busybox, custom kernels
3. Rebrand your device

OK.. If you want to download the Flashtool, you can download it here