How to Unbrick/Flash or Upgrade Sony Xperia Android Devices

Note!

Your Device battery should be at least 35% before you perform this process

All described operations you are doing at your own risk.

STEPS >>

> Download Sony Flash Tool here

> Download Sony Xperia Stock ROMs from here

> Make sure you download the exact ROM for your device

> After download, extract the .zip or .rar file to get a .ftf file (flash file)

> Now move the .ftf file to C:/flashtools/Firmwares folder (click here for better explanations) 

> If you are using the latest version of Flashtools, you will need to put the firmware in C:\Users\ Your PC Username\.flashtool folder

NB: You can always change that firmware folder. Click on File and select Change user home then choose a folder. 

• Extract & Launch Flastool
• Click on the Flash image button
• Select Flashmode & Click Ok
• On the next window, select the ROM of the device you want to flash
  (After downloading and moving the ROM to C:/flashtools/Firmwares)

e.g
LT18i 4.1.B.0.587 (1254-2716)

 Wipe: Tick APPSLOG
           Tick CACHE
           Tick DATA

• Click Flash
• Connect device > Holding device return button > Insert USB Cable
• Once device is connected patiently wait for the process to complete
• Once the process has been completed, disconnect device & Power on.

Follow the Screenshot or read the tutorials above

WARNING!
Flashing will erase all of your data
All described operations you are doing at your own risk.