*** YOU NEED TO REGISTER ON THE FORUM BEFORE YOU CAN ACCESS THE DOWNLOAD LINK ***
INSTALLATION INSTRUCTIONS
http://www.xperiablog.net/2015/03/17/guide-to-installing-xperia-lollipop-using-xperifirm-and-flashtool/
- Open link above and skip to the section entitled “FlashTool steps”.
- As you have already downloaded the FTF firmware file, skip to the section where you need to “Flash device”.
XPERIA FIRMWARE DETAILS
This is official stock Sony Xperia firmware.
Model: Sony Xperia M Dual (C2004)
Firmware version: 15.5.A.1.5_R1C
Region: US (Generic) [1276-0081]
Android version: 4.3
Xperia M Dual_C2004_15.5.A.1.5_US_Generic 4.3
Sony Xperia M Dual (C2004) Android 4.3 firmware - Generic US