*** 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
Model: Sony Xperia M2 (D2306)
Firmware version: 18.3.1.C.1.15_R1B
Region: Latin America (Generic) [1286-8354]
Android version: 4.4.4

Xperia M2_D2306_18.3.1.C.1.15_Latin America _Generic 4.4.4
Sony Xperia M2 (D2306) Android 4.4.4 firmware - Generic Latin America