*** 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 M2 (D2306)
Firmware version: 18.6.A.0.182_R3C
Region: US (Generic) [1281-2418]
Android version: 5.1.1

Xperia M2_D2306_18.6.A.0.182_US_Generic 5.1.1
Sony Xperia M2 (D2306) Android 5.1.1 firmware - Generic US