*** YOU NEED TO REGISTER ON THE FORUM BEFORE YOU CAN ACCESS THE DOWNLOAD LINK ***
Once you have registered you will be able to download the firmware by clicking on the orange "DOWNLOAD NOW" button.
Once you open the link, you will need the decryption key to access the firmware - hit the 'spoiler' below to show the key.
!vkMRh8sjhVwlKpPFN2XQBU2-shKGWUSEcZLPn3jjKJk
INSTALLATION INSTRUCTIONS
http://www.xperiablog.net/2016/03/12/install-xperia-marshmallow-using-flashtool-and-xperifirm-guide/
- Download the FTF firmware file
- Ensure all drivers are correctly installed on your computer as highlighted in Part 1 of the guide linked to above
- Follow Part 3 of the guide to flash the firmware to your Sony Xperia device
XPERIA FIRMWARE DETAILS
This is official stock Sony Xperia firmware.
Model: Sony Xperia XA Ultra Dual (F3212)
Firmware version: 36.0.B.2.146_R6A
Region: Middle East and Africa (Generic) [1302-4436]
Android version: 6.0

Xperia XA Ultra Dual_F3212_36.0.B.2.146_Middle East and Africa_Generic 6.0
Sony Xperia XA Ultra Dual (F3212) Android 6.0 firmware - Generic Middle East and Africa