Sony Xperia Z Ultra SGP412 Android 4.3 Official Firmware Flash Files
Readme Once: Take a Backup: If you are going to flash the above Firmware on your Sony device, then take a backup of important data such as Contacts, Call logs, SMS, and other data as because your personal data will be deleted after flashing the stock firmware.
The firmware shared on this page is officially released by the company and helps you to recover your Phone if you ever got bootloop, software error, update error, hanging, Unknown Baseband, IMEI Null and dead issue.
How To Unbrick/Update Sony Firmware With Flash Tool:-
Step 1. Download Flashtool-0.9.11.0-windows.exe
Step 2. And the drivers The drivers are located usually C: / FlashTool / Drivers After installing Flash Tools.
Step 3. Open Flash tools and click the distance as described in the image below.
Step 4. In the next window, click “Flashmode” and then “OK” as in the image below.
Step 5. In the next window, select the Rom and “OK” as in the image below.