[Sony Xperia Z Ultra] lesterine:
I have 6802 13W30. I'm going to step by step how i got	FU 14.1.B.1.510 at 3Am last night in texas.

First I did this http://xdaforums.com/showthread.php?t=2422521

But like so many people after I did it, I started experiencing the dreaded SOD even after unchecking OPTIMIZED BACKLIGHT in display.

So after the SOD. i shut the phone off by pressing and holding volume up + power. once phone was off, i opened the sim cover area and depressed the little soft reset button 3 times.

I then decided it was time to go back to .475 so i opened pc companion and followed these steps. (Keep in mind i had done a .475 repair 2 days before with pc companion because i was having touchscreen issues, wanted to see if a full firmware wipe and install would fix problem. So i knew .475 was already on my computer and this should take 5 minutes, but it didnt. Instead i noticed pc companion was taking for ever because it was redownloading something off the web)

Turn the phone off and disconnect it from the computer

1. Disregard any instructions to connect the phone until you complete step 9

2. In the welcome screen you will see the different modules available for you including the "support zone" option. Click on "Start" below it.

3. On the next page Click on "Start" under "Phone/Tablet Software update"

At this point if you get an error stating that "unable to install update components" or "server is bussy" Please proceed to step 12. If you not see that error then continue with step 4.

4. The program will show a window saying "Could not find phone/tablet". Click on the option below that reads: "Repair my phone/tablet" the program will issue you a warning on the content that you will lose during the update

5. Choose the option to continue.

6. The program will issue a final message warning you of possible data lost during the update. Click on the checkmark and then on "Next/Continue".

7. After that, the program will download the necessary information (5 to 6 minutes) and it will present you with a list of phones.

8. Choose the Phone from the list then click on "next" then you will see a new section telling you how to connect the phone. (don't connect it yet)

At this point the phone must be off and disconnected from the PC.

9. Connect the cable to the PC not to the phone, then wile pressing and holding the indicated button (in the steps on screen an specific button will be shown for you to press on the phone) connect the cable to the phone and keep holding the indicated button until the program says "the update of your phone has started..." (in some cases a message of "Installing drivers" will appear before the message of "the update of your phone has started..." is shown.)

10. If you failed to follow the steps correctly the phone will turn on and it will request that you "Proceed with the following steps, slide down the notification bar", If this happens disconnect the phone from the cable, turn it off and repeat from step 9).

11. If the phone is connected properly, PC Companion will proceed with the update ( It will tell you to let go of the back key) then wait for the update to finish and follow instructions on screen to disconnect the unit.

When every thing was finished. PC companion told me your phone has been updated to 14.1.B.1.510 and since 12 hours now, NO SOD AND RUNNING VERY SMOOTH.!