[Sony Xperia Z Ultra] blueether:
This is still a WIP as Devs do their good work :D

[EDIT]

Although a few people seem to have had issues, I'm removing this big RED warning as these instructions work well where it says tested, but still: Use this guide at your own risk!!!

[/EDIT]

Rooting guide for the new 14.2.A.1.136 firmware:

This will void your warranty, don't flash without a full battery or if there is a black cat near by. If this bricks your Z-Ultra I blame the Waikato Draught

Upgrading from .290 already rooted Unlocked BL

Working

Flash ftf and follow Coming from stock 14.2.A.1.136 with unlocked BL

Path 1. Coming from stock 14.2.A.1.136 with unlocked BL

Tested as working

This will give you Dual Recovery (CWM+TWRP)

Download [MENTION=631273]Chainfire[/MENTION]'s SuperSU http://download.chainfire.eu/supersu

Download [MENTION=2686480]jackie099[/MENTION]'s kernel and recovery: http://xdaforums.com/showthread.php?t=2631866

Copy SuperSU to SD card of phone

Flash [MENTION=2686480]jackie099[/MENTION]'s recovery kernel from flashtool (boot into fastboot mode)

Boot into recovery

Flash SuperSU update from recovery

Re-boot

Path 2. Coming from stock 14.2.A.1.136 with unlocked BL

Tested as working

This will give you these Recoveries (CWM & PhilZ Touch & TWRP)

Download [MENTION=3806218]ChillyChan[/MENTION]'s dual recovery kernel https://db.tt/MSIQ5ZNW (read about it here http://xdaforums.com/showthread.php?t=2575909)

Download XZDualRecovery kernel with recovery http://nut.xperia-files.com/downloa...kZHVhbHJlY292ZXJ5Mi43LjgwLUJFVEEuZmxhc2hhYmxl

Download [MENTION=631273]Chainfire[/MENTION]'s SuperSU http://download.chainfire.eu/supersu

Copy SuperSU and XZDualRecovery to SD card of phone

fastboot boot (hotboot from flashtool) [MENTION=3806218]ChillyChan[/MENTION]'s dual recovery kernel (we only want to boot this kernel/recovery, not flash it)

Flash XZDualRecovery from recovery

Flash SuperSU update from recovery

Re-boot

If you only have partial root then change /sys/kernel/security/sony_ric/enable (from '1' to '0')

Coming from stock 14.2.A.1.136 or 14.2.A.0.290 with locked BL

Get a rooted .290 install then continue from below "Upgrading from .290 already rooted Locked BL"

To get root on .290 follow below or [NUT]'s/jackie's stock .290 for locked BL

Flash [NUT]'s .532 http://xdaforums.com/devdb/project/dl/?id=3442 (read guide here http://xdaforums.com/showthread.php?t=2593918)

skip setup

settings

- enable dev settings

- enable usb debuging

Root with this tool: http://xdaforums.com/showthread.php?t=1886460

- Option 0

Run http://xdaforums.com/showthread.php?t=2426739 to get recovery

Download DoggRom for C6833

Download latest ZU-lockeddualrecovery2.7.xx-BETA.flashable.zip

Save both to SD card

Download .136 ftf for your Ultra - Save in flashtool firmware folder

Now comes the tricky bit

Charge phone - I used 40% of the battery while doing this

Reboot to recovery

Wipe Data

Flash a stock based rom (DoggRom for c6833 or [NUT]'s etc) from recovery - DON'T REBOOT

Flash ZU-lockeddualrecovery2.7.xx-BETA.flashable.zip from recovery

POWER OFF the phone - don't reboot

Start flashtool

Select flash

Select Flashmode

Select the .290 ftf or .136 ftf

[Top Box] Uncheck everything

To make sure that there are no mismatch issues like on the Z1 that has lead to DEAD devices

[Middle Box] Check excludes for system only. We may need at least all of these: KERNEL, ELABEL, BOOTBUNDLE, AND BASEBAND

Flash

Reboot phone when done

Run XZDualRecovery 2.7.xx from the pc to get recovery if needed

Upgrading from .290 already rooted Locked BL Should be working

The easiest way ATM is to use [NUT]'s 136 ROM ( testing stages):

http://xdaforums.com/showthread.php?t=2631768

Thankyou to these good folk.

With out your work all of this would be most difficult.

[MENTION=2686480]jackie099[/MENTION] and [MENTION=4904057][NUT][/MENTION] for the base of the rooting guide for .290 on locked BL

[MENTION=4677142]chemcup[/MENTION] for the FTF

[MENTION=3806218]ChillyChan[/MENTION] & [MENTION=4904057][NUT][/MENTION] & [MENTION=2686480]jackie099[/MENTION] for the recoveries and kernels

[MENTION=4742570]abuihsan[/MENTION] for the ric tip

many more as well...

Please feel free to add tips to this guide, and I'll keep it updated.