[Q] updating to LP on unlocked bootloader - Xperia Z2 Q&A, Help & Troubleshooting

With all the hype on the lp launch, I just realized I have no idea what to do : I got the rom through xpirifirm, and I'm just sitting there like "now what?"
Originally when I got the phone, I created a KK pre-rooted rom and used that on my phone, later on down the line I unlocked the boot loader to use a custom kernel and try different roms, but the pre-rooted rom how-to says it's for "locked" bootloader only, for now I figure I should be fine making the rom following the same process and then flashing the resulting zip to my phone, but I have a few questions :
is this the proper way to do it on UB ? to create a prerooted rom and use the zip file to flash the LP update ?
will I keep my root if I do this ? (I'll use the latest SU binary)
will I have recovery ? (I'll use the latest dual recovery)

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[Q] Recovery for Custom ROMs

Hey guys,
I recently flashed my Z2 yesterday with the PAC-Man ROM and now want to try flashing other ROMs, but realised that my TWRP has disappeared!
Prior to flashing, I was on stock and used XZDR to flash the ROM, but i didn't flash the "Z2-lockeddualrecovery[VERSION]-BETA.flashable.zip" as I'm on an unlocked BL + custom kernel, which XZDR doesn't support.
I've tried two different methods to getting TWRP installed into my phone, one via fastboot flash recovery and the other via Terminal Emulator, and although the cmd/TE shows the commands and scripts running and all, the recovery does not seem to get installed.
So my question now is how do I get any form of recovery installed into my Z2 (so i can flash a ROM!). I know I can use flashtool to reflash stock firmware and go through the entire procedure again to get recovery and subsequently other ROMs installed, but that doesn't seem to be a sustainable long-term solution!
Thanks in advance guys
Non stock custom roms come with a custom recovery %90 of the time
Press volume up when the orange or purple led turns on when the sony logo shows

[Q] General questions before going from stock to custom

So, never had a Sony-Device, the guides and instructions here are a bit unclear to me.
As far as i understood before going custom:
Downgrade to .532 with flashtool -> run BackupTA -> upgrade to latest again (rly neccessary?) -> then unlock Bootloader
Pretty straight forward up until here.
From there on i can use [NUTS]s XZDualRecovery if i want to stay on stock-kernel and flash custom roms frem there without any problem as far as i understood.
Is this correct?
But what if i want to use a custom kernel at some point?
DooMKernel for example is flahsed via Fastboot, but only compatible with Stock-Sony-Roms
PimpedKernel for example on the other hand is CM-based only and only uses a recovery flashable zip
I'm a little bit confused because of that.
Is a Kernel and / or recovery included in every ROM? (Edit: Yep Kernel is..)
Can i just use [NUTS] recovery and then flash any ROM / Kernel trough it? And afterwards a custom Kernel if the one included in ROM (if any?) lacks any features i want?
competent devs who maintain roms for this phone would include a recovery in their package
slimrom does this and i don't have to worry about losing trwp recovery
alia5 said:
So, never had a Sony-Device, the guides and instructions here are a bit unclear to me.
As far as i understood before going custom:
Downgrade to .532 with flashtool -> run BackupTA -> upgrade to latest again (rly neccessary?) -> then unlock Bootloader
Pretty straight forward up until here.
From there on i can use [NUTS]s XZDualRecovery if i want to stay on stock-kernel and flash custom roms frem there without any problem as far as i understood.
Is this correct?
But what if i want to use a custom kernel at some point?
DooMKernel for example is flahsed via Fastboot, but only compatible with Stock-Sony-Roms
PimpedKernel for example on the other hand is CM-based only and only uses a recovery flashable zip
I'm a little bit confused because of that.
Is a Kernel and / or recovery included in every ROM? (Edit: Yep Kernel is..)
Can i just use [NUTS] recovery and then flash any ROM / Kernel trough it? And afterwards a custom Kernel if the one included in ROM (if any?) lacks any features i want?
Click to expand...
Click to collapse
The downgrading is no longer necessary, use the easyroot tool. Or use the dualrecovery installer for locked bootloaders then flash superuser zip from recovery. Once you have it rooted then back up TA and unlock bootloader. You should be able to flash boot.img from flashtool, if you wanted to download a rom and pull it from zip. I mention that because most roms only have one recovery, so if you flash the img from the rom you want to install first with flashtool you could make a backup that could be restored with new recovery. One other thing that I learned the hard way is a backup made before unlocking bootloader will relock it if restored.
No downgrading, just root and back up TA, great
So i need to flash boot.img from the ROM every time i want to install a new ROM? Or just the first time going from stock to custom? Or just if i have twrp n current rom and the rom i wanna flash is only compatible with CWM?
alia5 said:
No downgrading, just root and back up TA, great
So i need to flash boot.img from the ROM every time i want to install a new ROM? Or just the first time going from stock to custom? Or just if i have twrp n current rom and the rom i wanna flash is only compatible with CWM?
Click to expand...
Click to collapse
Here is a brand spanking new guide to check out that is up to date.
http://forum.xda-developers.com/xperia-z-ultra/general/guide-everything-root-4-4-4-t2938098
I will try to put forth an example to try and demonstrate what I trying to convey in regards to flashing boot.img.
Example.... You are on a rom that contains CWM and you are going to flash a rom that contains TWRP and you wish to have a backup of first rom that could be restored you would flash the img. with TWRP then make backup. Another option would be to just go ahead and use CWM to make backup but you would need to flash that img. in order to be able to restore. I think most roms can be flashed from either recovery at the moment, the concern is your backup being compatible with whichever one is in your current rom.
So, in the boot.img is Kernel+Recovery, alright, and i only need to worry about flashing boot.img für backup reasons.
Pretty much answers what i was wondering, thanks guys

[Q] Ways to get new bootloader

As some of You may know, Sony gives as opportunity to use /recovery partition.
My question is if I still need to use EMMA or some update (.270, .283 for Tmo) has this bootloader built in?
I ask, coz I read (maybe its just gossip) the M2 with 18.3.1.C.1.17 got new bootloader (ofc it still needs unlocked bootloader to flash recovery).
Additionally i would like to ask someone who use it, how to flash recovery to this partition.
And what when i flash stock rom. Is it overwritten? Or recovery is always there?
I think recovery isn't flashed unless you flash it, because even flashtool doesn't do it.
Recovery can be flashed through fastboot using "flash recovery xyz.img", where xyz.img is your recovery but you have to compile one yourself as I haven't seen any already compiled.
Sadly, none update has integrated this bootloader update so far, maybe sony will surprise us with the 5.1.1 update and include it so yes, you have to use Emma.
EDIT: You can download AOSP package from freexperia, they have build an AOSP recovery that you can boot into with the new bootloader but the menu is missing, however I can be wrong because I have tried it a month ago, maybe some changes were made

Root and recovery on Lollipop

Managed to get my hands on a cheap second hand TabZ in good condition. And although Sony's Lollipop firmware looks and feels nice I really want to go the custom Rom road as it allows me to tinker more with it.
Now is when the situation gets complicated as it seems there is a plethora of versions, some more complicated then others, to root the device and install a recovery on it. My questions to you, anybody willing to clear these things out, are:
1. Does the bootloader need to be unlocked in order to obtain root for a tablet already running Lollipop? (I read in one thread that starting with Lollipop this might not be required anymore)
2. What is the best way of getting root?
3. How do you install recovery? I understand the XZDualRecovery to be really popular but some of the instructions can be mind boggling (the use of Kernel Builder to repack the kernel in order to replace the built in recovery with XZDualRecovery). Is this the same as flashing a recovery every time I install a new ROM before rebooting if I want to still have one (basically there is no permanent one, but changes with the rom you are flashing?! )
Any help would be much appreciated as I am stuck as I have never been with rooting and installing recovery on a device. Thanks!
1&2. Bootloader is not directly connected with Root. Unlocked bootloader allows you to install custom ROMs like FXP, cDroid, CyanogenMod and others.
For rooting stock Sony Rom rooting doesn't usually need bootloader unlock.
For example for 4.4.4 and 5.0.2 firmwares KingRoot will help you to root device. For other firmware, other tools exist.
3. For installing Custom Roms like FXP, CyanogenMod and others you need unlocked bootloader.
XZDualRecovery is mainly used for stock Sony Rom and based on stock roms.
For custom roms you can flash TWRP recovery to FOTA partition which will be permanent and will allow you to install any custom rom.
Also before bootloader unlock, get root and Backup TA partition of your device.

Rooting Orange Z2 with locked bootloader

Hello, I recently bought an xperia Z2 from someone that had it from the french operator Orange.
Running on a heavily bloated lollipop 5.0.2 with a build number of 23.1.A.1.28 D6503 with a locked unlockable bootloader
Being a samsung user all my life, this seems a new territory to me, I first wanted to clean everything up and have it running on CM12, that seems impossible because of the bootloader lock.
Then I failed rooting it and got really confused. the device also doesnt boot into recovery AT ALL
Can you please help me root the hell out of it and clean all the crap that Orange put in it? and also would you please suggest a debloated clean stock rom(kitkat is preferred)
Thank you so much for your time, I'm looking forward for you replies
Use KingRoot for rooting,install BusyBox, then install custom dual recovery with XZRecovery finally flash SuperSU zip with recovery , here's a link for all the files needed http://www.mediafire.com/download/894tuibsb2a75bm/wts.zip
Well, my dear friend, I failed twice doing that, now im running a clean factory reset and going to try again, will let you know
Flash android version 4.4.2, root this version and then flash the firmware of your choice via recovery (make sure it is a prerooted one, that comes in a Flashable Zip form)
As I know, Sony devices doesn't have accessible stock recovery
You can boot into recovery only after installing custom recovery like :
TWRP - CWM - Philiz Touch
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