[Q] General understanding of flashing/unlocking - Xperia Z3 Compact Q&A, Help & Troubleshooting

Hello everyone,
after my last smartphone died, a Razr I (flashed with CM11), I am a bit confused about the situation with my new phone, the z3c.
I hate the Stock ROM and would love to get my hands on the new CM12 (or similar).
But I read that flashing/unlocking destroys the DRMs and makes the camera worse (among others).
Is there a way to get a Custom ROM without that drawback?
With my current Version 23.0.A.2.98 there is not even a exploit to root the system and make a complete backup (with DRMs), if i recall correctly. Or am I wrong?
Should I wait for a exploit in Sonys Lollipop ROM (if there will be any) or do i lose the Sony-DRMs nevertheless by flashing a Custom ROM?
Thanks and sorry if the questions are a bit confused, I am fairly new to all of this!

You're a little late to the party, aren't you?! Please, use the search function and it takes you to root, backup of your TA partition and everything else...

now you can root your z3c without unlock the bootloader,just try it
Sent from my D5833 using XDA Free mobile app

Related

Need some help regarding Custom-ROMs and their consequences!

Hello, iam a Xperia-Z (C6603) User for a week or two and am now looking forward to a
Nice and clean custom-Rom without any bloatware which I hate(ultimate music Sony select,sonysocialfoo and Facebook and alike)
and I guess cm11nightly would fulfill my needs, as i would also really love a smartphone without gapps.
FIrst I thought it would basically be a decision between the to be flashed ROM but now
I read about the bravia-engine getting lost forever which would really suck, is this still
State-of-the-art? Or is there an Option to get it back, as far as I know the BE is basically still there but licensed over a key like the mpeg2-codec on the raspberry-Pi isn't there a possibility to back it up and still be able to use it when you revert back to stock for example?
You're in charge now, what do you suggest me? Iam still on 4.2.2 and would like to get everything up-to-date soon. Btw. I would want a Rom that is of the same color as stock 4.2.2 so basically black, a white theme would be hard to look at in dark conditions even when turned down to lowest brightness.
So to sum it up: NO bloatware (must), NO gapps(nicetohave), black theme like 4.2.2(must), still BEngine(nicetohave)
Btw. How's the image-quality with custom-Roms? It shouldn't get worse than it is in 4.2.2 stock if possible!
Thanks! :good::highfive:
luluchambler said:
Hello, iam a Xperia-Z (C6603) User for a week or two and am now looking forward to a
Nice and clean custom-Rom without any bloatware which I hate(ultimate music Sony select,sonysocialfoo and Facebook and alike)
and I guess cm11nightly would fulfill my needs, as i would also really love a smartphone without gapps.
FIrst I thought it would basically be a decision between the to be flashed ROM but now
I read about the bravia-engine getting lost forever which would really suck, is this still
State-of-the-art? Or is there an Option to get it back, as far as I know the BE is basically still there but licensed over a key like the mpeg2-codec on the raspberry-Pi isn't there a possibility to back it up and still be able to use it when you revert back to stock for example?
You're in charge now, what do you suggest me? Iam still on 4.2.2 and would like to get everything up-to-date soon. Btw. I would want a Rom that is of the same color as stock 4.2.2 so basically black, a white theme would be hard to look at in dark conditions even when turned down to lowest brightness.
So to sum it up: NO bloatware (must), NO gapps(nicetohave), black theme like 4.2.2(must), still BEngine(nicetohave)
Btw. How's the image-quality with custom-Roms? It shouldn't get worse than it is in 4.2.2 stock if possible!
Thanks! :good::highfive:
Click to expand...
Click to collapse
I would recommend Cyanogen Mod to most people. Honestly I can't live without the features these days!
Regarding the consequences.. Well there aren't really any.. Kinda.. You may or may not lose your warranty based on how stingy Sony are feeling at the time. Most of the BRICK warnings are just to cover developers if someone does something wrong or if your phone just so happens to die of something completely unrelated while installing the rom.
I would recommend trawling this forum for at least and hour or two just reading the various guides; How to backup your phone, How to unlock the bootloader and, most importantly, how to backup your TA partition.
It's quite a pain free process. It's just better to be aware of what could go wrong, so you are prepared and can easily apply the fix before panicking and messing something up
Good luck and happy trawling!
You only have to learn these things once. Once your rooted, unlocked and running a custom rom updating is easier than sonys
Hi, thank you for your reply.
I just looked up what exactly the "TA-Partition" is and i guess the only thing that was worrying me (loosing Bravia) is not up-to-date anymore
So lets get started, i looked up what i need to backup the "TA-Partition" and if i understood everything its basically having a rooted Xperia-Z and a double-click on a .bat-file?
So i guess the best would to not upgrade any of the shown OTA-Updates by Sony, and root the 4.2.2-Stock ROM that is on the device right now?
As far as i know rooting 4.2.2 isn't really a problem right now, agreed?
So after sucessfully rooting the Sony Xperia-Z its just backing up the "TA-Par tition" with "TA-Backup"-Script?
After that, its unlocking the Boot-loader over the Sony-Website (IMEI, Name, Email....) so that they send you the Unlock-Code, after that you'll have to use fastboot to finally unlock it?
(If i check the Service Menu "Rooting Status": there is nothing behind it, but the bootloader-unlock allowed: says yes, so no problem right?)
After that you most likely are done for the moment, until you decide if it should be CM10.1Stable or CM11Nightly, rig
How's the status of CM11 right now, any known major bugs?
Thank you already for your help :good:
luluchambler said:
Hi, thank you for your reply.
I just looked up what exactly the "TA-Partition" is and i guess the only thing that was worrying me (loosing Bravia) is not up-to-date anymore
So lets get started, i looked up what i need to backup the "TA-Partition" and if i understood everything its basically having a rooted Xperia-Z and a double-click on a .bat-file?
So i guess the best would to not upgrade any of the shown OTA-Updates by Sony, and root the 4.2.2-Stock ROM that is on the device right now?
As far as i know rooting 4.2.2 isn't really a problem right now, agreed?
So after sucessfully rooting the Sony Xperia-Z its just backing up the "TA-Par tition" with "TA-Backup"-Script?
After that, its unlocking the Boot-loader over the Sony-Website (IMEI, Name, Email....) so that they send you the Unlock-Code, after that you'll have to use fastboot to finally unlock it?
(If i check the Service Menu "Rooting Status": there is nothing behind it, but the bootloader-unlock allowed: says yes, so no problem right?)
After that you most likely are done for the moment, until you decide if it should be CM10.1Stable or CM11Nightly, rig
How's the status of CM11 right now, any known major bugs?
Thank you already for your help :good:
Click to expand...
Click to collapse
I've been using Cyanogenmod 11 nighties for months now, no obvious bugs
Some features aren't implemented yet and the occasional feature is broken.. Nothing really integral to the phone though
You've pretty much got the method down! Just ensure you use a root method for your sony firmware version (Android version). It should use some form of "Exploit" to avoid deleting the TA-Partition. Honestly I backed mine up and haven't ever wanted to restore it, the features are more of a gimmick than anything useful
Enjoy
A few more questions! (Iam sorry )
So as far as i can see, my smartphone is running "10.3.1.A.0.244" which is regarding to the post by DooMLord not exploitable.
I therefore have to flash the "10.3.A.0.423"-Kernel-Only so that the previously used exploit works again.
After that i'll have to restore the Kernel that was previously on the Smartphone therefore "10.3.1.A.0.244"
After that root should stay in intact, but what about the TA-Partion? Is it somehow affected by this?
Secound Question, is it crucial to have an micro-sdhc inserted to sucessfully flash CM11 onto the Xperia Z after backing up TA, or is it possible without?
And the Image-Quality (taking Pictures) should be kinda worse on CM11 than it is with Sony's Stock Firmware, is it possible to include(myself) the propritary firmware.blobs for the Camera as we do it with gapps, or will i have to live with the reduced image Quality?
Thanks!

[Q] To unlock bootloader or not?

So I'm currently on 205 Deodexed by Dipesh and I'm using the locked bootloader version. Things are working okay, but occasionally I get a 'screen dimming lock up' sometimes and poor chrome performance. Also, the recoveries are feeling a bit glitchy. I could just stick with it or try a new fresh install.
I'm not sure whether to unlock my bootloader and try a 4.4 ROM or another stock based one. The reason why I haven't unlocked already is because I'm worried about keeping my warranty on the phone, I've only had the phone for a few months really and I don't want it to be unlocked if I need to get it warranty repaired.
I could wait for a next update which probably won't be KitKat but it would be nice. Don't really know what future updates we will get.
I just want my phone to work properly without any issues / as stable as it can possibly be. I dont really use xposed, just root and titanium backup and a few other root apps.I also wanna keep the Sony features like the LED notifications/ U-disco, and Bravia engine.
What would you guys recommend I do?
Sent from my nexus 7 using XDA Premium 4 mobile app
Stay locked and try CM11 or nexusPA LB kitkat roms.
You can unlock and keep warranty you just need to make sure you back up your TA partition, see the various guides on this. Unlocking would give you access to alternative Kernels like Williams with recoveries built in which is handy but these ROM's are fine without this.
I'd recommend you backup TA, make sure you have got it right (there is no way to restore TA without a backup, once you unlock it is lost forever; there is, however, a way to get Bravia Engine without TA, but it's better not to risk it), and unlock and try other kernels and ROMs until you find one that suits you best.
I have found CM11 to perform no better than stock .205.
I also feel that Firefox performs much better than Chrome (at the expense of a slightly higher RAM usage), in a few different devices, so you might want to try it out before flashing a new ROM.

[Q] How to backup stock ROM and transfer files?

I bought my Xperia SP a few days ago, and it has stock Android 4.1.2 installed. I have a few queries to its long-time owners:
I want to backup the ROM, in case I am fooling around and brick it. Is there a way to backup the ROM (or the TA partition, right?) without rooting the phone? I want to try the vanilla experience for a while. If not, what's the safe way to root without messing up the TA partition and losing the unique keys?
Also should I upgrade the ROM? Many people have complained about the phone getting slow after upgrading. Also, I read, in newer versions it becomes impossible to root without unlocking the bootloader, which will result in loss of DRM keys, removing some features.
Oh and some app recommendations would be nice too.
Is that McAfee app that comes preinstalled necessary?
Anyone tried encryption? Does it affect performance by a big factor?
I'm thinking of buying a transparent TPU case for the phone. Anyone knows where I can get one online?
Any other advice to a new owner is welcome too.

What's the easiest way if you only want root access, nothing else?

First of all, I have been using custom kernels and later rooting since Pocket PC 2002/Merlin, and I now have bought my first Sony (after just about every other brand of Android phone, no particular reason why I never had a Sony since the SE T68) because it's the only phone I can use with salt water spray on the screen and wet fingers. I do a lot of lobster, crayfish and crab fishing with traps and use an app called Fishing Poins to keep track of my pots and what I get where. Coming from Samsung (S5 was the latest I had) the rooting of a Sony seems rather cumbersome, but I have a few apps that need root access. LIke Air Audio to play music through an Airplay system. DLNA is useless to me, I want to stream the audio that I'm using on the phone directly to the whole house systen.
So can somebody please tell me what I do to get root access on Nougat (which my phone upgraded to before I saw that's what was happening, and no, I'm not big on reading long explanation screens, if it's a new phone and an official upgrade I am used to just doing it before I root on Samsung phones, since I have to unroot to install them later) and nothing else? For now I don't want to use any custom kernels or recovery, if I can avoid it. Just stock, rooted, like I could on my S5 (and Note 2, S4 Active and so on), please!
I did attempt the KingRoot app, but it didn't work. Also I have read a bit about that app that doesn't seem to good (Chinese spy fator app), so I did a full reset after the failed attempt. But if there's something similar that would be the perfect way of doing this. Of course I'm no stranger to ADB, so hooking it up to my pc is not a problem either.
1. Downgrade to any version of stock Marshmallow firmware with Xperifirm and Flashtool. Wipe everything and Exclude nothing (but *.ta - if any). Do not use FSC script! << FSC is now mandatory!
2. Backup your device's TA partition with Universal TA Backup tool.
3. Flash Nougat firmware (again with Xperifirm and Flashtool). Wipe everything and Exclude nothing (but *.ta - if any).
4. Unlock your device's bootloader
5. Follow this instructions to create/flash a custom kernel with root, and also DK.ftf (to fully reactivate sony's drm keys, which is wiped when bootloader is unlocked).
Anyway, try it at your own risk!
Thanks! So that's the method, which of course means deleting everything I've set up on the phone. Is there a chance there may be an easier, less destructive way during the next month or so? I can do without root access for that long.
oh, btw, by "custom kernel" do you mean that it will not be the original setup for the phone? I've been betatesting kernels on many devices, but nowadays I only want a phone that works without any hitches, and I want access to the official updates. That was easy on the Samsung phones, but maybe Sony is more different than I thought?
Oh, btw, maybe it is explained in the long post you directed me to, but I recently had an eye operation, and I would appreciate a shorter answer, before I get to the "how to", which takes me a while to read right now...
NEVER MIND THIS MESSAGE! Now I understand what Xperfirm is...
Also where would be a safe place to download ROMs from? Both the downgrade ROM and the Nougat ROM? I now really wish I hadn't let the thing upgrade before I took the TB backup (I'm still a bit unsure as to why I need that, I don't use any media with any form for DRM, but I guess better safe than sorry).
Mastiff said:
NEVER MIND THIS MESSAGE! Now I understand what Xperfirm is...
Also where would be a safe place to download ROMs from? Both the downgrade ROM and the Nougat ROM? I now really wish I hadn't let the thing upgrade before I took the TB backup (I'm still a bit unsure as to why I need that, I don't use any media with any form for DRM, but I guess better safe than sorry).
Click to expand...
Click to collapse
As far as I know there's no danger to download through Xperifirm, you need TA for guarantee reasons (if your phone need repair, not everywhere but for safety)
THanks, yeah. I have managed to read a bit and found out that Xperifirm downloads from the official Sony servers. Pain in the ass downloading, it breaks the download every couple of minutes. But that's probably Sony's servers, not the program. As for warranty, that's no problem in Norway since we have very strong consumer rights here. If an error can not be prooven to stem from rooting or other software stuff, it will be fixed. If I remember correctly Apple tried really hard to battle with the consumer rights officials about jailbreaking, but they had a very bloody defeat.
Seems like I have a problem. The Telenor Nougat ROM doesn't have a loader, according to Flashtool. Neither do the two other ROMs I have downloaded so far, but I'm trying again with a third, which doesn't have the "customised" moniker. So I hope that has a loader. But how do I upgrade again to Nougat, with the Norwegian version, when the Telenor ROM doesn't have a loader?
Mastiff said:
Seems like I have a problem. The Telenor Nougat ROM doesn't have a loader, according to Flashtool. Neither do the two other ROMs I have downloaded so far, but I'm trying again with a third, which doesn't have the "customised" moniker. So I hope that has a loader. But how do I upgrade again to Nougat, with the Norwegian version, when the Telenor ROM doesn't have a loader?
Click to expand...
Click to collapse
if your phone is locked(Bootloader),fix it using Xperia Companion..that way it upgrades automatically to Nougat.
if not,lock it using Flashtool first.
Well, the message was kind of badly worded, because I need to downgrade first of all. So I'm at the moment trying to get it to MM without messing up the TA partition. So anyway, this thread has been followed by others, I think this can be considered solved since there is only one way to get root on these phones.
What would be the best approach to rooting if you unlock your bootloader before learning about TA backup? I have since downgraded, done TA backup, upgraded, flashed TWRP, flashed SU/Magisk/phhSu, and saw two green checks in Magisk. Tried to continue to get the three checks by installing Sony framework v1 through Magisk and then Andros plus kernel, but got stuck on Sony screen on boot up. So I repeated steps and stopped after I got two checks, however after long use and simple phone restart, I lost root. Please HELP!

What is the best Android version for Z3 Compact?

Hi
My first post here and wondered if any of you would have a neat answer for me.
I am considering getting a Z3 Compact, and have been reading about it and it seems there may have been some issues with Android updates affecting thing slike battery life, etc. I know it can be taken as far as MARSHMALLOW, but some people say it is better to stay at LOLLIPOP, and I have found still other owners saying that they have flashed their phones back to KITKAT, and that this is the best match for the phone.
I am wondering if there is a best answer for what is the best version of Android to be using with this phone?
Thanks!
Robert
It's a very difficult question since it depends on what you mean what best is since the term is very subjective. IIf battery life is all you care about then I heard Kitkat is the best because they crippled the Stamina mode in later versions. But that means you will have a hopelessly outdated software when it comes to security updates, which I would think is more important than battery life. But if you want to software thats up to date then you cant be using stock ROM but which means you have to unlock the bootloader which leads to degradation in camera quality. So there are lots of factors to consider.
BrotherZero said:
It's a very difficult question since it depends on what you mean what best is since the term is very subjective. IIf battery life is all you care about then I heard Kitkat is the best because they crippled the Stamina mode in later versions. But that means you will have a hopelessly outdated software when it comes to security updates, which I would think is more important than battery life. But if you want to software thats up to date then you cant be using stock ROM but which means you have to unlock the bootloader which leads to degradation in camera quality. So there are lots of factors to consider.
Click to expand...
Click to collapse
Thanks BrotherZero
That's useful to hear. My preference would be to have the most recent OS available, which looks like MARSHMALLOW (I don't want to change bootloader and good camera is important)
My concern was just that battery life would be really poor with that. If it's still good I have no issue.
Worry has arisen because I had one for a couple of days that I sent back because the battery was draining very quickly indeed, and I am trying to work out if it is an OS issue before buying again (I really liked the phone)
If its just "not quite as good battery life on Marshmallow, but still very decent" then that's fine.
Thanks
R
rdpxi said:
Thanks BrotherZero
That's useful to hear. My preference would be to have the most recent OS available, which looks like MARSHMALLOW (I don't want to change bootloader and good camera is important)
My concern was just that battery life would be really poor with that. If it's still good I have no issue.
Worry has arisen because I had one for a couple of days that I sent back because the battery was draining very quickly indeed, and I am trying to work out if it is an OS issue before buying again (I really liked the phone)
If its just "not quite as good battery life on Marshmallow, but still very decent" then that's fine.
Thanks
R
Click to expand...
Click to collapse
I have flashed Kitkat, but I never used it for an extensive period (my phone was delivered with LP). I heard from numerous sources that battery life was exceptional on Kitkat, but it was really good on LP too for mer, so It wasn't like I needed better batterylife and add that Kitkat looked really outdated. With Marshmallow I thought I could slightly worse batterylife, but it wasnt a huge degradation either. So I think you will be fine on that.
About the camera, I don't know how good the quality is now on either LIneage OS or OmniROM (these are the ROMs I'm looking to flash my Z3c with now, they have the most up to date software right now and are also open source, Jaguar looks very interesting too, but the dev just dropped the project a month or so ago) but i felt the camera wasn't that good to begin with on Z3c any way. My LG phones (G2 and G4) always blew it out of the water and I don't think I ever seen a sony phone with a really good camera (which is weird since they make the sensor for everybody else). That's why I dont have any qualms abuot unlocking bootloader anymore.
BrotherZero said:
I have flashed Kitkat, but I never used it for an extensive period (my phone was delivered with LP). I heard from numerous sources that battery life was exceptional on Kitkat, but it was really good on LP too for mer, so It wasn't like I needed better batterylife and add that Kitkat looked really outdated. With Marshmallow I thought I could slightly worse batterylife, but it wasnt a huge degradation either. So I think you will be fine on that.
About the camera, I don't know how good the quality is now on either LIneage OS or OmniROM (these are the ROMs I'm looking to flash my Z3c with now, they have the most up to date software right now and are also open source, Jaguar looks very interesting too, but the dev just dropped the project a month or so ago) but i felt the camera wasn't that good to begin with on Z3c any way. My LG phones (G2 and G4) always blew it out of the water and I don't think I ever seen a sony phone with a really good camera (which is weird since they make the sensor for everybody else). That's why I dont have any qualms abuot unlocking bootloader anymore.
Click to expand...
Click to collapse
Thanks again
What I am hearing is that if I buy one, I can upgrade it to MMallow and all will be fine, which is kind of what I was hoping to hear.
I've spent three years with an S4 Mini, so I think the camera will be a huge step up whatever I do to it!!
R
After the last marshmallow update the battery life seems the same if not better with lollipop also the Phone is faster. Just Do a full repair to be sure after updating it to the last Version from sonys tool.
I would unlock the bootloader and install new LineageOS,I am running it and it is amazing,camera is rock solid and performance is amazing
rdpxi said:
Thanks again
What I am hearing is that if I buy one, I can upgrade it to MMallow and all will be fine, which is kind of what I was hoping to hear.
I've spent three years with an S4 Mini, so I think the camera will be a huge step up whatever I do to it!!
R
Click to expand...
Click to collapse
S4 mini's camera is really cool ( had that phone before my z3 compact too! )
For months, I've been using the 4.4 version for my Z3 Compact, cause I sipmly find the camera tons better than Marshmallow! ( Haven't tried Lollipop, I bought the phone with Marshmallow installed! )
On Marshmallow , while you're on the viewfinder, the touch to focus function doesn't work for me! ( I have to tap on the screen to choose where I want to focus, and then use the camera dedicated button, so that the camera starts focusing, while on Kitkat, I just tap , and it focuses immidiately)
Auto focus while video recording is horrible as well, while on Kitkat the autofocus is really fast.
I even found playing GTA San Andreas smoother at 4.4.
What I want to say is that staying at old versions isn't always bad. Sometimes old is gold.
Thanks to all of you responding.
Couple of things:
1 . what do you mean by "do a full repair" after updating?
2. how difficult is doing something like fiddling wth bootloader and installing Lineage? (I probably wouldn't go that far TBH)
On the second question, and also because you're concerned about the camera, if you unlock the bootloader the phone wipes DRM keys that are needed for integration with various functionns. The camera quality will be greatly reduced, audio effects will be reduced, and some other stuff that I was never concerned with and thus don't know what they are. You can backup the DRM keys and restore them after relocking the bootloader for use on a stock ROM, which is a process you'de need to search and find out how to do and isn't too complicated at the moment, however running anything that isn't stock, Lineage, Jaguar, Cyanogenmod, etc, requires an unlocked bootloader and camera quality is going to suffer on these ROMs. Also, if you don't back up the DRM keys properly and unlock the bootloader, you're screwed when it comes to getting them back; they will be deleted forever.
As for fiddling with the bootloader and installing a ROM goes, you need to go to a Sony webpage to unlock it. This voids your warranty. You then use fastboot to install a custom recovery, TWRP usually, and flash the ROM. You can relock it using a tool called Flashtool, which is found in the Z3 compact section somewhere, but you can't use a custom ROM while the bootloader is locked nor use the full features that are included with the stock ROM and will have reduced camera quality and a sligtly distorted image; relocking the bootloader is for the purpose of using Flashtool to put a stock ROM back and restore the (hopefully backed up) DRM keys.
Keep in mind that there are stock ROMs that have been modified to have a locked bootloader, root, implement TWRP where it isn't detected by the phone (so DRM keys still work), xposed can be flashed, etc, etc.
All of this would be a little daunting for someone swithing to the phone right now because the frustrations and progress have been incremental and there isn't a really clear thread I know of that lays it all out, like Backup DRM keys like this, Unlock the Bootloader like this, Install TWRP like this, Download Flashtool here, Relock the bootloader like this, Install a Stock ROM like this, Restore DRM keys like this, Install a rooted stock ROM like this, etc. That said, if you've been on the forum for any length of time it should go okay, the main concern is backing up your DRM keys and once that is done the only concern is, like any other phone, bricking it. If you don't need root and want a good camera, then the question is if you're content with Marshmallow and the fact that there aren't any future updates, or more acurately, you can have root on Marshmallow and a good camera (the current method on the latest stock Marshmallow is the easiest its ever been to get root), but there aren't any future updates.
Hi PantsDownJedi, could you pls share the link to the safest method to get root on Marshmallow, leaving the locked bootloader untouched? Thanks!
---------- Post added at 11:04 PM ---------- Previous post was at 10:17 PM ----------
PantsDownJedi said:
On the second question, and also because you're concerned about the camera, if you unlock the bootloader the phone wipes DRM keys that are needed for integration with various functionns. The camera quality will be greatly reduced, audio effects will be reduced, and some other stuff that I was never concerned with and thus don't know what they are. You can backup the DRM keys and restore them after relocking the bootloader for use on a stock ROM, which is a process you'de need to search and find out how to do and isn't too complicated at the moment, however running anything that isn't stock, Lineage, Jaguar, Cyanogenmod, etc, requires an unlocked bootloader and camera quality is going to suffer on these ROMs. Also, if you don't back up the DRM keys properly and unlock the bootloader, you're screwed when it comes to getting them back; they will be deleted forever.
As for fiddling with the bootloader and installing a ROM goes, you need to go to a Sony webpage to unlock it. This voids your warranty. You then use fastboot to install a custom recovery, TWRP usually, and flash the ROM. You can relock it using a tool called Flashtool, which is found in the Z3 compact section somewhere, but you can't use a custom ROM while the bootloader is locked nor use the full features that are included with the stock ROM and will have reduced camera quality and a sligtly distorted image; relocking the bootloader is for the purpose of using Flashtool to put a stock ROM back and restore the (hopefully backed up) DRM keys.
Keep in mind that there are stock ROMs that have been modified to have a locked bootloader, root, implement TWRP where it isn't detected by the phone (so DRM keys still work), xposed can be flashed, etc, etc.
All of this would be a little daunting for someone swithing to the phone right now because the frustrations and progress have been incremental and there isn't a really clear thread I know of that lays it all out, like Backup DRM keys like this, Unlock the Bootloader like this, Install TWRP like this, Download Flashtool here, Relock the bootloader like this, Install a Stock ROM like this, Restore DRM keys like this, Install a rooted stock ROM like this, etc. That said, if you've been on the forum for any length of time it should go okay, the main concern is backing up your DRM keys and once that is done the only concern is, like any other phone, bricking it. If you don't need root and want a good camera, then the question is if you're content with Marshmallow and the fact that there aren't any future updates, or more acurately, you can have root on Marshmallow and a good camera (the current method on the latest stock Marshmallow is the easiest its ever been to get root), but there aren't any future updates.
Click to expand...
Click to collapse
Hi PantsDownJedi, could you pls share the link to the safest method to get root on Marshmallow, leaving the locked bootloader untouched? Thanks!
liviugi said:
Hi PantsDownJedi, could you pls share the link to the safest method to get root on Marshmallow, leaving the locked bootloader untouched? Thanks!
---------- Post added at 11:04 PM ---------- Previous post was at 10:17 PM ----------
Hi PantsDownJedi, could you pls share the link to the safest method to get root on Marshmallow, leaving the locked bootloader untouched? Thanks!
Click to expand...
Click to collapse
Recovery & Root for MM .575 & .291 LB
https://forum.xda-developers.com/showthread.php?t=3418714
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