[Q] Need some info about flashing kernel - locked/unlocked bootloader. - Xperia Z2 Q&A, Help & Troubleshooting

Hey guys,
First of i'm not sure if this is a appropriate thread to ask this, if not i'm sorry and will move/remove it.
Anyways it's been awhile since i've been in the android scene and xda in general, had an iphone for about a year or two and just recently got my Z2:victory: so i'm back but things changed a little and i need a little info if anyone can help,
Basically i'm looking to flash [Xperia Z2] DooMKernel v09 kernel but i read it requires an unlocked bootloader... so basically i need to know if my bootloaders unlocked now that i flashed recovery (check signature) (Does flashing recovery unlock a bootloader?) and can i just flash the zip?
or do i need to still unlock my bootloader even though i have dual recovery and then flash the kernel?

Your bootloader is still locked, what you did is you installed recovery for locked bootloader.
Do not try to flash custom kernel on locked bootloader, you'll soft brick your phone.
What you need in order to flash custom kernel is to unlock bootloader, but firstly you need to back up your TA keys ( click here )
For more info click HERE (about unlocking)
Proceed carefully!
Regards!

hey thanks for the info, that' clears up everything, I did already backup my TA partition so I guess all I need to do is unlock bootloader then flash the kernel! quick question have you flashed your kernel? I know I read the info an features of it but is there any upside to it on a z2? my device is pretty fast an stable as is, just looking for a reason to flash mine, any further advice you can give me? is it worth it?

Zeyn Karim said:
hey thanks for the info, that' clears up everything, I did already backup my TA partition so I guess all I need to do is unlock bootloader then flash the kernel! quick question have you flashed your kernel? I know I read the info an features of it but is there any upside to it on a z2? my device is pretty fast an stable as is, just looking for a reason to flash mine, any further advice you can give me? is it worth it?
Click to expand...
Click to collapse
Well to be honest, I haven't, I didn't find any reason to do so, the stock is doing good for me at the moment.
As for the side affects, or as you say upside downs, there is no any, not at least that I'm aware of, but as far as I saw it's not compatible with every rom, only with stock as with stock based ones, I mean developer does not guarantee for it's stability if it's being used along with any other rom. I have rooted and flashed recoveries only to use existenz rom. I heard for Doomlord's kernel, that it has "fix" for a video recorder mic, you can control it's sensitivity and it's far more battery friendly.

Ah I see! thanks, think I'll stick with the stock kernel for the time being, I don't have any complaints at the moment with it but if I ever do decide to switch to the doom kernel atleast I know what to do first, I've got one last question though sorry, do I need to unlock my bootloader to flash a custom rom? I don't think I do, I'm pretty sure I don't, but just want to make sure, used to have only low end droid devices back in the day when I used to be here, didn't have things like dual recoveries etc so yeah I'm kind of reading an learning as I'm going along, pretty awesome device though sleek and powerful I've only been doing minor adjustments to the stock rom using xposed modules, haven't used a custom rom as yet but I will soon...

Zeyn Karim said:
Ah I see! thanks, think I'll stick with the stock kernel for the time being, I don't have any complaints at the moment with it but if I ever do decide to switch to the doom kernel atleast I know what to do first, I've got one last question though sorry, do I need to unlock my bootloader to flash a custom rom? I don't think I do, I'm pretty sure I don't, but just want to make sure, used to have only low end droid devices back in the day when I used to be here, didn't have things like dual recoveries etc so yeah I'm kind of reading an learning as I'm going along, pretty awesome device though sleek and powerful I've only been doing minor adjustments to the stock rom using xposed modules, haven't used a custom rom as yet but I will soon...
Click to expand...
Click to collapse
Well, yes and no, LB means its for locked bootloaders and UB means for unlocked bootloaders, search for those to two words when you find the rom which you can flash.
Some roms require unlocking, some do not. All stock based roms usually dont require, but as I told you, it will be stated in Rom's thread name or in OP.
Regards!

Ah! I'll be sure to look out for those, thanks for the valuable info, think that's all I needed to find out. I should be ok from here on out

Related

ROM's and rooting for the Prime

Hi all,
I currently own a HTC Wildfire and have squeezed everything out of it by rooting/roms/root apps etc. So I know the benefits of rooting and used it on my HTC mainly to speed it up (it only has a 528mhz cpu, no gpu so things stock are pretty slow ) and remove the HTC crap apps. Now, as the Prime is already so fast and can handle almost anything, I wonder if there is any benefit of installing a custom ROM on it. I'm surely going to root it when I get it (to OC and f.e. Titanium Backup), but why a custom ROM when ASUS updates the Prime often enough? And one other thing, what is the size of the dev community concerning the prime. The wildfire had a really large community with lots of Rom's, but I obviously don't know about this Transformer.
Thanks in advance
Why? Simply to make a fast prime even Faster.
Sent from my Transformer Prime TF201 using XDA
Jonphinguyen7 said:
Why? Simply to make a fast prime even Faster.
Sent from my Transformer Prime TF201 using XDA
Click to expand...
Click to collapse
I was already planning to do so But what about the ROM's. Do they actually add any extra functionality that is not present in the stock rom?
tobitronics said:
I was already planning to do so But what about the ROM's. Do they actually add any extra functionality that is not present in the stock rom?
Click to expand...
Click to collapse
yes they do. just head over to developement section and look at the features list for each rom. there is also another feature packed rom, AOKP, but its not hosted on this site anymore. its on another forum. just Google for it and you should be able to find it. We also have custom kernels that adds alot of kernel optimization like memory tweaks, 1.8Ghz overclock, and other things. Motley & Shaky have custom kernels in prime developement section. just head over there and check out those feature lists also. Tons of improvements made over stock kernel.
There are also some Cornerstone ROMs available, which give you a completely new experience and definitely extend the Android tablet experience.
Root ver.21 with unlocked Bootloader
Hello,
i'm a new tf201 user and was be able to make CWM 5.8.2.0 after unlocked the Bootloader without to root the transformer Prime. Now, i don't know how to root it, because the update is up to day ver.21.
I read always to downgrade to Version 15 or 17, and then root and upgrade to version 21, but on a tf201 with locked Bootloader. What can i do with an unlocked Bootloader?
Andres73garcia said:
Hello,
i'm a new tf201 user and was be able to make CWM 5.8.2.0 after unlocked the Bootloader without to root the transformer Prime. Now, i don't know how to root it, because the update is up to day ver.21.
I read always to downgrade to Version 15 or 17, and then root and upgrade to version 21, but on a tf201 with locked Bootloader. What can i do with an unlocked Bootloader?
Click to expand...
Click to collapse
if you already unlocked, you don't even need to use conventional methods of rooting. Just flash anyone of the custom roms available as all of them have root built into them. If you want a stock rom just rooted, there's a custom one for that also that all you have to do is flash it. Whatever you do, don't try to flash Asus official roms from their website. Only flash custom roms from here or another site.
So now that you're unlocked , you have a choice of flashing a rooted, plain stock rom. no changes other than root. Or you can flash any one of the custom roms here. which all have root built into them. just make sure to read up on all of them and how to properly install.
edit: i just noticed you said you have CWM and unlocked. You only can flash CWM if you're already rooted and unlocked. Installing CWM app is does not mean you flashed CWM recovery. You have to do that within the app. then you power down and boot into recovery to make sure it worked. unlocking the prime wont make you lose root. Install an app called "root checker" from the marketplace. Its free and will let you know if you're still rooted or not.
demandarin said:
if you already unlocked, you don't even need to use conventional methods of rooting. Just flash anyone of the custom roms available as all of them have root built into them. If you want a stock rom just rooted, there's a custom one for that also that all you have to do is flash it. Whatever you do, don't try to flash Asus official roms from their website. Only flash custom roms from here or another site.
So now that you're unlocked , you have a choice of flashing a rooted, plain stock rom. no changes other than root. Or you can flash any one of the custom roms here. which all have root built into them. just make sure to read up on all of them and how to properly install.
edit: i just noticed you said you have CWM and unlocked. You only can flash CWM if you're already rooted and unlocked. Installing CWM app is does not mean you flashed CWM recovery. You have to do that within the app. then you power down and boot into recovery to make sure it worked. unlocking the prime wont make you lose root. Install an app called "root checker" from the marketplace. Its free and will let you know if you're still rooted or not.
Click to expand...
Click to collapse
Well, when i start the display shows "unlocked Bootloader" and if i press volume down and power, i get the CWM 5.8.2.0. Then i can navigate to choose zip and i see the sd-card. But on the root checker, i get the message "no Rooted". Well, first of all, thanks for your kindness.
This afternoon I download the ROM you mention, and proof that he takes it. We comment on the result.
Andres73garcia said:
Well, when i start the display shows "unlocked Bootloader" and if i press volume down and power, i get the CWM 5.8.2.0. Then i can navigate to choose zip and i see the sd-card. But on the root checker, i get the message "no Rooted". Well, first of all, thanks for your kindness.
This afternoon I download the ROM you mention, and proof that he takes it. We comment on the result.
Click to expand...
Click to collapse
Thank you, run to the first. Now i tested the new Rom and tell you more . Thanks, thanks, thanks........
I've looked around the dev section and I wonder what the benefits are of unlocking your tab with the Asus unlock tool. Do you really need it to flash cwm and/or a custom rom?
Sent from my HTC Wildfire using XDA
Andres73garcia said:
Thank you, run to the first. Now i tested the new Rom and tell you more . Thanks, thanks, thanks........
Click to expand...
Click to collapse
you welcome
tobitronics said:
I've looked around the dev section and I wonder what the benefits are of unlocking your tab with the Asus unlock tool. Do you really need it to flash cwm and/or a custom rom?
Sent from my HTC Wildfire using XDA
Click to expand...
Click to collapse
no one really needs to do it. Its a choice whether you want to or not. its already been well explained as to why people do so.
So in short, if you want to try custom roms/kernels that run better than stock rom and have features & optimization not found on stock, then you need to root, then unlock, then install CWM , then flash recovery from within that app, then flash rom/kernel of your choice.
Some roms change up the look and feel of the tablet, for the better of course. some add functionality benefits you will never see on a stock rom.
demandarin said:
you welcome
no one really needs to do it. Its a choice whether you want to or not. its already been well explained as to why people do so.
So in short, if you want to try custom roms/kernels that run better than stock rom and have features & optimization not found on stock, then you need to root, then unlock, then install CWM , then flash recovery from within that app, then flash rom/kernel of your choice.
Some roms change up the look and feel of the tablet, for the better of course. some add functionality benefits you will never see on a stock rom.
Click to expand...
Click to collapse
So if I understand it correctly you only can install a custom rom when you have unlocked the bootloader, right?
Sent from my HTC Wildfire using XDA
resell value?
need advice!
do you guys think that unlocking the prime will reduce its resell value?
I've always unlocked devices but I've always reverted them to their original state before selling them. it seems once unlocked, OTA's won't be possible anymore. Do you think instaling a stock-like rom will do the job?
I haven't seen anyone mention this fact about unlocking and I thought this thread is the appropriate one.
Thanks for your input everyone!
Resale only matters in terms of value if there's an active warranty on the device or not. If there isn't, then it's probably going to INCREASE the resale value if you move off the stock ROM and onto a "Stock like" (Primalicious, Virtuous Prime, etc), along with a proper recovery setup, on account of the fact that once set up in such a manner, it requires gold standard stupidity to brick the device.
That said, if it -does- still have a working warranty and you've not unlocked the bootloader, it's generally considered good for the value of the prime to not fiddle with it (stock primes are getting RMA'd with increasing frequency, word around the campfire is that the .21 update has caused a lot more hassle than it ever fixed).
I'm somewhat wondering if ASUS may end up recalling the original primes and replacing them / refurbishing them up to C4 spec on the house, regardless of bootloader status, as the mess with WiFi and Bluetooth seems a bit too widespread.

[Q] Why no CyanogenMod?

I ran CM7 nightlies on my DInc2 and updated to the stable version the day it came out. Technically, I am a noob so I really don't know what I am doing, I just know what I like and I can follow directions. (Except for Matt's ICS update when I forgot to protect the root and had to start over with .181, doh!)
Why is it that CyanogenMod is unavailable for one of the hottest phones on the market? Is it because of the locked boot loader? (which I will have to look up cause I don't even know what the heck a boot loader is anyway)
It's not über important, I just really miss my CM7 and was wondering if anyone knew the answer.
Locked bootloader= no custom kernals also there is cm9 but not cm7 nobody wants cm7 anymore ....
Sent from my Spectrum....Verizon's most underrated phone
You don't need custom kernels to have official CM.
That being said, our devs are hard at work on making a fully functional CM ROM - thing is though, since we have to work around the kernel that our devices are working using a process called "2nd-init", since we have locked bootloaders, everything is taking a lot longer and is a lot harder.
We have a partially working CM9 ROM over at http://droidhive.com. We also have AOKP.
Would you recommend a partially working version for noob who really loves CM?
jdadad23 said:
Would you recommend a partially working version for noob who really loves CM?
Click to expand...
Click to collapse
Get the fist leaked ICS. It is cool.
Sent from my DROID RAZR using XDA Premium App
I am running 4.0.3. I agree, it is cool. I still think I prefer CM.
CM isn't necessary at this point in time.
hy,
i am quite sure this questions wer answered x-times, but i didn´t find the answer in the forum, so i will ask:
1) Can we expect that the Bootloader will ever be UNLOCKED?
2) Are some DEV´s (and who?) working on it? Do they inform the folk on ex. twitter or so, like the iPhone guys (musclenerd, pod2g, ionic,...)
3) I already updated to ICS-TMobile-Leak, is my bootloader now different to the one in GB?
somehow i thought, i shoud write a NEW post, but i hope its okay to ask here, coz +1(wanna hav CM9 toooo)
greets
lordvampire said:
hy,
i am quite sure this questions wer answered x-times, but i didn´t find the answer in the forum, so i will ask:
1) Can we expect that the Bootloader will ever be UNLOCKED?
2) Are some DEV´s (and who?) working on it? Do they inform the folk on ex. twitter or so, like the iPhone guys (musclenerd, pod2g, ionic,...)
3) I already updated to ICS-TMobile-Leak, is my bootloader now different to the one in GB?
somehow i thought, i shoud write a NEW post, but i hope its okay to ask here, coz +1(wanna hav CM9 toooo)
greets
Click to expand...
Click to collapse
1. I think only Moto can unlock the bootloader, cause someone else told me it's an hard work because of 3 layers of encrypted code (I don't know what it means!)...it requires a lot of time and a powerfull machine
2. see n°1, Eternity project team are working on a bypass for bootloader (kexec)
3. ICS Bootloader is different from GB one, I guess.
draga277 said:
1. I think only Moto can unlock the bootloader, cause someone else told me it's an hard work because of 3 layers of encrypted code (I don't know what it means!)...it requires a lot of time and a powerfull machine
2. see n°1, Eternity project team are working on a bypass for bootloader (kexec)
3. ICS Bootloader is different from GB one, I guess.
Click to expand...
Click to collapse
and if this kexec is developed, we can flash costum kernels and so CM9 too???
yes.
lordvampire said:
and if this kexec is developed, we can flash costum kernels and so CM9 too???
Click to expand...
Click to collapse
Wait a moment...kexec is not necessary for CM9 flashing...you can flash modded rom, yet.
kexec (or unlocked bootloader) is required for mod kernels!
I am on icsleak, means i cannot flash costum rom as long as devs are not developing roms for my existing kernel right?
So i need to have kexec to bypass the kernel flashing to flash a costum rom...
Sent from my XT910 using Tapatalk
lordvampire said:
I am on icsleak, means i cannot flash costum rom as long as devs are not developing roms for my existing kernel right?
So i need to have kexec to bypass the kernel flashing to flash a costum rom...
Sent from my XT910 using Tapatalk
Click to expand...
Click to collapse
First phrase. Yes, I think so, if you can't downgrade to GB, as I guess
Second hrare. I don't know if kexec gives you this opportunity. You have always to flash a compatible kernel with a custom rom, its or others. This is my guess, someone else can confirm or not?

[Q] Newbie : Using custom roms, unlock bl etc.

Hello guys
I want to use certain custom roms and upgrade from my 2.1 ....
I kept reading 10-15 threads but I'm still a bit confused so just in case, i'll ask just to be sure and avoid bricking it.
So, here's the info of my phone :
1. Xpeia X10 Mini Pro U20i
2. Manufacture Date : 10W35
3. Base Band Version : M76XX-TSNCJOLYM-53404006
4. Kernel Verion : 2.6.29
5. Firmware Version 2.1
Now, I posted everything ...
Few questions:
1. Is there a chance of briking it ?
2. In order to install custom ROMS, I need to unlock the bootloader first?
Now ....
I do read the threads fully, but being a noob coming to this .. (not stupid thouh ) .. it's a bit confusing but I will manage to do it .. just need some starting points.
So, anything I should do before flashing the ROM , please enumerate here.
Thanks
maxijuni0r said:
Hello guys
I want to use certain custom roms and upgrade from my 2.1 ....
..
Thanks
Click to expand...
Click to collapse
First of all, you need to update your firmware, the baseband needs to read 4015 on the end before you install any roms.
Second: There are ROMS that will run fine on your current kernel, so if you choose one of those, there is no need to unlock the bootloader.
If you want to run a ROM that states it needs a custom (usually nAa) kernel, then you do need to unlock your bootloader, otherwise you can't flash the new kernel.
With the 10w35 datestamp you won't get a hard brick with unlocking, but it may still go wrong, depending on some other factors, namely your simlock-certificate.
I would recommend to start with a rom that runs on stock kernel, to get some experience, and do the other things once you feel more comfortable
SmG67 said:
First of all, you need to update your firmware, the baseband needs to read 4015 on the end before you install any roms.
Second: There are ROMS that will run fine on your current kernel, so if you choose one of those, there is no need to unlock the bootloader.
If you want to run a ROM that states it needs a custom (usually nAa) kernel, then you do need to unlock your bootloader, otherwise you can't flash the new kernel.
With the 10w35 datestamp you won't get a hard brick with unlocking, but it may still go wrong, depending on some other factors, namely your simlock-certificate.
I would recommend to start with a rom that runs on stock kernel, to get some experience, and do the other things once you feel more comfortable
Click to expand...
Click to collapse
Thanks man ...
This is exactly the info I needed ... I will start with a stock one, need to find now how to update my firmware.
By the way, is there a way of getting adobe flash ...after update ? If so, is there any ROM you suggest in that matter ?
maxijuni0r said:
Thanks man ...
This is exactly the info I needed ... I will start with a stock one, need to find now how to update my firmware.
By the way, is there a way of getting adobe flash ...after update ? If so, is there any ROM you suggest in that matter ?
Click to expand...
Click to collapse
If I remember correctly Android supported flash since 2.2 frozen yogurt, so any custom roms could run it, you'll just have to find the flashplayer for armv6, there should be a link somewhere on this forum. Try the Mini Themes and Apps section
Never be afraid of flashing. Because you can always recover it. the only tough thing is unlocking the BL. read carefully and pay attention. Goodluck.
PS if you HARD BRICK your phone because you fail to unlock the BL it can still be repaired via JTAG.
zenesis said:
Never be afraid of flashing. Because you can always recover it. the only tough thing is unlocking the BL. read carefully and pay attention. Goodluck.
PS if you HARD BRICK your phone because you fail to unlock the BL it can still be repaired via JTAG.
Click to expand...
Click to collapse
Thanks man for the warnings .
I kept reading for two days now I'm ready to do it ....
Wish me luck.

[Q] I Have Some Questions! (Please Help)

Hello, i picked up the s4 yesterday from verizon. Well, stupid me, i updated it right when i got it not knowing that i would not be able to root.
Anyways, i know alot of developers are trying to find a bypass/etc.
Here are the questions i have!
Once they find a bypass and i can root, can i use this recovery?
http://forum.xda-developers.com/show....php?t=2281367
If i flash cm10, once i root of course will i have to flash a kernal? If its not required i may want to, And would i flash it before or after i install cm10?
http://forum.xda-developers.com/show....php?t=2305263
Kernel
http://forum.xda-developers.com/show....php?t=2319243
Do you think the developers will be able to unlock the stupid bootloader?
And how many numbers on the flash counter will it take to come up with a triangle?
Thank you so much, sorry for all the questions!
Note-i am no noob with flashing/roms etc, i had a droid x2 and flashed every rom out there, samsung is a whole lot different with different kernels, the flash counter, etc!
Galaxys4bean said:
Hello, i picked up the s4 yesterday from verizon. Well, stupid me, i updated it right when i got it not knowing that i would not be able to root.
Anyways, i know alot of developers are trying to find a bypass/etc.
Here are the questions i have!
Once they find a bypass and i can root, can i use this recovery?
http://forum.xda-developers.com/show....php?t=2281367
If i flash cm10, once i root of course will i have to flash a kernal? If its not required i may want to, And would i flash it before or after i install cm10?
http://forum.xda-developers.com/show....php?t=2305263
Kernel
http://forum.xda-developers.com/show....php?t=2319243
Do you think the developers will be able to unlock the stupid bootloader?
And how many numbers on the flash counter will it take to come up with a triangle?
Thank you so much, sorry for all the questions!
Note-i am no noob with flashing/roms etc, i had a droid x2 and flashed every rom out there, samsung is a whole lot different with different kernels, the flash counter, etc!
Click to expand...
Click to collapse
U would be able to use any kernel just as long its for the s4 and for the rom u choose, I have tried just about all of them but always went back to the stock kernel for battery life. I've always flashed the kernel after the rom. As far as recovery I prefer twrp but when I used any aokp or aosp I used cwm. Really shouldn't make much difference. Hope I've helped u some.
Thanks
prboricua15 said:
U would be able to use any kernel just as long its for the s4 and for the rom u choose, I have tried just about all of them but always went back to the stock kernel for battery life. I've always flashed the kernel after the rom. As far as recovery I prefer twrp but when I used any aokp or aosp I used cwm. Really shouldn't make much difference. Hope I've helped u some.
Click to expand...
Click to collapse
You did, thanks alot, im starting to learn, do you know if they have a bypass yet to root when you installed the newest ota update?
Galaxys4bean said:
You did, thanks alot, im starting to learn, do you know if they have a bypass yet to root when you installed the newest ota update?
Click to expand...
Click to collapse
Nothing yet, I updated my new 32 gig s4 without knowing, once I found out I called Verizon and told them I was having data issues and they send me out another which will be activated and then pulling sim, rooting, and flashing. Hopefully they all haven't been updated.

[q] so confusing new owner

just smashed my oneplus one so the other half has gave me her z2,
managed to root it on 4.4.4 and have Clockwork Recovery,
it so much more difficult to flash roms...
basically im looking for a rom with good battery life and good camera mods,
can some one just give me the heads up, do i still need to downgrade to 4.4.2 do i need to install dual recovery
and any tips on roms
cheers
based on what you wrote i'm assuming to rooted through unlocking your bootloader, which has voided your warranty and resulted in losing your DRM keys, now you don't have to downgrade for anything. that is required if you don't have a rooted phone and need to root without unlocking bootloader.
now you can simply flash any new rom. there are multiple choices, but only two lollipop roms available right now based on stock, Existez Y and Moonwalker Provolution, both are available in development section. personally i'm using Existenz Y as the black design in Provolution was not exactly my cup of tea, and it has some terrific options as ambient display and changing navbar size inbuilt without the need of xposed. otherwise there are multiple AOSP and CM based ROMS available in both development and orig development section. for flashing steps please read them on OP of each rom, and go through the threads properly before asking for them in new posts or threads.
thank you very much for writing back to me , yes i have unlocked the bootloader ,
reading Exstez topic it mentions about flashing latest firmware and adding dual recovery?
just checked Moonwalkers
You Must To Be Sure You Are On Firmware .726[LP] Or .28[LP]
Click to expand...
Click to collapse
sutty86 said:
thank you very much for writing back to me , yes i have unlocked the bootloader ,
reading Exstez topic it mentions about flashing latest firmware and adding dual recovery?
Click to expand...
Click to collapse
That is required if you are on LB and have dual recovery. i dont think if you have unlocked bootloader you need dual recovery. you can use normal recovery to flash. anyway dual recovery is available for UB also so you can use that. provides you with more option and i personally prefer that.
sutty86 said:
just checked Moonwalkers
Click to expand...
Click to collapse
Yes for moonwalker its recommended that you come from LP base. but i'm not sure how you can go back to stock after unlocking your BL. can't flash stock FTF normally as it might brick the device. might want to check sticky threads for getting to LP on unlocked bootloader. creating a prerooted firmware might help you in that. since i have a locked BL dont really know a lot about that part.
Just a heads up, since you unlocked your boot Loader the camera low light performance will be significantly bad and other Sony exclusive apps might not work. Hopefully you backed up TA partition.

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