Is it possible to upgrade to Kitkat with a locked bootloader? - Xperia Arc Q&A, Help & Troubleshooting

I have an Arc Lt15a with a bootloader that can't be unlocked. Am I stuck with Ginger bread or can I update to Kitkat? Some apps I want need Kitkat. Thanks in advance.

You're stuck with GB or ICS.
僕のLT18iから送られてきた

As popthosegaskets said, you won't be able to. KitKat requires own kernel with proper ramdisk, which can only be flashed by having unlocked bootloader.

Related

[Q] Root, Bootloader and Kernel

I have some question about this.
I want to o/c my xperia arc and for this i have to download another kernel, like doomlord kernel, but with the coming of ICS update (official) I wonder if i could get it if I change my kernel and/or my bootloader ?
If your bootloader is unlocked then do install the official update, (over-the-air or pc companion) because your phone will become bricked.
However you can Re-Lock your bootloader first then install the update.
to answer your question, you can only change the kernel if your bootloader is unlocked.

[Q] How to backup my stock rom

I just got my Arc S, and i want to check out few different custom roms. I was planing on rooting the device with Easy rooting toolkit, so the question is, how can i backup my stock rom and reflash it, if i ever need it for warranty issues? (Also maybe to get the official 4.0 update next year )
On my previous phone (HTC Desire) it was pretty easy, by restoring the Nandroid backup that i created after rooting the device. How about the Xperia? Is there something similar?
And while we are here, any suggestion for some stable custom roms for the Arc S? Thanks
If you only want to root your device, you can simply unroot the device.
But you don't really have to, when you update your device using PCC or SEUS, the root is gone.
http://forum.xda-developers.com/showthread.php?p=18879974#post18879974
If you decide to unlock your bootloader to flash custom kernels/ROMs, you have to relock it, when you want to update your firmware using PCC or SEUS.
http://forum.xda-developers.com/showthread.php?t=1134335
And which custom ROM you like is your decision, but I'm still a CM7 fan.
I have root, if I want to return to stock ROM (without root) I can just use SEUS to update my phone and the root is gone?
hdplsa said:
I have root, if I want to return to stock ROM (without root) I can just use SEUS to update my phone and the root is gone?
Click to expand...
Click to collapse
If your bootloader is locked yes.
I rooted my arc with EasyRooting toolkit,
How do I know if my bootloader is locked or not?
Edit: I checked by the service info, it says
Rooting status:
Bootloader unlock allowed: No
I am guessing that means my bootloader is locked?
Aiceball said:
I am guessing that means my bootloader is locked?
Click to expand...
Click to collapse
Yes, it is.
And if you root, it doesn't, mean you've a unlocked BL.
Btw, you can't unlock your BL using the official method.
If you still want to unlock your BL, contact Jinx13.

Rooted Stock 2.3.4 ROM?

Is there already a stock rooted 2.3.4 ROM?
I have an unlocked bootloader, and want stock 2.3.4 look with root functionality
Is there a ROM for this?
johnnzey said:
Is there already a stock rooted 2.3.4 ROM?
I have an unlocked bootloader, and want stock 2.3.4 look with root functionality
Is there a ROM for this?
Click to expand...
Click to collapse
Then Just Root your phone, you don't need a custom Rom to have it rooted.
You can use Zergrush, PSNeuter and another method which I don't remember.
Or you can even have flashtool do it for you.
On 2.3.3 from my understanding you can root 2.3.4 stopped rooting and being unlocked if u go to 2.3.3 root and ota to 2.3.4 u will have a nice shiny brick I have a rooted 2.3.4 Android but won't use it as wifi is broke it wont connect but 2.3.3 would when I was unlocked so I could be wrong tho
Sent from my R800x Unlocked with doomkernal
try the jokawild rom, i think it looks more of stock rom

[Q] [probably important] Does this way work ?

Since firmware .62 can't be rooted without unlocking bootloader.
I did unlock the bootloader and rooted the system by flashing RootXperia zip
And now I am thinking of re-locking the bootloader using this method
Will I still be able to use root permissions after re-locking ?​
Well it should I don't see why not but if It don't you can flash to I think .58 which is rootable (correct me if I'm wrong) and then relock your BL and then root it and do a OTA root keeper and you should be set
sent from my Sony Ericsson Xperia Play™ Running Slimbean 3.0 using Tapatalk 2™

[Q] Installing custom roms on Arc S with locked boot loader

I'd just like to say hi to everyone, my name is Mick.
I have an Arc S, originally running GB, but currently running ICS, build 4.1.A.0.562 which I updated to via SEUS a while ago.
I've used DoomLord's one click method to root the phone, have CWM installed, and I've been happy with it since, but I've now decided to see about installing a custom rom.
I've done a lot of reading on here about locked and unlocked boot loaders, and mine's locked so a bit restrictive in what I can do I gather.
What I'd like to know is, a lot of the roms for locked bl's, say based on, or must have, the .587 build, but mine is the earlier .562.
What is the best way to proceed?
Can I flash the .587 kernel with flashtool as I've read that the stock, signed kernels can be flashed on locked bls. Is this right, and does flashing a stock .587 kernel affect rooting?
Any help, or links to whatever I haven't found yet, would be much appreciated.
Cheers,
Mick.
MickieH said:
I'd just like to say hi to everyone, my name is Mick.
I have an Arc S, originally running GB, but currently running ICS, build 4.1.A.0.562 which I updated to via SEUS a while ago.
I've used DoomLord's one click method to root the phone, have CWM installed, and I've been happy with it since, but I've now decided to see about installing a custom rom.
I've done a lot of reading on here about locked and unlocked boot loaders, and mine's locked so a bit restrictive in what I can do I gather.
What I'd like to know is, a lot of the roms for locked bl's, say based on, or must have, the .587 build, but mine is the earlier .562.
What is the best way to proceed?
Can I flash the .587 kernel with flashtool as I've read that the stock, signed kernels can be flashed on locked bls. Is this right, and does flashing a stock .587 kernel affect rooting?
Any help, or links to whatever I haven't found yet, would be much appreciated.
Cheers,
Mick.
Click to expand...
Click to collapse
First, .562 update is crap. Sony released a crappy 4.0.3 update, better update if you can.
Then installing stock firmware before installing a custom ROM is not necessary.
Yes, there is difference in .562 and .587 kernels. Apparently, .562 kernels have a security hole in it, which can be used for rooting, however .587 kernels don't have it anymore and you will have to install older kernel to root and then install newer kernel back.
Yes u can flash .587 kernel using flashtool & this will not effect on root... But I will suggest u to update ur phones firmware to .587 (.562 is full of bugs), root it & install cwm then flash stock based custom roms which supports locked bootloader..
Sent from my MT11i using Tapatalk 2
Samak46 said:
Yes u can flash .587 kernel using flashtool & this will not effect on root... But I will suggest u to update ur phones firmware to .587 (.562 is full of bugs), root it & install cwm then flash stock based custom roms which supports locked bootloader..
Sent from my MT11i using Tapatalk 2
Click to expand...
Click to collapse
It does. 4.1.A.0.562 kernel has a security hole in it, which is used to root via DooMLoRD's method. .587 kernel has that hole patched and that root method does not work.
Thanks for the replies.
Ok, so this means that I can use flashtool to flash the .587 kernel, and then whichever rom afterwards.
I have tried flashing roms with the .562 kernel, and they do work, but I get odd glitches.
The Walkman app in Zelly Cream 2.0 for instance says it has unexpectedly stopped whenever I click on My Music, and the Ultimte HD rom is really good, but the native Movie player won't work and does the same whenever I click on a video.
Each app works ok on one rom, but not on the other.
At the moment I've got the Zelly Cream rom installed and just disabled the Walkman, so had to download another player.
So far I've not had any issues with boot loops or anything, but I have been wiping properly before installing.
I have got a stock .587 kernel I found on here, so I'll try flashing that and see if it's any better.
It's a shame the boot loader is locked, but I've also read that removing the sim lock can fix this.
Thanks again for the info. :good:
587 kernel
Sorry, has anyone got a link for a generic .587 kernel as when I search, the ones that come up have been modified in some way, and my boot loader is locked.
Thanks.
Got it
Ah, it's ok, I think I've found it.
The first one I downloaded was reproting LT15 in Flashtool, so after a bit more searching found it here
http://forum.xda-developers.com/showthread.php?t=1838830
Should be ok.
Just download the whole ROM, but choose only kernel to install.
Sent from LT18i with custom firmware by myself.
Your phone's not covered under warranty anymore, so why don't you try unlocking the bootloader? Would barely take a few minutes.
Hi, Flash new .587 firmwar..... flash .562 kernel only.....root phone.....flash original .587 kernel only.....this video helped me a lot.
http://www.youtube.com/watch?v=Rjv71b9QcZE
Feel free to get in touch...good luck !!

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