Develop Bugs

How can I root and flash a custom ROM?

My bootloader status says I can unlock it but my phone is on version 4.0.2.A.0.62 can someone give me a full guide on what I need to do please?
Thanks

cined said:
My bootloader status says I can unlock it but my phone is on version 4.0.2.A.0.62 can someone give me a full guide on what I need to do please?
Thanks
Click to expand...
Click to collapse
Unlock with normal method or testpoint (drm data keept)
Get root/cwm
Find your rom and fitting kernel
Flash.
If you just go first to general selection theres a lot fully made threads about unlocking and getting CWM. (on top, the pinned ones)
Then go to dev. selection so find your rom and follow the guide to flash
From my sexy LT15i

TheHaso said:
Unlock with normal method or testpoint (drm data keept)
Get root/cwm
Find your rom and fitting kernel
Flash.
If you just go first to general selection theres a lot fully made threads about unlocking and getting CWM. (on top, the pinned ones)
Then go to dev. selection so find your rom and follow the guide to flash
From my sexy LT15i
Click to expand...
Click to collapse
I'm struggling to find any guides. I only want to flash so I can get a ROM that has auto brightness turned off as on the stock ROM it's really annoying. Do I NEED to unlock my bootloader first?

Please could you break it down for me?
I'm so confused

You guys can't search? It's on stickies :/
Unlock bootloader:
http://forum.xda-developers.com/showthread.php?t=1551494
.42 downgrade .ftf img and then use zergrush exploit or pre-rooted ones
http://forum.xda-developers.com/showthread.php?t=1330314
Flash Custom Kernels and Roms:
http://forum.xda-developers.com/showthread.php?t=1508585

Here is a link where everything is explained:
http://www.theandroidsoul.com/how-to-root-xperia-arc/
If someone could verify that everything is correct, I'm French and I watch French tutorial
(Like this one: http://www.forummobiles.com/topic/241960-xperia-arc-arc-s-debrand-root-et-flash-de-baseband/)
EDIT : Retrosid is faster than me

no need to root dude if u want to install a custom ROM...just unlock the bootloader..flash a custom kernel and then flash the ROM..thats all..ROM will be pre-rooted..

In my phone settings it says my phone is LT18i does this matter for anything?

no tats just model number for arc s...
follow the method..
unlock
flash custom kernel
flash ROM
u r done!

cined said:
In my phone settings it says my phone is LT18i does this matter for anything?
Click to expand...
Click to collapse
You can change it back by editing build.prop if I remember well. It's nothing
Sent from my Xperia Arc

Retrosid said:
You can change it back by editing build.prop if I remember well. It's nothing
Sent from my Xperia Arc
Click to expand...
Click to collapse
I was just looking how to ... thank you!

arpith.fbi said:
no tats just model number for arc s...
follow the method..
unlock
flash custom kernel
flash ROM
u r done!
Click to expand...
Click to collapse
So I don't need to downgrade anything??
In those steps where do I flash CWM?

nope not required..this is the best short cut and time saving + safe...try it and let us know..
CWM is in custom kernel..u dont need to flash it seperately...

Just flash a kernel & you can use CWM to flash a rom

Thanks,
Do I just follow the steps in this link
http://unlockbootloader.sonymobile.com/
To unlock the bootloader?

yea..follow that..
All the best

I have now unlocked the bootloader
I now want to flash a custom ICS ROM, I now need to find a kernal to flash?
Thanks

yea...either stock ICS kernel or doom kernel for ICS beta..

arpith.fbi said:
yea...either stock ICS kernel or doom kernel for ICS beta..
Click to expand...
Click to collapse
Which ICS ROM Would you suggest? I just downloaded the Doom Kernel + Modules.
Thanks

I'm trying to flash the doomKernels boot.img in fastboot, I have put the ARC-DooMKernel-ICS-BETA-v04-lower-boot.img file in the platform-tools folder, I'm using the command fastboot flash boot ARC-DooMKernel-ICS-BETA-v04-lower-boot and it's saying it cannot load.
Any help please?
actually it says
'[ requirements ]
stock SE ICS Beta FW* (i havent tested on other ROMs so i cannot guarantee that it will work on them!)'
so I need to install stock firmware first?

[Q] How to back up app data & settings without root and Ultimate Backup Tool?

Hi, everyone. I can't seem to find the solution for my prob, so I've to ask for ur knowledge on this.
Problem:
I'm using Xperia Arc with latest stock firmware without root. And I want to back up my app data & settings before resetting or flashing it.
Attempt:
I've tried Ultimate Backup Tool, but to no avail, just as mentioned in the Ultimate Backup Tool thread that there are known problem with Xperia Arc as one of the Sony 2011 devices.
I've looked through all the rooting methods for Xperia Arc, and I can't seem to find or perform a working root on the phone without flashing it. Naturally, Titanium Backup can't work as well.
Question:
So, what options do I have to back up the app data & settings now? And I'm looking that whether will a flash necessarily wipe the data on ur phone? Can I retain the data even after flashing the phone?
Really appreciate for ur help. Thx~ =)

SCC2002 said:
Hi, everyone. I can't seem to find the solution for my prob, so I've to ask for ur knowledge on this.
Problem:
I'm using Xperia Arc with latest stock firmware without root. And I want to back up my app data & settings before resetting or flashing it.
Attempt:
I've tried Ultimate Backup Tool, but to no avail, just as mentioned in the Ultimate Backup Tool thread that there are known problem with Xperia Arc as one of the Sony 2011 devices.
I've looked through all the rooting methods for Xperia Arc, and I can't seem to find or perform a working root on the phone without flashing it. Naturally, Titanium Backup can't work as well.
Question:
So, what options do I have to back up the app data & settings now? And I'm looking that whether will a flash necessarily wipe the data on ur phone? Can I retain the data even after flashing the phone?
Really appreciate for ur help. Thx~ =)
Click to expand...
Click to collapse
You can't, it's not possible to access and backup app data while your phone is not rooted. Are you on GB or ICS?
BTW, you don't have to flash your phone to root unless you have to downgrade. In the instance for ICS .587, I only need to flash the kernel of .562, root it via adb, then flash back the .587 kernel. This should not wipe your data.
http://forum.xda-developers.com/showthread.php?t=1061338
僕のLT18iから送られてきた

popthosegaskets said:
You can't, it's not possible to access and backup app data while your phone is not rooted. Are you on GB or ICS?
BTW, you don't have to flash your phone to root unless you have to downgrade. In the instance for ICS .587, I only need to flash the kernel of .562, root it via adb, then flash back the .587 kernel. This should not wipe your data.
http://forum.xda-developers.com/showthread.php?t=1061338
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Thx a lot for ur reply. I'm on ICS .587 too. I was just afraid that flashing would wipe the data. And now this is clear.
Seems like this is the only option that I have, right? Btw, won't flashing it back to the latest firmware lose the root? Bcuz I used to have root, but I lost it when I updated my phone through official update methods. Or is that why I lost root?

SCC2002 said:
Thx a lot for ur reply. I'm on ICS .587 too. I was just afraid that flashing would wipe the data. And now this is clear.
Seems like this is the only option that I have, right? Btw, won't flashing it back to the latest firmware lose the root? Bcuz I used to have root, but I lost it when I updated my phone through official update methods. Or is that why I lost root?
Click to expand...
Click to collapse
You lose root from both flashing stock firmware and updating through official updating methods.... at least for locked boot loaders

SCC2002 said:
Thx a lot for ur reply. I'm on ICS .587 too. I was just afraid that flashing would wipe the data. And now this is clear.
Seems like this is the only option that I have, right? Btw, won't flashing it back to the latest firmware lose the root? Bcuz I used to have root, but I lost it when I updated my phone through official update methods. Or is that why I lost root?
Click to expand...
Click to collapse
Yes, flashing will lose your root, so does updating it via the official method. Flashing the entire ROM would wipe the data, but flashing the kernel does not.
僕のLT18iから送られてきた

jman2131 said:
You lose root from both flashing stock firmware and updating through official updating methods.... at least for locked boot loaders
Click to expand...
Click to collapse
popthosegaskets said:
Yes, flashing will lose your root, so does updating it via the official method. Flashing the entire ROM would wipe the data, but flashing the kernel does not.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Really? Then, what's the point of downgrade the firmware then upgrade again? Lol~
So, does that mean that with unlocked bootloader, I can keep root even after upgraded?

SCC2002 said:
Really? Then, what's the point of downgrade the firmware then upgrade again? Lol~
So, does that mean that with unlocked bootloader, I can keep root even after upgraded?
Click to expand...
Click to collapse
You can't root the latest firmware so you have to downgrade to root. You then upgrade by flashing the latest firmware's kernel which upgrades the firmware to the latest version and also keeps root status.
As for unlocked bootloaders, I can't comment because I have no experience with them
Sent from the work tab using Tapatalk

jman2131 said:
You can't root the latest firmware so you have to downgrade to root. You then upgrade by flashing the latest firmware's kernel which upgrades the firmware to the latest version and also keeps root status.
As for unlocked bootloaders, I can't comment because I have no experience with them
Sent from the work tab using Tapatalk
Click to expand...
Click to collapse
I think I got u wrongly before this. Lol. Bcuz you said that flashing it to the latest firmware will lose root. Or do you mean just stock firmware?
While for unlocked bootloader, can popthosegaskets or anyone else share the insight? Thx.

yep i meant flashing any stock ftf will make you lose root on locked bootloader

jman2131 said:
yep i meant flashing any stock ftf will make you lose root on locked bootloader
Click to expand...
Click to collapse
So that means that if I want to upgrade to a later firmware without losing root, I've to use a custom firmware?

SCC2002 said:
So that means that if I want to upgrade to a later firmware without losing root, I've to use a custom firmware?
Click to expand...
Click to collapse
Nope. You flash the kernel of the latest version of stock firmware. Here's an example
Sent from Xperia Arc S

ごめん~ごめん~
Sorry for the late reply
Anyways, I tried flashing the .587 kernel on my .562 stock. My firmware version still read .562, so I don't think flashing kernel will update firmware on unlocked bootloader.
As for rooting the latest firmware, you can update first, downgrade the kernel and root. You can keep data this way and get root.
僕のLT18iから送られてきた

popthosegaskets said:
ごめん~ごめん~
Sorry for the late reply
Anyways, I tried flashing the .587 kernel on my .562 stock. My firmware version still read .562, so I don't think flashing kernel will update firmware on unlocked bootloader.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
it works for locked...at least for me lol

jman2131 said:
it works for locked...at least for me lol
Click to expand...
Click to collapse
Yeah, when you unlock bootloader, you also remove DRM keys that connect to Sony servers. So Track ID, Playnow and other Sony services won't work anymore. You also cannot use OTA updates as it will brick your phone.
僕のLT18iから送られてきた

jman2131 said:
Nope. You flash the kernel of the latest version of stock firmware. Here's an example
Sent from Xperia Arc S
Click to expand...
Click to collapse
But the one that u provided is Arc S kernel, mine is Arc. Not sure whether are they compatible...
popthosegaskets said:
ごめん~ごめん~
Sorry for the late reply
Anyways, I tried flashing the .587 kernel on my .562 stock. My firmware version still read .562, so I don't think flashing kernel will update firmware on unlocked bootloader.
As for rooting the latest firmware, you can update first, downgrade the kernel and root. You can keep data this way and get root.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Oh, it's alright~ Are u a Japanese? Lol. =P I see I see. Didn't know that firmware & kernel are different. Will try & see. Thx a lot~ ^^
jman2131 said:
it works for locked...at least for me lol
Click to expand...
Click to collapse
Alright~ Will try. Thx a bunch. ^^
popthosegaskets said:
Yeah, when you unlock bootloader, you also remove DRM keys that connect to Sony servers. So Track ID, Playnow and other Sony services won't work anymore. You also cannot use OTA updates as it will brick your phone.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Hmm~ I'm aware of that. But from first impression, it seems like they're not that important, since apps like Playnow are not useful. The only one that I use is TrackID, which I saw Sony published it on Play Store for public download. Sounds like it's fine to lose the DRM key too. Lol.

Arc S kernel and Arc kernel is different. Don't flash or it may cause problems.
I am Japanese but studying abroad.
僕のLT18iから送られてきた

popthosegaskets said:
Arc S kernel and Arc kernel is different. Don't flash or it may cause problems.
I am Japanese but studying abroad.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Wow, cool.

Is there any guide for me to flash the kernel? Is flashing custom kernel the same?

SCC2002 said:
Is there any guide for me to flash the kernel? Is flashing custom kernel the same?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1683957
Just follow the instructions and you should get root for latest firmware.
僕のLT18iから送られてきた
---------- Post added at 11:55 PM ---------- Previous post was at 11:52 PM ----------
SCC2002 said:
Is there any guide for me to flash the kernel? Is flashing custom kernel the same?
Click to expand...
Click to collapse
For flashing custom kernel, you need to unlock bootloader.
僕のLT18iから送られてきた

[Q] Bootloader unlock allowed changed to No, after flashing Stock ICS.

Yesterday I tried to flash a JB room into my xperia arc S. The installation had no problems, but after restarting, the phone didn't pass from the sony logo.
So, with the flashtool I flash the stock ICS again. And the phone is working again, but, now I can not flash any other room because the bootloader is lock.
Now, the phone says: "bootloader unlock allowed: no", and before, it had: "bootloader unlock: yes".
Before, I even had clockworkmod installed and I could flash anything with it, but now... Now, my phone does have the notification drawer anymore.
Does anyone knows how can I fix this?
Thanks for any help.

What ftf file did you flash? Did you exclude simlock.ta from the files?
僕のLT18iから送られてきた

popthosegaskets said:
What ftf file did you flash? Did you exclude simlock.ta from the files?
僕のLT18iから送られてきた
Click to expand...
Click to collapse
I flashed( using clockworkmod ) this one first: http://forum.xda-developers.com/showthread.php?t=2380652, and the phone got stuck at the Sony Logo.
Then, using Flashtool, flashed this: "Lt18i_4.1.B.0.587_1254-8596_Generic_India.ftf" , then I even tried this: "LT18i_4.1.B.0.587_(1254-2184).ftf"
simlock.ta? No.
The problem now is that I can not go into clockworkmod anymore. I even had made a backup with clockworkmod , but now I can't restore it anymore.

alexmbra said:
I flashed( using clockworkmod ) this one first: http://forum.xda-developers.com/showthread.php?t=2380652, and the phone got stuck at the Sony Logo.
Then, using Flashtool, flashed this: "Lt18i_4.1.B.0.587_1254-8596_Generic_India.ftf" , then I even tried this: "LT18i_4.1.B.0.587_(1254-2184).ftf"
simlock.ta? No.
The problem now is that I can not go into clockworkmod anymore. I even had made a backup with clockworkmod , but now I can't restore it anymore.
Click to expand...
Click to collapse
Of course you cannot go into clockworkmod, flashing the ftf file will remove it from your phone. You need to flash a stock kernel with CWM or install X-Parts

popthosegaskets said:
Of course you cannot go into clockworkmod, flashing the ftf file will remove it from your phone. You need to flash a stock kernel with CWM or install X-Parts
Click to expand...
Click to collapse
But what is the point now, since it is blocked again?

alexmbra said:
But what is the point now, since it is blocked again?
Click to expand...
Click to collapse
You can always install X-Parts, it does not require unlocked bootloader.
僕のLT18iから送られてきた

popthosegaskets said:
You can always install X-Parts, it does not require unlocked bootloader.
僕のLT18iから送られてきた
Click to expand...
Click to collapse
Yes, but if the phone's bootloader is bloqued again, why install X-Parts to have clockworkmod , if I can not flash another rom?

You can still flash a ROM with X-Parts, just that it will be stock based, definitely not CM/AOKP/PAC.
僕のLT18iから送られてきた

(C6506) 4.4.2 - 10.5.A.0.230 - Generic US - Flashable ZIP and Stripped FTF (root)

Part 1: http://d-h.st/nqC
Part 2: http://d-h.st/ylJ
Enjoy

Thanks for posting. Just to be clear: not rooted, right?

Bobomo said:
Thanks for posting. Just to be clear: not rooted, right?
Click to expand...
Click to collapse
This is the rooted version. I used the original FTF from @scifan here.....
http://forum.xda-developers.com/showthread.php?t=2759110
... to create this stock image with root and recovery included.

Oh, awesome! You should probably add that to the title
Does this have the same issue as the .101 where the XZDR.prop file needs to be replaced in order to access recovery?

Bobomo said:
Oh, awesome! You should probably add that to the title
Does this have the same issue as the .101 where the XZDR.prop file needs to be replaced in order to access recovery?
Click to expand...
Click to collapse
lol, It might, I deleted the files in that directory right before turning off my phone to access recovery and flash the new zip. Both recovery's are working great with 4.4.2

Downloading now!
Crash338 said:
lol, It might, I deleted the files in that directory right before turning off my phone to access recovery and flash the new zip. Both recovery's are working great with 4.4.2
Click to expand...
Click to collapse
First of ... thanks Crash! You were really fast! I'm downloading right now
What directory do we need to delete the files from? I was not aware of the issue, though now I know why I couldn't access recovery on 101 :silly:

adolfovm said:
First of ... thanks Crash! You were really fast! I'm downloading right now
What directory do we need to delete the files from? I was not aware of the issue, though now I know why I couldn't access recovery on 101 :silly:
Click to expand...
Click to collapse
In your SDCard, simply delete the files in the XZDualRecovery or rename the XZDR.prop. If you delete them, they get recreated anyway and fixes that problem you had with 101

Oh, how much I love you right now. Thanks a lot! Will report if I encounter any issue with your files, though I seriously doubt I will.

I'm on unlocked boot loader. Can I just flash the zip and then the ftf file? Thanks
Sent from my Xperia ZL using XDA Premium 4 mobile app

So I just flash these with the Twerp ?
Sent from my C6506 using xda app-developers app

BL or BU
Crash338 said:
Part 1: http://d-h.st/nqC
Part 2: http://d-h.st/ylJ
Enjoy
Click to expand...
Click to collapse
This FTF works to UB and LB or just for UB. Any bugs, something special wich we need to know after flashing?

Optilicious said:
I'm on unlocked boot loader. Can I just flash the zip and then the ftf file? Thanks
Sent from my Xperia ZL using XDA Premium 4 mobile app
Click to expand...
Click to collapse
Locked or unlocked BL isn't important with these files.
Just upload the ZIP to your SDCard and flash it in recovery, then power off your phone without rebooting and flash the stripped FTF with Flashtool and you're done.

Thank you guys!
But for those (like my self) who are not experts on this, could you please, provide a detailed (step by step) guide on how to flash it?
If I already flashed it to kitkat (not rooted), can I do it over this one?
Regards

Torres77an said:
So I just flash these with the Twerp ?
Sent from my C6506 using xda app-developers app
Click to expand...
Click to collapse
Just upload the ZIP to your SDCard and flash it in recovery, then power off your phone without rebooting and flash the stripped FTF with Flashtool and you're done.
I flashed it with CWM but TWRP should also work without issues.

Prome7eo said:
This FTF works to UB and LB or just for UB. Any bugs, something special wich we need to know after flashing?
Click to expand...
Click to collapse
My BL is locked, there are easier ways if you have an unlocked bootloader but this will work whether your BL is locked or unlocked. Ive been running it for a few hours now and no issues, root and dual recovery's are working.

kobolt99 said:
Thank you guys!
But for those (like my self) who are not experts on this, could you please, provide a detailed (step by step) guide on how to flash it?
If I already flashed it to kitkat (not rooted), can I do it over this one?
Regards
Click to expand...
Click to collapse
If you already flashed 4.4.2 then you do not have root and therefore cannot flash these. You will need to flash back to an older 4.2.2 so you can root and then install recovery. Once you have recovery the steps are:
1 - upload the zip to your SDCard and flash it via recovery
2 - After flash is successful, turn off your phone without rebooting.
3 - Flash the stripped FTF file via FlashTool and boot your phone.
That's it

Crash338 said:
Locked or unlocked BL isn't important with these files.
Just upload the ZIP to your SDCard and flash it in recovery, then power off your phone without rebooting and flash the stripped FTF with Flashtool and you're done.
Click to expand...
Click to collapse
Awesome, just wanted to make sure! Thanks!
Sent from my Xperia ZL using XDA Premium 4 mobile app

Crash338 said:
If you already flashed 4.4.2 then you do not have root and therefore cannot flash these. You will need to flash back to an older 4.2.2 so you can root and then install recovery. Once you have recovery the steps are:
1 - upload the zip to your SDCard and flash it via recovery
2 - After flash is successful, turn off your phone without rebooting.
3 - Flash the stripped FTF file via FlashTool and boot your phone.
That's it
Click to expand...
Click to collapse
I made this post with links:
http://forum.xda-developers.com/showpost.php?p=52606650&postcount=5
Just replace the files in the last steps with the file from this thread.
EDIT: Meant this for person Crash was responding to. I know Crash knows how to do this

Downloaded but before flashing it I tried to reinstall dualrecovery 2.7.94 but phone got stuck at sony logo... Will fix this first then flash the update...

Bobomo said:
I made this post with links:
http://forum.xda-developers.com/showpost.php?p=52606650&postcount=5
Just replace the files in the last steps with the file from this thread.
EDIT: Meant this for person Crash was responding to. I know Crash knows how to do this
Click to expand...
Click to collapse
Nice how to thread! :highfive:

Cant flash "Newer" kernels

I flashed 4.1.A.0.562 and it went well after i rooted and was gonna flash to 4.1.B.0.587 it seems to go well i dont get any error on flashtool BUT when i go into setting and check Kernel it says im still on 4.1.A.0.562 and i have unlocked bootloader and im stuck now please help :^)

Just flash ICS Kernel..
Sent from my ST18i using XDA Free mobile app

TheRavenblue said:
I flashed 4.1.A.0.562 and it went well after i rooted and was gonna flash to 4.1.B.0.587 it seems to go well i dont get any error on flashtool BUT when i go into setting and check Kernel it says im still on 4.1.A.0.562 and i have unlocked bootloader and im stuck now please help :^)
Click to expand...
Click to collapse
flash stock ics ftf via this guide. also may dl latest version of ics there. it will flash alls stuff including kernel
http://talk.sonymobile.com/t5/Andro...y-Bean-ICS-Ice-Cream-Sandwich-and/td-p/154389

bejunk said:
flash stock ics ftf via this guide. also may dl latest version of ics there. it will flash alls stuff including kernel
Click to expand...
Click to collapse
Will i lose my root if i do that?

TheRavenblue said:
Will i lose my root if i do that?
Click to expand...
Click to collapse
yes. (& personal data also, so make backup) but root is a easy job (1min) you can root phone with ''e-root'' app. btw if u plan to use custom rom , then no need to root it all custom rom/kernel is prerooted....
if not you can extract kernel & try flashing i manually..

bejunk said:
yes. (& personal data also, so make backup) but root is a easy job (1min) you can root phone with ''e-root'' app. btw if u plan to use custom rom , then no need to root it all custom rom/kernel is prerooted....
if not you can extract kernel & try flashing i manually..
Click to expand...
Click to collapse
I tried using e-root once and i got rooted but after a while i couldnt root :/ it was succesfull (i think) but superuser never showed up.

TheRavenblue said:
I tried using e-root once and i got rooted but after a while i couldnt root :/ it was succesfull (i think) but superuser never showed up.
Click to expand...
Click to collapse
i think you need to install superuser manually afet rooting with e root. (from playstore)