Develop Bugs

[Q] How to Backup stock Kernel + ROM ?

Hello Guys !
I wanna try some custom ROM so before doing that want to backup my Kernel & ROM. If anything gone wrong so I can revert back to original ROM.
My Cell details:
Xperia Arc S
LT18i
Android Version 2.3.4
Baseband Version -64
Build number
4.0.2.a.0.62
Locked bootloader
& unrooted.
Please someone guide me....
Thanks in advance...

If your bootloader's locked then you can't back up. You can only reload(repair)it from PC companion.
sinkster©

Thanks sinkster !
Ok done unlocked bootloader.
Then advice the further steps...

XPERIA CWM AUTO INSTALLER
download this app and install CWM recovery on ur phone...
Then reboot ur phone into recovery mode...
TO DO THIS, LONG PRESS BACK BUTTON WHILE THE PHONE RE-BOOTS
(OR)
KEEP TAPPING VOLUME DOWN BUTTON...
After it boots into recovery, go to BACKUP & RESTORE and Select Backup...
This will create a NANDROID BACKUP on your phone exactly as it is...including apps n contacts n all other data..
you can find it in SDCARD/Clockworkmod/Backup/
Good day...

If you wanted to take a backup without installing CWM you can use fastboot to boot (not flash) a kernel that has CWM built in.

thanks amulbaby
I will try and get back here with comment ...
EDIT:
I tried that steps but it will works only on rooted phone ..., can not enter in to recovery mode by pressing any key, it normally boots up and appear home ...

smartarse93 said:
If you wanted to take a backup without installing CWM you can use fastboot to boot (not flash) a kernel that has CWM built in.
Click to expand...
Click to collapse
How to do so... any guide links pls .. .

ShresthasR said:
thanks amulbaby
I will try and get back here with comment ...
EDIT:
I tried that steps but it will works only on rooted phone ..., can not enter in to recovery mode by pressing any key, it normally boots up and appear home ...
Click to expand...
Click to collapse
Why don't you root it with flashtool then?
But for that u wud have to downgrade to .42, with flashtool before rooting

Hey I am also wondering about this. I have lt15i flashed with Official .562, locked bootloader and CWM installed via flashtool.
Which ICS roms will work with official .562 and locked bootloader? I have been searching all morning but not a lot of updates regarding this since the official .562 release.

djsneak1 said:
Hey I am also wondering about this. I have lt15i flashed with Official .562, locked bootloader and CWM installed via flashtool.
Which ICS roms will work with official .562 and locked bootloader? I have been searching all morning but not a lot of updates regarding this since the official .562 release.
Click to expand...
Click to collapse
PROBABLY THIS ..... NOT SURE ....
T.E.A.M. Stock Rom for 2011 Xperia devices

amulbaby said:
Why don't you root it with flashtool then?
But for that u wud have to downgrade to .42, with flashtool before rooting
Click to expand...
Click to collapse
Here is the point I was looking for these alternative . . .
I have STOCK ROM with 4.0.2.a.0.62, actually I want to backup these stuff, I read about that downgrading via flashtool and root, if I flashed via flashtool that STOCK ROM will wipe...
Anyway here what I did to make a copy of my stock firmware & upgraded to ICS firmware & rooted.
Repaired my phone using Sony update service to download and backup STOCK firmware
Flashed with flashtool official firmware LT18i 4.1.A.0.562 NCB Icecream Sandwich Official

First you need to download a kernel that has cwm built in, I would search for recoveryARC.IMG then you also need fastboot from the SDK.
All you would do is connect your phone I'm fastboot then run in a command prompt fastboot boot recoveryARC.IMG. Your phone would then boot using that kernel and you can enter cwm by pressing the vol down several times. This process wouldn't flash your kernel only load it temporarily.
I would try and find a guide about them but I'm on my phone.
Sorry just noticed you've already done it, congrats enjoy ics.
Sent from my LT18i using XDA

smartarse93 said:
First you need to download a kernel that has cwm built in, I would search for recoveryARC.IMG then you also need fastboot from the SDK.
All you would do is connect your phone I'm fastboot then run in a command prompt fastboot boot recoveryARC.IMG. Your phone would then boot using that kernel and you can enter cwm by pressing the vol down several times. This process wouldn't flash your kernel only load it temporarily.
I would try and find a guide about them but I'm on my phone.
Sorry just noticed you've already done it, congrats enjoy ics.
Sent from my LT18i using XDA
Click to expand...
Click to collapse
Thanks bro ...
I already upgraded, anyway I want to know the process, you mentioned here this process wouldn't flash kernel only load it temporarily, I am confused...
Could you describe in details .. ? Actual what happens if we flash recovery img...

Well you can use fastboot to install the kernel which overwrites the previous one, or you can use it boot the kernel which just sends the kernel to the phone which the boots and temporarily uses the kernel. However when the phone next shuts down it will return to normal use.
If you flash a kernel it writes the .IMG to the boot partition. So if I wanted to use a kernel that stayed between reboots I would use 'fastboot flash boot kernelname.IMG'
However if I was running stock I could use recoveryARC.IMG with cwm, and do fastboot boot recoveryARC.IMG then run update.zip as normal. Then all you have to do is reboot, you'll be back to stock but the update would still be installed.
Sorry if it's not cleat, the best I could do on my phone.
Sent from my LT18i using XDA

Please elaborate on backing up STOCK ROM
ShresthasR said:
Here is the point I was looking for these alternative . . .
I have STOCK ROM with 4.0.2.a.0.62, actually I want to backup these stuff, I read about that downgrading via flashtool and root, if I flashed via flashtool that STOCK ROM will wipe...
Anyway here what I did to make a copy of my stock firmware & upgraded to ICS firmware & rooted.
Repaired my phone using Sony update service to download and backup STOCK firmware
Flashed with flashtool official firmware LT18i 4.1.A.0.562 NCB Icecream Sandwich Official
Click to expand...
Click to collapse
Can you please give me details on you did this? It is precisely what I want to do (ie. Backup the stock carrier rom on my Xperia Arc before flashinging an old ROM in order to root it).
Did you use the "repair" option from "Sony PC Companion 2.1>Support Zone>Phone software update>repair phone"?
Or did you use the software from here: http: // w ww(dot)sonymobile(dot)com/gb/tools/update-service/
Can you please tell me the whole procedure on how you did the backup of the STOCK ROM? Thanks!

King of Procrastinators said:
Can you please give me details on you did this? It is precisely what I want to do (ie. Backup the stock carrier rom on my Xperia Arc before flashinging an old ROM in order to root it).
Did you use the "repair" option from "Sony PC Companion 2.1>Support Zone>Phone software update>repair phone"?
Or did you use the software from here: http: // w ww(dot)sonymobile(dot)com/gb/tools/update-service/
Can you please tell me the whole procedure on how you did the backup of the STOCK ROM? Thanks!
Click to expand...
Click to collapse
Actually what I did just followed this guide
http://forum.xda-developers.com/showthread.php?t=1304634
At this thread just follow the video tutorial under section
"How to backup your carrier firmware using Update Service"
Youtube link: http://youtu.be/bB77gWRUI_A
Thanks XperienceD for nice guide

just want to ask, does CWM backup also backups the kernel or firmware?
and how do i restore stock kernel with or without using ODIN?
how do i go on flashing custom firmware? i really do need explanation especially for the .img file that i have been seeing guys.
please help me out because i really want to learn more about software and stuff.
thank you very much and god bless you guys.

ROM backup OK; How to take backup of Kernel
I am using Sony Xperia Ray ST18i
used it for a year with stock kernel and ROM
rooted it long ago, but was afraid of custom ROMs
last month I unlocked bootloader, flashed ROM and custom ROM (beanstalk 4.3.075), enjoying it but obviously not so stable like stock
Now if I wish to move back to my stock kernel and ROM
what steps are required.
I suppose
1. flash the stock kernel
2. restore from backed up ROM (I do have nandroid backup of stock ROM)
but how to achieve the step 1, as I learnt nandroid backup doesn't backs up ROM.
My collegue is having same phone still on stock, Can I use his phone somehow to extract kernel. I searched and found a zip to be used through CWM which backs up kernel it was meant for some samsung phone I tried but failed.
Thanks in advance.
Do I need to supply some more information to get help?

Backup stock ROM
I used this backup guide, but dont know if it will work for you http://helpadude.com/how-to-backup-your-android-rom/
If it does plz give thanks

[Q] Explicit summary on basebands, firmwares, etc...[SOLVED]

Hello guys,
1st of all, I've been looking through forums and "Similar threads we found" but didn't find the one thing I need : a perfect synthesis on ROMs, Kernels, basebands, etc...
I hope you guys can help me !
I'm a recently owner of the LT18i and tried to flash Kernel and ROMs on it, but failed mainly because I was too drunk to follow steps in the meant order.
Config :
LT18i Stock ROM GB 2.4.3
Baseband 64
Build 4.0.2.A.0.62
Here I am today with this choice :
- Try again to install Arconium 7.3 as I originally planned (the one designed for my build).
- Find others ROMs / Kernels to flash.
I'd like to update on an early version of Androïd (most likely ICS) but need a few answers to following questions before I feel confident :
- Is it possible and safe (regarding AND regardless my phone) to change my build from 4.0.2.A.0.62 to 4.1.B.0.431 or anything accepting ICS on Arc S ?
- Does baseband change anything in the process, if yes, how ?
- Is it sufficient just to flash the last kernel and last ROM on my phone to have ICS on my stock GB phone ?
Please note I'm not actually a beginner as I already touched to ROMs, CWM, ..., but I'm like totally lost when I see information widespread on hundreds of different threads of thousands of pages each !
In a nutshell, I just need a few steps synthesis of how I could switch from my current config to an ICS 4.x Arconium Arc S (if it is possible).
Thanks in advance,
Minikrob

Its not hard at all to cwitch from GB to ICS...
stuffs required:
- ICS kernel( Xarc or ArcKnight recommended)
- Custom ROM( Arconium ICS 4.0 recommended as it is based on stock ICS )
- Baseband 72
yes it is 100% safe to taste ICS
Baseband as the name suggest is required for mobile network..latest one normal has btr network coverage with btr battery life
You need to flash a ICS kernel and an ICS ROM as i have mentioned above
steps:
Copy ROM to sd card
Flash a Kernel with flashtools
Flash baseband in fastboot
enter recovery and clean everything(data,cache)
Flash ROM
Reboot
I hope you know how to enter recovery and all

steps:
Copy ROM to sd card
Flash a Kernel with flashtools
Flash baseband in fastboot
enter recovery and clean everything(data,cache)
Flash ROM
Reboot
I hope you know how to enter recovery and all
Click to expand...
Click to collapse
I know how to !
This is great, exactly what I was looking for. I might sound like dumb, but the single thing I didn't even know about is we could flash Basebands.
I've now all necessary tools to taste ICS, as you said !
Thanks a lot !

arpith.fbi said:
Its not hard at all to cwitch from GB to ICS...
stuffs required:
- ICS kernel( Xarc or ArcKnight recommended)
- Custom ROM( Arconium ICS 4.0 recommended as it is based on stock ICS )
- Baseband 72
yes it is 100% safe to taste ICS
Baseband as the name suggest is required for mobile network..latest one normal has btr network coverage with btr battery life
You need to flash a ICS kernel and an ICS ROM as i have mentioned above
steps:
Copy ROM to sd card
Flash a Kernel with flashtools
Flash baseband in fastboot
enter recovery and clean everything(data,cache)
Flash ROM
Reboot
I hope you know how to enter recovery and all
Click to expand...
Click to collapse
I believe it is the other way around, flash baseband in flashtools and kernel in fastboot. I would say your better off either getting the ftf of ics 4.0.4 or flashing via pcc if its available for you. It might be worth seeing if you like the UI before you start getting into custom roms etc.

smartarse93 said:
I believe it is the other way around, flash baseband in flashtools and kernel in fastboot.
Click to expand...
Click to collapse
I'm pretty sure I've to flash my kernel via Flashtool, I did it before, can't say for the baseband, but I'll find a way.
And I already globally looked at ICS, this seems pretty cool to me, it will do it !

minikrob said:
I'm pretty sure I've to flash my kernel via Flashtool, I did it before, can't say for the baseband, but I'll find a way.
And I already globally looked at ICS, this seems pretty cool to me, it will do it !
Click to expand...
Click to collapse
Either in command prompt fastboot flash boot boot.img, or whatever the name of the .img, or with Flashtool -> fastboot mode -> Select kernel to flash. And BBs are flashed via Flashtool as well, just flash mode, not fastboot mode.
Sent from my crAXperia Arc

CWM Recovery interesting Problem Help please....

Hi everyone...
My phone is LT15i. I used to CM9 on my phone.Today I flash the Stock Rom and Kernel via flashtool.And I root my phone with Doom method
I unlock my bootloader.I install X-parts but my phone dont boot Recovery mod.When restarting Sony logo but led no blue.Blue led isnt coming.
And phone open.I want to Custom rom but recovery isnt running Please help me...

If you have BL unlocked, just flash a Kernel with CWM in it.

RamEsRock said:
If you have BL unlocked, just flash a Kernel with CWM in it.
Click to expand...
Click to collapse
I want to use this Romhttp://forum.xda-developers.com/showthread.php?t=1788701.Can you offer me a kernel which available with this custom rom.But the kernel must contain recovery

Which kernel can I install contain cwm? But it must be run with this Romhttp://forum.xda-developers.com/showthread.php?t=1788701

Mazellat said:
Which kernel can I install contain cwm? But it must be run with this Romhttp://forum.xda-developers.com/showthread.php?t=1788701
Click to expand...
Click to collapse
You have many choices here.
My suggestion is :
1. ArcKnight 3.5.1 with Wifi module http://forum.xda-developers.com/showthread.php?t=1597771
2.ICS stock kernel with CMW, just search in the development section u will find it

[Acro S][Kernel] Stock Kernel + CWM + Root (updated latest 6.1.A.2.55)

[Disclaimer] Do it at your own risk. I am not responsible for anything happened to your phone.
Hi all, I've just upgraded my phone to Acro S recently. It is running ICS 4.0.4 build 6.1.A.1.58. It has been updated to 6.1.A.2.55
So here is a modified Stock Kernel with CWM which I created based on Arakmar's Stock ICS kernel (Build 11) for XS
Credits:
1. Arakmar - for the ramdisk and CWM
2. DoomLord and FXP team - for too many things to mention
Link (do not mirror)
6.1.A.2.55 - http://www.mediafire.com/?zuzatcl3it3zce7
6.1.A.2.50 - http://www.mediafire.com/?jrjiwg13w3gvxpf
6.1.A.2.45 - http://www.mediafire.com/?rq43glb93khd9ia
6.1.A.1.58 - http://www.mediafire.com/?wsuha53wvcc3cav
Instructions:
1. Unzip the files to the fastboot folder, there are 2 files:
kernel.sin -- Stock ICS Kernel
kernel-cwm.elf -- Stock ICS Kernel with init.d support and CWM 5.5.0.4
2. Get into fastboot mode, type:
- To flash the CWM kernel
Code:
fastboot flash boot kernel-cwm.elf
- To flash back the Stock kernel
Code:
fastboot flash boot kernel.sin
To get into CWM - Reboot your phone, tap the screen (not buttons) a few times when the blue led and button lights appear
To root your phone, follow instructions here: http://forum.xda-developers.com/showpost.php?p=30320507&postcount=11
If you like it, please hit the [Thanks] button or you can buy me a beer

Thank you.
But i have a question: what is ram disk use for?
I used xperia s mod kernel to flash supersu.apk, then flash back stock arco s kernel, and add CMW. But some .zip file can not use.

Does this give us root or do i need to root the phone first and then flash this kernel ?
Also, do we need to unlock bootloader for this ?

Can anyone please comment on performance? Thanks in advance!!

Hi do i need to flash these 2 files or just one i want cwm.and does it include root or not?

mercury_beta said:
Thank you.
But i have a question: what is ram disk use for?
I used xperia s mod kernel to flash supersu.apk, then flash back stock arco s kernel, and add CMW. But some .zip file can not use.
Click to expand...
Click to collapse
ramdisk is part of kernel. it runs initial scripts that control how the phone starts.
dusanzk said:
Does this give us root or do i need to root the phone first and then flash this kernel ?
Also, do we need to unlock bootloader for this ?
Click to expand...
Click to collapse
You need to unlock bootloader first. This kernel won't give you root. But you can boot into cwm to flash any package that root your phone or you can flash a complete rom, if available.
john9 said:
Can anyone please comment on performance? Thanks in advance!!
Click to expand...
Click to collapse
There is no difference in performance as stock kernel
noriya said:
Hi do i need to flash these 2 files or just one i want cwm.and does it include root or not?
Click to expand...
Click to collapse
You need to flash only the one with cwm. It won't root your phone.

Thanks for your reply,is it ok to flash cwm without root first?and unlock bootloader is the same xperia s right?

cobrato said:
[Disclaimer] ]
Hi all, I've just upgraded my phone to Acro S recently. It is running ICS 4.0.4 build 6.1.A.1.58
)
Click to expand...
Click to collapse
Could you make a pre-root one?

I am sorry.
Although I checked, and kernel.sin of original and kernel.sin of cobrato are the same, is it right now?

puriketsuangel said:
I am sorry.
Although I checked, and kernel.sin of original and kernel.sin of cobrato are the same, is it right now?
Click to expand...
Click to collapse
I think you're right. The moded kernel is kernel-cwm.elf.

Root Package
Here is the Root package after you flash the kernel with cwm
To root your phone:
1. copy the RootPhone.zip file to sdcard (internal storage)
2. reboot into cwm
3. install the package
4. reboot
Link:
http://www.mediafire.com/?11rhxm1k490edxz

papacarla said:
I think you're right. The moded kernel is kernel-cwm.elf.
Click to expand...
Click to collapse
Sorry.
Ｔhanks　alot.

It works on Acro HD with Acro S's ICS ROM flashed exlude baseband.
UPD: I did not like the ICS. There are only 320 mb of free RAM. I have 460 mb of free RAM on 2.3.7. So, I installed back the 2.3.7

if you could add 2way call recording patch to this kernel would be great

cobrato said:
Here is the Root package after you flash the kernel with cwm
To root your phone:
1. copy the RootPhone.zip file to sdcard (internal storage)
2. reboot into cwm
3. install the package
4. reboot
Link:
http://www.mediafire.com/?11rhxm1k490edxz
Click to expand...
Click to collapse
This worked for me, unlocked bootloader, flashed kernel-cwm and then flashed rootphone in CWM. Thanks.
Just a suggestion,
You might wanna add "+ Root" to your title seeing as this is another way to root the device.

With CWM, can we then flash custom ROMs for Xperia S or a Kernel with permanent root (e.g. DoomKernel)?
I'd like to get rid of all the Facebook-crap in the stock ROM but if it will be there again after the next update from Sony it's no use.

skycamefalling said:
With CWM, can we then flash custom ROMs for Xperia S or a Kernel with permanent root (e.g. DoomKernel)?
I'd like to get rid of all the Facebook-crap in the stock ROM but if it will be there again after the next update from Sony it's no use.
Click to expand...
Click to collapse
Once you unlock bootloader, you can flash any custom kernel.
If the kernel comes with CWM, you can flash any rom/zip with root
But I think current S custom kernels/roms are based on older version: 6.1.A.0.452

Bootloader unlock will probably void warranty.
But how about rooting? No righht?

Where to find the tools for unlocking bootloader.
Would appreciate a link if anybody now...

SweKen said:
Where to find the tools for unlocking bootloader.
Would appreciate a link if anybody now...
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1527159
It's the same method for Xperia P/U/S/Acro S.

[Q] Help and idiot out? ARC S Flashing

Hello,
I would like to do the following to my Arc S.
Flash new recovery
Flash new kernel (fusion)
Flash SJB latest version (7 i think)
I have been going arround the forums for 2 days now trying to figure it out but have been unable to do so.
The steps i need help with are as follows:
Where do i get recovery image for my ARC S?
i understand that using fastboot to flash it onto phone is rather easy.
As i understand after i get new recovery i can flash kernel and new rom from recovery mode?
How do i revert to android 2.3.4 4.0.2.A.0.62 if i dont like new rom / kernel?
GREAT BIG THANKS!

AshrakTheWhite said:
Hello,
I would like to do the following to my Arc S.
Flash new recovery
Flash new kernel (fusion)
Flash SJB latest version (7 i think)
I have been going arround the forums for 2 days now trying to figure it out but have been unable to do so.
The steps i need help with are as follows:
Where do i get recovery image for my ARC S?
i understand that using fastboot to flash it onto phone is rather easy.
As i understand after i get new recovery i can flash kernel and new rom from recovery mode?
How do i revert to android 2.3.4 4.0.2.A.0.62 if i dont like new rom / kernel?
GREAT BIG THANKS!
Click to expand...
Click to collapse
First of all you have to unlock the bootloader and you have to be on ICS
Then you can flash the kernel[with flashtool].
after flashing the kernel u can enter the recovery by presing the volume down buton until it brings you to cwm.
and the follow the instruction for instaling the rom
Good luck

theanelfro said:
First of all you have to unlock the bootloader and you have to be on ICS
Then you can flash the kernel[with flashtool].
after flashing the kernel u can enter the recovery by presing the volume down buton until it brings you to cwm.
and the follow the instruction for instaling the rom
Good luck
Click to expand...
Click to collapse
Thanks for answer.
If my bootloader is "unlock available: yes" is that ok?
Will the fusion kernel 5.4 work with default rom's ? like GB 2.3?
how do i revert to stock kernel after flashing fusion? Emma?
Is recovery stored on a seperate partition that is not the rom / system partition? so i will always have recovery available?
Thank you!

AshrakTheWhite said:
Thanks for answer.
If my bootloader is "unlock available: yes" is that ok?
Will the fusion kernel 5.4 work with default rom's ? like GB 2.3?
how do i revert to stock kernel after flashing fusion? Emma?
Is recovery stored on a seperate partition that is not the rom / system partition? so i will always have recovery available?
Thank you!
Click to expand...
Click to collapse
Yes it is, but you must unlock it.[search in the forum]
fusion is for jelly bean roms, not for GB so far i know,.
if you want to revert to from ICS to GB you just have to flash the ftf.file from gb .62
if you have any problem tell me i will try to help you.
press thanks if i helped you!
Here is step by step how to unlock it

AshrakTheWhite said:
Thanks for answer.
If my bootloader is "unlock available: yes" is that ok?
Will the fusion kernel 5.4 work with default rom's ? like GB 2.3?
how do i revert to stock kernel after flashing fusion? Emma?
Is recovery stored on a seperate partition that is not the rom / system partition? so i will always have recovery available?
Thank you!
Click to expand...
Click to collapse
Bootloader can be unlocked
No. Fusion works with only custom JB ROM. For stock ROM use stock kernel.
You can use EMMA or Flashtool to flash an FTF file. Note that this will wipe your personal data.
No. The recovery that you're using now can either be stored on /system partition or merged with kernel. The one stored in /system requires root before you can install it.
僕のLT18iから送られてきた

Hey i got it done! i love sjb 7 its sick fast!
I first unlocked bootloader, after which the phone would no longer go past SE logo ( i had installed CWM for default rom and bootlocker blew up the kernel probobly)
after which i flashed Fusion 5.4 with fastboot
and then i applied SJB from SD card.
I did not think it would be that easy. it was.
Thanks to all and everyone who posted here got a Thanks

AshrakTheWhite said:
Hey i got it done! i love sjb 7 its sick fast!
I first unlocked bootloader, after which the phone would no longer go past SE logo ( i had installed CWM for default rom and bootlocker blew up the kernel probobly)
after which i flashed Fusion 5.4 with fastboot
and then i applied SJB from SD card.
I did not think it would be that easy. it was.
Thanks to all and everyone who posted here got a Thanks
Click to expand...
Click to collapse
congz