[Q] Unroot - Galaxy S II Q&A, Help & Troubleshooting

I watched the noob video, and called my mom but I couldn't get any help.
Of course I searched too, but I couldn't find the specific answer to what I was looking for.
I have my SGS2 rooted and have the litening rom. I'd like to get back to stock. I've read to go back, I just have to flash the stock firmware using Odin. My question is do I have to flash to the stock kernel as well? I'm a little lost on the kernel bit, what do I do with it if anything?
I'm following this thread:
http://forum.xda-developers.com/showthread.php?t=1075278
I want to unroot, so after flashing the stock rom, I flash stock kernel as well without worrying about insecure kernel and all that jazz?
Thank you.

Chirashi said:
I watched the noob video, and called my mom but I couldn't get any help.
Of course I searched too, but I couldn't find the specific answer to what I was looking for.
I have my SGS2 rooted and have the litening rom. I'd like to get back to stock. I've read to go back, I just have to flash the stock firmware using Odin. My question is do I have to flash to the stock kernel as well? I'm a little lost on the kernel bit, what do I do with it if anything?
I'm following this thread:
http://forum.xda-developers.com/showthread.php?t=1075278
I want to unroot, so after flashing the stock rom, I flash stock kernel as well without worrying about insecure kernel and all that jazz?
Thank you.
Click to expand...
Click to collapse
Flash the stock rom you need with Odin, after reboot do a hard reset (*2767*3855#), make a backup of your apps and files first. You don`t need to flash a kernel after flashing the rom. Done

Thanks!

Related

[Q] Restoring Stock Kernal

Hey, I am an armature on flashing Kernals, and by that I mean I never did it before. I know how to flash a ROM and I am good at that.
I want to the flash Bionix1.3 with KingKlicks kernal. I know how to flash it, but reverting back is going to be a problem for me.
I found the stock kernel, from here. http://forum.xda-developers.com/showthread.php?t=733792
My question is, when going back to stock, do I flash this through Odin? Do I flash it while using Bionix? Or do I flash stock, then use odin?
Yes I searched, and searched. No threads really ask this.
and thank you whom ever posts.
Oh, and one more question, which is better? KingKlicks or Vodoo OC?
SamVib said:
Hey, I am an armature on flashing Kernals, and by that I mean I never did it before. I know how to flash a ROM and I am good at that.
I want to the flash Bionix1.3 with KingKlicks kernal. I know how to flash it, but reverting back is going to be a problem for me.
I found the stock kernel, from here. http://forum.xda-developers.com/showthread.php?t=733792
My question is, when going back to stock, do I flash this through Odin? Do I flash it while using Bionix? Or do I flash stock, then use odin?
Yes I searched, and searched. No threads really ask this.
and thank you whom ever posts.
Oh, and one more question, which is better? KingKlicks or Vodoo OC?
Click to expand...
Click to collapse
kopykatkiller had a Clockwork Kernel installed. He was able to use Odin to flash back to a *stock* kernel.
Click to expand...
Click to collapse
^Hope that helped, it was posted by the OP on that thread..
KingKlicks vs Voodoo = That's your preference, I use Jacs..
Okay, do I do that while on Bionix, or flash stock rom via clockwork, then use odin to replace the kernel?
Really need help guys. Normally I don't double post, but I would like to get a answer ASAP. I am not someone who makes 10 topics on each sub forum...
kingclick vs. voodoo is by preference..
as to installing stock kernel.. what you need to look for is a kernel that's able to flash thru clockworkmod.. or you can just flash bionix1.3 without the kingclick or voodoo... are you having problem with the kernel that you have right now? my rule is if it's not broken, dont fix it..
Okay thanks.. I am installing Kingklick right now.. If I go back I will flash Bionix w/ regular kernel then.
Question....as well
I really want to try out a couple different custom roms, but I'm not sure if just using clockwork/nandroid is all you need to revert back to rooted stock completely. What I mean by that is, will my phone be recovered to what it was before flashing using clockwork/nandroid restore system, will it actually flash it back? Or is it just made for recovering when screwing up stock itself?
I'm a little confused, please help!

[Q] With regards to the broodcomb thread...

First of all, this is the thread I'm referring to
http://forum.xda-developers.com/showthread.php?t=1233328
Am posting here because I don't have enough posts to reply to the thread. Really doesn't make sense that the forum requires 10 posts before I can reply there.
I'm really confused with all the links on the OP. The instructions aren't clear enough for a noob like me. Would appreciate any help here.
Basically I want the fastest/smoothest experience, so no TW for sure, and OC if possible. Am not really sure what deodex does for me so not sure if I need deodex or broodcomb...
So correct me if I'm wrong here.. Never done this before so I'm just picturing it in my head(getting my tab tomorrow so just wanna make sure I get things right) this is how I should do it..
1. I will need to download this and install through odin no matter what... Hmm what does CSC: CPW and XEU mean anyway?
Stock Rom [ODIN] special for XDA Members only ( CSC: CPW and XEU )
2. This is where I get lost. Do I choose between these 3? If yes, what's the differences between them? And where's broodcomb?
CWM KH7ROOT
Stock Deodexed Rom special for XDA Members only
CWM Rom by mabalito
3. Install the non tw update/ themes/etc..
4. where in all these do I fit in the installing of pershoot's kernel? Can OC be done only with pershoot kernel? Does 3G work with pershoot's kernel?
I appreciate any help you can give me. perhaps someone can do me a favour and post this up in the thread so that others can answer it.
Thanks
Ryan
any kind soul out there? I just need someone to help me copy paste my post over to the thread so that others can answer it.
I'm running the stock KH7 rom and it's much better then the KG9 that i had before.
As far as i know, there is no rom for p7500 that doesn't have Touchwiz. In that thread there is just a theme that looks like vanilla Honeycomb, so it doesn't give any performance boost.
Besically you need to install the stock KH7 first (using odin) and then install custom recovery if you want to root or use other modifications posted there.
poisike said:
I'm running the stock KH7 rom and it's much better then the KG9 that i had before.
As far as i know, there is no rom for p7500 that doesn't have Touchwiz. In that thread there is just a theme that looks like vanilla Honeycomb, so it doesn't give any performance boost.
Besically you need to install the stock KH7 first (using odin) and then install custom recovery if you want to root or use other modifications posted there.
Click to expand...
Click to collapse
I've got my tab now and have been messing with it for awhile without much success. I tried this...
1. reboot into cwm recovery
2. install deodexed stock rom via cwm
3. install cwm non-tw (from the thread)
and that resulted in a reboot-loop. So I can't go straight to cwm and have to install stock using ODIN first? okay help me out here a little, I'm still not sure what or where ODIN is...
okay I managed to get it to work after many tries. I used odin(which i think i didn't need to).. then installed the deodexed stock rom, pershoot's kernel, and non-tw..
Like i already said, first you need to install stock KH7 using odin.
Glad you got it working.

[Q] backing up rom/kernel

Hi!
I'm a total noob. This is my first android phone. I've read everything about rooting, and I'd like to install a custom rom, but I'd like to save the stock rom/kernel first. I've found this topic: http://forum.xda-developers.com/showthread.php?t=1075278
I don't really know if these are what I need. Also, I have an xwkf3 device, but it's slightly branded for hungarian T-mobile (the browser has a different name and icon, and it also had every network setting by default).
So, basically I either need someone to tell me which one to download, or better yet, how to create a backup of the whole thing.
Yet again, I'm sorry for asking something probably really stupid. I've tried to google it many times, but I failed to find an answer. Thanks for everyone in advance.
Are you rooted already? If so just boot into ClockworkMod recovery (cwm) and then navigate to backup. (navigate using volume buttons and use home to select)
Sent from my GT-I9100 using xda premium
Here is the kernel rooting thread.
http://forum.xda-developers.com/showthread.php?t=1103399
Dial *#1234# into the phone dialer to find out what firmware you have installed.
Root using chainfires method and make a full backup via CWM.
Flash away. But make sure the Rom/firmware is for your device. Eg i9100 international.
Good luck.
Sent from my GT-I9100 using XDA App
I'm not rooted yet. If I understood everything correctly, the safe kernel is the same for branded/unbranded devices, and only the rom is different?
I'm currently downloading both secure and insecure kernels. After rooting, can I revert back to the secure one to install custom roms?
BTW, thank you for your quick answer
Beco.91 said:
I'm not rooted yet. If I understood everything correctly, the safe kernel is the same for branded/unbranded devices, and only the rom is different?
I'm currently downloading both secure and insecure kernels. After rooting, can I revert back to the secure one to install custom roms?
BTW, thank you for your quick answer
Click to expand...
Click to collapse
I'm not positive but I think if you are rooted and install a stock kernel (without root) you will lose root and won't be able to flash custom roms or make Backups. Its really easy to root, just find the appropriate insecure kernel, flash it with Odin, make backup, and then try new roms!
Sent from my GT-I9100 using xda premium
King Shady said:
I'm not positive but I think if you are rooted and install a stock kernel (without root) you will lose root and won't be able to flash custom roms or make Backups. Its really easy to root, just find the appropriate insecure kernel, flash it with Odin, make backup, and then try new roms!
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
Don't flash back to stock kernel.
Use a jig if you want to get rid of the yellow triangle.
Edit: after flashing one of the cfroot kernels make sure you can get into CWM recovery mode. Vol up+power+home
If you can then you're ok to follow the instructions of the Rom you want to flash.
Sent from my GT-I9100 using XDA App
Thank you. One last question, if I may. Some of the roms I'd try use different kernels, then mine. If I install one of those, and want to revert the phone to factory rom, and kernel, should I root it again with an insecure kernel according to the rom, or one according to my device's current, factory rom?
You will probably find that the Rom kernel will be rooted and have CWM. Just check in the 1st post or 2 of the roms thread.
If you use CWM and make a backup of your stock Rom, after you root now but before you flash any other Rom, you can restore with CWM to get back to stock firmware.
Sent from my GT-I9100 using XDA App
Beco.91 said:
Thank you. One last question, if I may. Some of the roms I'd try use different kernels, then mine. If I install one of those, and want to revert the phone to factory rom, and kernel, should I root it again with an insecure kernel according to the rom, or one according to my device's current, factory rom?
Click to expand...
Click to collapse
To fully return to stock you have to flash a stock rom and stock kernel from Odin. The rom that you want to back up will be a stock rom but it will be rooted because of the rooted kernel. So yea, flashing stock firmware and kernel is the only way to get back to fully stock.
Sent from my GT-I9100 using xda premium
But if I restore my backup rom, and flash it with an original kernel, it would be unrooted, and basically the phoen would be just as it is right now. Is that right?
bck
hi i have the same problem i want to root my gt 2 p5110 but i have to come back at the original values before june and can't loos the warranty....can you help me?

[Q] Flashing back to stock

Hey guys
Sorry for the noob question but I want to double check something before I accidentally brick my phone.
I rooted my phone and flashed the Resurrection Remix ICS 9.7 rom and have had a play with it for a few days and want to go back to stock.
It's using a custom kernel and obviously custom rom.
To flash it back to stock using Odin, how do I get a stock official ICS kernel for an official ICS rom (such as one that you download directly from the Samsung server using CheckFus)? Also does anyone know of a guide that specifies exactly how to do this?
Thanks
You can extract the kernel (zImage) from the rom tarball you download via Checkfus with any program that allows you to work with tars (IZarc, 7Zip, WinRar, etc). No guide necessary, easy as. Open the tar file with said program, find the zImage, extract it. Done.
breumr759 said:
Hey guys
Sorry for the noob question but I want to double check something before I accidentally brick my phone.
I rooted my phone and flashed the Resurrection Remix ICS 9.7 rom and have had a play with it for a few days and want to go back to stock.
It's using a custom kernel and obviously custom rom.
To flash it back to stock using Odin, how do I get a stock official ICS kernel for an official ICS rom (such as one that you download directly from the Samsung server using CheckFus)? Also does anyone know of a guide that specifies exactly how to do this?
Thanks
Click to expand...
Click to collapse
Do you absolutely refuse to use the search function?
this is handy to know i wanted to know same thing ... cheers ppl
MistahBungle - Thanks for the info. Will look into it now.
cdzo72 said:
Do you absolutely refuse to use the search function?
Click to expand...
Click to collapse
Do you absolutely have to post such useless stuff?
If you've got nothing good to say, don't say anything at all.
Need ROM to roll back to
Just got a i9100 with 2.3.4:
PDA:I9100XWKH4
Phone/Baseband (modem): I9100XXKH3
CSC: I9100OXXKH2
I don't find this rom on the roms page, and I understand I need it to be on my PC ready to flash with Odin, in case by flash to 2.3.6 doesn't work out (that's the only way to roll back, right?)
Where can I find this rom?
Thanks!

I want to buy S2

Hi S2 user, :angel:
I will buy a new S2 phone soon. I need a little help from you guys. I need to know something about S2 :laugh:
My old phone is Xperia Arc S. This phone need following step to flash kernel and rom.
Kernel:
For flash a new kernel, I need to unlocked the bootloader first. Then this phone can flash any kernel anytime. But unlocking the bootloader will void the warranty.
Rom:
For flash a new rom, as long as the rom does not need to have specific kernel, in other word, stock based rom, no unlocked bootloader required. Just install the CWM and flash the rom.
How about S2 guys? Do I need to unlock something before flash kernel and rom? Can someone explain clearly or likes how I explain my old phone.
p/s- i read in some thread, doing a factory reset in cwm will make S2 brick? hard brick? can't even power on the phone. OMG is it true?
its very scary because in Xperia Arc S, i always flash a new rom. flasholic
I don't want my new S2 brick
I hope you guys can help me. Thanks
faiz5200 said:
Hi S2 user, :angel:
I will buy a new S2 phone soon. I need a little help from you guys. I need to know something about S2 :laugh:
My old phone is Xperia Arc S. This phone need following step to flash kernel and rom.
Kernel:
For flash a new kernel, I need to unlocked the bootloader first. Then this phone can flash any kernel anytime. But unlocking the bootloader will void the warranty.
Rom:
For flash a new rom, as long as the rom does not need to have specific kernel, in other word, stock based rom, no unlocked bootloader required. Just install the CWM and flash the rom.
How about S2 guys? Do I need to unlock something before flash kernel and rom? Can someone explain clearly or likes how I explain my old phone.
p/s- i read in some thread, doing a factory reset in cwm will make S2 brick? hard brick? can't even power on the phone. OMG is it true?
its very scary because in Xperia Arc S, i always flash a new rom. flasholic
I don't want my new S2 brick
I hope you guys can help me. Thanks
Click to expand...
Click to collapse
You don't have to unlock. Just download Odin and flash all the ROMs/kernels you want. As for the cwm brick bug, your phone will only brick if you factory reset through CWM in 4.0.4. In other versions you should be fine.
Sent from my GT-I9100 using xda app-developers app
S2 is the best phone to flash No problem with bootloader lock, you download Odin und happy flashing
Gesendet von meinem GT-I9100 mit Tapatalk 2
preseodymium said:
You don't have to unlock. Just download Odin and flash all the ROMs/kernels you want. As for the cwm brick bug, your phone will only brick if you factory reset through CWM in 4.0.4. In other versions you should be fine.
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
Thanks for your reply. For the brick bug, how come I want to factory reset when flashing new rom? And I think latest firmware for S2 is 4.0.4. Correct me if im wrong.
faiz5200 said:
Thanks for your reply. For the brick bug, how come I want to factory reset when flashing new rom? And I think latest firmware for S2 is 4.0.4. Correct me if im wrong.
Click to expand...
Click to collapse
I am currently installing 4.1.2, unofficial of course
The brick Bug problem by 4.0.4 only with Stock Kernel ! when you have 4.0.4 on your phone you flash a save Kernel (Siyah, Dorimanax .....) with Odin (only Odin not Cwm )
and it was save .After you can flash wath you want
smooth 123 said:
The brick Bug problem by 4.0.4 only with Stock Kernel ! when you have 4.0.4 on your phone you flash a save Kernel (Siyah, Dorimanax .....) with Odin (only Odin not Cwm )
and it was save .After you can flash wath you want
Click to expand...
Click to collapse
I see. So the brick bug actually come from the kernel inside firmware 4.0.4. Not the entire 4.0.4 firmware. Is other custom kernel likes you mention (Siyah, ..) is 100% safe?
faiz5200 said:
I see. So the brick bug actually come from the kernel inside firmware 4.0.4. Not the entire 4.0.4 firmware. Is other custom kernel likes you mention (Siyah, ..) is 100% safe?
Click to expand...
Click to collapse
enjoy ur s2, i just got the s2 and flash over 20 roms like crazy!! jajaja is very good phone
faiz5200 said:
I see. So the brick bug actually come from the kernel inside firmware 4.0.4. Not the entire 4.0.4 firmware. Is other custom kernel likes you mention (Siyah, ..) is 100% safe?
Click to expand...
Click to collapse
100% safe! Her is ohter 100% safe Kernel http://forum.xda-developers.com/showthread.php?t=1877270
for 4.0.4 Stock In this thread you found more to the theme brick bug.
I flash my S2 i don t know:victory: 100× no Problem S2 likes flashing
faiz5200 said:
Thanks for your reply. For the brick bug, how come I want to factory reset when flashing new rom? And I think latest firmware for S2 is 4.0.4. Correct me if im wrong.
Click to expand...
Click to collapse
You factory reset when installing ROMs to make sure there are no errors. Plus with siyah kernels, you can't be 100% sure your phone won't brick when factory reset in CWM. Best is to flash 4.0.3 before doing anything else.
Sent from my GT-I9100 using xda app-developers app
Rooting
Guys.. 1 more question.
When I get my S2, I plan to flash custom rom like aosp or aokp but not stock rom.
Do I need to root my S2 first before flash any rom? Because my Xperia Arc S, I do not need to root because root come inside with the custom rom zip. So when I flash a new rom, my Xperia automatically root. No need to do other step.
I'm curious about this because I see in some thread, talking about cf root or something like that. The thread is very updated. Looks like it very necessary to do it at least once to have root before flash any custom rom.
Please explain for me about this root. Thanks guys.
faiz5200 said:
Guys.. 1 more question.
When I get my S2, I plan to flash custom rom like aosp or aokp but not stock rom.
Do I need to root my S2 first before flash any rom? Because my Xperia Arc S, I do not need to root because root come inside with the custom rom zip. So when I flash a new rom, my Xperia automatically root. No need to do other step.
I'm curious about this because I see in some thread, talking about cf root or something like that. The thread is very updated. Looks like it very necessary to do it at least once to have root before flash any custom rom.
Please explain for me about this root. Thanks guys.
Click to expand...
Click to collapse
I'm not sure about CF root though. Although the ROM I am in now has built in kernels, I still think its best to root first as some ROMs may not have the built in kernel (never searched other ROMs not entirely sure). I might recomment siyah kernel though
Sent from my GT-I9100 using xda app-developers app
preseodymium said:
I'm not sure about CF root though. Although the ROM I am in now has built in kernels, I still think its best to root first as some ROMs may not have the built in kernel (never searched other ROMs not entirely sure). I might recomment siyah kernel though
Sent from my GT-I9100 using xda app-developers app
Click to expand...
Click to collapse
uhh.. So root is come from kernel? Ermm.. so it different than xperia. So if I flash siyah kernel, I do not need to root?
faiz5200 said:
Guys.. 1 more question.
When I get my S2, I plan to flash custom rom like aosp or aokp but not stock rom.
Do I need to root my S2 first before flash any rom? Because my Xperia Arc S, I do not need to root because root come inside with the custom rom zip. So when I flash a new rom, my Xperia automatically root. No need to do other step.
I'm curious about this because I see in some thread, talking about cf root or something like that. The thread is very updated. Looks like it very necessary to do it at least once to have root before flash any custom rom.
Please explain for me about this root. Thanks guys.
Click to expand...
Click to collapse
Some people want to simple root their phone and don't care too much for custom roms and stuff. So for such people, they can simply root their phone using one of the many rooting methods mentioned.
However, if your primary aim is to install a custom rom/ kernel, you can use Odin to flash a custom kernel on your phone. (like siyah, dorimanx, Philz, the list goes on..) and you'll have root. Thereafter you can install a custom rom compatible with the kernel. Earlier on it was simple. Flash siyah or dorimanx and any custom rom will work on it. Kinda like a 'one size fits all' deal. However, right now with new mali drivers etc, some versions of a kernel are reqd based on which rom you plan to install. (JB with new mali drivers or JB without those new mali drivers/ICS)
CF-Root is the method I'd used..but right now it's not recommended, since if you're on certain 4.0.4 firmware, that is susceptible to the emmc brickbug I'm sure you've read about. Siyah, dori, etc kernels are safe.
HAXTREME said:
Some people want to simple root their phone and don't care too much for custom roms and stuff. So for such people, they can simply root their phone using one of the many rooting methods mentioned.
However, if your primary aim is to install a custom rom/ kernel, you can use Odin to flash a custom kernel on your phone. (like siyah, dorimanx, Philz, the list goes on..) and you'll have root. Thereafter you can install a custom rom compatible with the kernel. Earlier on it was simple. Flash siyah or dorimanx and any custom rom will work on it. Kinda like a 'one size fits all' deal. However, right now with new mali drivers etc, some versions of a kernel are reqd based on which rom you plan to install. (JB with new mali drivers or JB without those new mali drivers/ICS)
CF-Root is the method I'd used..but right now it's not recommended, since if you're on certain 4.0.4 firmware, that is susceptible to the emmc brickbug I'm sure you've read about. Siyah, dori, etc kernels are safe.
Click to expand...
Click to collapse
I see. Thanks. Flash kernel using odin. I see in this thread http://forum.xda-developers.com/showthread.php?t=1125282 , he said flashing a kernel is same like flashing a custom rom which is in CWM. Flash kernel in CWM? I thought the only way is using odin.
faiz5200 said:
I see. Thanks. Flash kernel using odin. I see in this thread http://forum.xda-developers.com/showthread.php?t=1125282 , he said flashing a kernel is same like flashing a custom rom which is in CWM. Flash kernel in CWM? I thought the only way is using odin.
Click to expand...
Click to collapse
For S2 we can. Because it won't increase your flash counter. But I never tried flashing through CWM.
Sent from my GT-I9100 using xda app-developers app
faiz5200 said:
I see. Thanks. Flash kernel using odin. I see in this thread http://forum.xda-developers.com/showthread.php?t=1125282 , he said flashing a kernel is same like flashing a custom rom which is in CWM. Flash kernel in CWM? I thought the only way is using odin.
Click to expand...
Click to collapse
There are two ways of flashing a kernel.
1. Use the .tar version of the kernel and flash via Odin
(the same way you'd flash the cf-root kernel you'd mentioned in a post above. I'll assume you know the steps as they're mentioned in chainfire's post. Or there are many posts on that topic)
Advantages: tried and tested route, simple one step method. You're rooted and have a custom kernel in about 30 secs.
Disadvantage: You rely on Odin and the connection to your computer which some don't trust. Increases flash counter.
2. Use the .zip version of the kernel and flash via CWM.
Since in this case you need CWM to start off with, you can use Rachmat3's method described HERE to get temporary CWM first.
Advantages: No computer needed. Everything happens through your phone. Flash counter isnt increased.
Disadvantages: Can be a little finicky at times..but you'll get there eventually. Involves 2 steps. First get temporary CWM, then install custom kernel via cwm.
You can start off with a very popular kernel. Gokhanmoral's siyah kernel.Both the zip and tar versions are available downloadable from HERE
HAXTREME said:
There are two ways of flashing a kernel.
1. Use the .tar version of the kernel and flash via Odin
(the same way you'd flash the cf-root kernel you'd mentioned in a post above. I'll assume you know the steps as they're mentioned in chainfire's post. Or there are many posts on that topic)
Advantages: tried and tested route, simple one step method. You're rooted and have a custom kernel in about 30 secs.
Disadvantage: You rely on Odin and the connection to your computer which some don't trust. Increases flash counter.
2. Use the .zip version of the kernel and flash via CWM.
Since in this case you need CWM to start off with, you can use Rachmat3's method described HERE to get temporary CWM first.
Advantages: No computer needed. Everything happens through your phone. Flash counter isnt increased.
Disadvantages: Can be a little finicky at times..but you'll get there eventually. Involves 2 steps. First get temporary CWM, then install custom kernel via cwm.
You can start off with a very popular kernel. Gokhanmoral's siyah kernel.Both the zip and tar versions are available downloadable from HERE
Click to expand...
Click to collapse
Another disadvantage of "not using" odin is when you cant enter cwm.
I use cwm and mobile odin.I flashed a kernel and couldnt access cwm nor phone would boot.
So I had to fix it using my pc via odin.

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