How to root Samsung Galaxy S2 with CF-Root? (Video)

Simple and helpful guide, thank you jayce this help me alot

Hi, many thanks for your very useful posts 🙂

I m also a galaxy s2 user. Do you know any direct way to synchronize your contacts, calendar etc. directly with outlook 64bit? without uploading your data to cloud servers..

Hi

Seems odin does nothing when I connect my phone in download mode and do every step as you told.Maybe my computer doesnt have the samsung drivers?

after doing this process,do i need to root again using superoneclick? forgive me,im a new at this..and i really need your expert opinion..and if you ever have or know where i can read bout the benefits or what to do after rooting,kindly post it..thanks in advance..

Thanks for the instruction.

What’s up with the exclamation mark on the screen when you boot up after rooting?
Is it some kind of error caused from rooting?

Thanks in advance

hi all i hope someone can help me with this,
i have kernal version BOKF3 from t-mobile what CF-Root for Samsung Galaxy s2 should i download ?

This worked like a charm. Brilliant! 🙂

Can a phone be ‘un-rooted’ for warranty purposes? If so, how?

Thanks

any guide for Desire HD? 😀

Hi Jayce! when i click on the link to my cf root (xx oxa kg3) i download one zip file, but when i use winrar to unzip it i only obtain one “zImage” file but no tar file. What im i doing wrong?
Thank you in advance

thank you Jayce!!
Lightnin fast response.

hi jayce..
can u pls help me, first i root my phone with superoneclick (XXKF1) , then i install litening rom to my phone (xxkg6)… it works fine, but my cwm show current kernel: unknown..
do i need to cf-root or what.. pls guide me… thanks

Thank you Jayce, this is by far the best and easiest way to root the phone, I learned a lot of things in your web.
Is there any way to donate?
Thank you very much

Wow you blow me away! This is the beauty of people and the beauty of an open source platform.
Best regards from Spain!

Hi mate I downloaded Odin3 but when I try to open it it says OdiN3 & what looks to be japanese words.
I don’t know what to do I tried other links & it the same thing please help me I ready subscribers to your YouTube channel for help. Thank you

i installed cf-root ,and make backup.

now when i restart the phone there is a yello triangle .

its ok ?

Great stuff! Thanks mate!

Hey Jayce,
I have recently got a SGS2 and am looking to root it. I see that there are more than one way of rooting it. There is super one click root, one click root and ofcourse your root the cf root.
What I want to know is how is your root different the other root methods are there any advantages in cf root over the other ones.
Regards

Beautiful. Found heaps of sites with rooting instructions – but all seemed so complicated I hesitated. This was by far the simplest way.

hi there just got my galaxy s2 today bloody love the phone much better then my poor we rooted hero lol any way just wondering if i follow your way of doing this does this mean i can flash custom roms to my phone now thanks for any info

thanks very much as soon as i read a bit more up on it will go for it.it sound easier than when i first rooted my hero just dont want nothing to go wrong

really good job … thanks alot

hi Jayce I have a brand new Galaxy S 2, I would like to root it but I would like to know if I have to do a backup first before the rooting process, I’d like to have the chance to go back to the original firmware that came with the phone. My CS2 is a branded phone. Thanks for you help.

Hi Jayce, nice to meet you…
I am a new SG2 user from Malaysia…
I upgraded my android from 2.3.3 to 2.3.4 and eventually this caused my warranty became void. So, i am thinking to downgrade it (is it called unroot)…

My current kernel version is 2.6.35.7-O91000XXKG3
Android version : 2.3.4
Build number : Gingerbread.XXKG3

So, shall i download ” XX_OXA_KG1 ” and follow what u showed in tutorial ?

Hi Jayce, i would like to root my 3 weeks old sgs2 after reading your 10 reason to root sg2. So i need some help from you…

Android version 2.3.3
Baseband version I9100DXKH1
Kernel version 2.6.35.7-I9100DXKH2-CL483911 root@DELL138KH2
Build number GINGERBREAD.DXKH2

so, which CF Root i need to use…
XX_OXA_KH1 or XX_OXA_KH3

TQSM….

Hi jayce,

I upgraded my android from 2.3.3 to 2.3.4 using XXKG5 firmware.
If i want to install CyanogenMod Rom,did i need to install XXKG6 firmware 1st…?
CyanogenMod rom is stable or not for galaxy S2…

Hi, Jayce!
I just got a Samsung Galaxy S2 last week and i was looking for a way to root it. This by far is the easiest method. But since i am a cautious user, i would like to know the risks involved (everyone has told me that there are none!) and if my phone is compatible. Through *1234# i got to know the following info:

PDA: I9100XWKF3
PHONE: I9100DDKE4
CSC: I9100ODDKF3
Build info: (Is it really important to know that?)

Please tell me if my phone is compatible. I live in India(No special/locked carrier) and I would really like to root it!

Hi Jayce,
I have 2 questions:

1. Will your guide to root the Samsung GS2 work on Mac OS X 10.6? I have just ordered the phone and it should be arriving in a few days, and I want to root it (primarily to remove some of the bloatware and save on battery life). I don’t have a Windows PC.

2. If it absolutely does not work on Mac, and if I do manage to get access to a Windows PC, will it work with Windows 7 or Vista or XP?

Thanks in advance for your help.

Hi Jayce,

Have a look at this~

http://forum.xda-developers.com/showthread.php?t=1125414

Hi Jayce

What if root PASS! and reboot still hang on the 1st screen ? Anyway to get back the original kernel? or reset to the original ?

Thank you. Following your blog I love more and more the Android stuff.
Many thanks for your precious guide/advice/clarity

Hi Jayce,

Applying CF-Root means flashing a kernel right? Does it void my warranty (eg when send for maintenance)?

If not, is there any need to flash stock kernel? How do I revert to stock?

Hi

I just faced a truble when i run odin3 it wont see my phone (my phone is USB connected and in odin mode) whats wrong ?

I know the root will works 100% but I wanted to know that my phne settings, installed apps, contacts and more will be erased or it will remain exactly same and root would like…no changes ?? please reply.

thank you very much!! IS the clockwork mod already there in the SGS2?

And have you made a video on using the rooted SGS2…like adding custom ROMs and more?

Hi Jayce ..thanks for this amazing site ..

i just got my SGSII 3 weeks ago ..everything is ok but the battery lifetime is very short, dnt last more than 8 hours (while sleeping means no use at all) is that normal ?
one more question, i noticed that everybody is asking about switching from 2.3.3 to 2.3.4 i just checked my devide i found out it’s already 2.3.4 did they upgraded it recently ?
please check my infos and tell me if i need to upgrade :
Android version : 2.3.4
Baseband version : I9100XXKG5
kernel version : 2.6.35.7-I9100XXKG5-CL420550
se.infra@SEP-41 #2
Build number: GINGERBREAD.XXKG5

Many thanks in forward ..

Based on the instruction video and the versioning, I am assuming this is for the i9100 version and not the dumbed down U.S. version the T-989…is this correct?

hey can anyone help me? im new at all of this so forgive me if my question is basic, but when i hold volumeup, home, power i dont get the custom os screen instead i get a manual something or other screen. just wondering why this is and how i can root my galaxy around this problem.
thanks.

thanks

Hi I need some help. I cant get my phone on download mode as I have the AT&T version of galaxy s2 (also known as attain) and in this version the home button is not a physica button. Can anyone tell me how to do it?

Hi Jayce! I was wondering if this method is “permanent”. I’ve read somewhere that only the temporary root for the SGS II has been acheived. What do you say?

The in-call volume on my Galaxy S2 is very low even i set max call volume

Hi Jayce! I have successfully rooted my samsung galaxy s2! thanks to you! thank you very much!

my question now is..can i upgrade it to the latest firmware? and can i upgrade my android OS to 2.3.4? By the way when i rooted my phone.. we have the same “about phone” details.. and i watch your video regarding how to remove the yellow triangle..it seems like you upgraded your firmware.. because uv used xxkg5 there..when you root ur phone, ur on xwkf1 right? id wait for your reply! thank you!

tnx! so i have to use cwm all the time when i want to upgrade? can i use cwm to upgrade android OS? and i have a question for you, whats the best custom rom/firmware for you? and for example i want a fast and a battery saving rom, what would that be sir? tnx for all the reply! thank you!

and what it is the difference between roms, mod, firmware? tnx jayce!

how long have you been using the checkrom rom? is it really fast?

hey guys,i know that there has been a lot about the root,the installation of clockworkmod so i am sorrry for being redundant.my probleme is that i would a good soul to explain me from how to root my samsung galaxy s2 to istalling clockwordmod and if possible all the stuff i should use for that.being as explicit as possible will be appreciate.i precise that i have the korean version.all the details here
model version:SGH-M250K
Firmware Version:2.3.3
Baseband Version:I9100XXKDJ
Kernel version:2.6.35.7-M250k.EE05.0315-CL18686…
Build number:Gingerbread.EE05.HIAPK_v1.0

thanks,i already sent them a note,but nobody replied.if i wanna flash the original rom again with odin,which rom should i download please??

I followed another guide that suggested a tool called s2 root. I then tried installing cyanogen (7.1 stable with google apps), but ran into some trouble. CWM keeps whining about incorrect signatures when i try to use it from the standard app menu and refuses to install. I did get it to install by booting into cwm, but then my phone wouldn’t go any further than the boot screen. It did load cwm again, so I’m back to original ROM now at least.
If I understand my googling correctly the signature errors are due to me using the wrong kernel. I’m just a normal luser and don’t really know what would be a safe solution to this. Will installing the CF-root kernel solve this straight up, or is there some other magic that must be applied first?

hi jayce i wanted to ask you that is there any way i could make the backup of my stock kernel and then root my phone

Hello Jayce,

I’m trying to root my samsung galaxy s2, but there’s a problem.

It’s about odin, do I have to extract the file?
I don’t get on my scree Adroid SLP etc.

What I’m doing wrong?

thanks

Johan

Hi Jayce, i had just rooted my SGS II after secceed i just click open CWM then it’s always restart phone around 1 minute. what’s wrong? it’s seem Loop Restart phone.

How can i fix it? or something wrong? Plz Plz Plz i really scare…. :'(

ok anyway thanks for ur solution 😀 i’ll try.

Hi jayce….

I am newbie into android world and all this customization ….so please don’t mind my very basic questions..

What is the difference between flashing your phone with stock kernel and rooting your phone…What i could understand that perhaps essentially they are same things except that we root phone with modified files from the same stock kernel done by some guy chainfire….Is it right ? Please explain.

At any stage why do we have to flash our phone with the stock kernel……….?

hi…

i have a slight problem with my SGS2 i’ve already rooted my SGS2 previously it was running with DXKG3 (indonesia) and now it’s

Android v2.3.5
Baseband v I9100XXKI4
Kernel Siyah 2.1
CheckRom HD v2.0

my phone will automatically switch to silent mode, even though i’ve set it as ringing mode. it will always turned to SILENT…

have i rooted my SGS2 in a wrong way?

i’ve tried to use Volume COntrol App but no use. Need your help, please…

thank you very much

hi Jayce got a question regarding rooting, if ever, I already upgraded to XXK14 can i still root my sgs2????

Hello Jayce.

First of all, just wanna say thank you for this easy to follow guide. Been really helpful~

Just wanna ask though, I am currently using villainrom 3.0 and when I downloaded a root app like titanium backup and busybox, it says “No root access”. Any way to fix this??

Thank you for your immediate response.

EDIT: Oh never mind. I followed your instructions above and it worked.

Thank you~! 😀

Hi Jayce,

I rooted my 2.3.5 sgs2 without any problem and installed marketenabler for foreign market applications like paid ones however i can’t pay for them but i can download the free ones. it says “source can’t be found” or something else when i try to pay and download something. i know the currency is different in all countries but the purpose is this application is to help for that? i’ll be appreciate if you help me with it 🙂 thanks.

I just need to confirm:
My SGS2 GT-I9100G white, Malaysia
Android version: 2.3.6
Baseband version: I9100GDZKJ2
Kernel version: 2.6.35.7 se.infra@SEI-30 #2
Build numer: GINGERBREAD.DZKJ2

So, I should download and use this CF-Root “XW_XEF_KJ2”? or other?
thanks for help

Hi Jayce,
I successfully rooted my SGS2 using this method. Now, how do i upgrade my firmware to 2.3.5? I heard 2.3.5 can improve battery performance. Sorry for a newbie question.

Hey Jayce,

Thank you for this awesome video.
currently my sgs2 is rooted, do I need to unroot and use that method to get cf root or use it without unrooting.

Thanks in advance

I did everything exactly as you explain ! odin pass ok ! bat when i open my sg2 i cannot see the CWM Manager and Superuser !!! any idea ?

I am sorry for my bad English. for me telephone of Samsung Galaxy S II Skyrocket At&t. I need root.problem in that kernel version does not have letters (2.6.35.11) help please!!!!!!!!!!!!!!!!

Hi Jayce,

I’ve already done step 14. There was a Green PASS appearing on ODIN window and my phone restarted. There was a yellow triangle at the bottom of the start screen of my phone. However, everything stopped there. My phone couldn’t finish the rest of the procedures.

Now, my phone cannot work because the screen is like that for hours. Until now, I don’t know how solve this problem because my computer can’t recognize the device when I make a cab connection with the computer.

Please help me !

hello again jayce. i have a question. if i flash cyanogenmod 7.1 to my sgs2 then can i flash ice cream sandwich when its released for sgs2? if so how can i do it?

Yo, bro, can u tell me wat skin protector u use, so nice~ btw which CF root suit for 2.3.6?
and when root, will all the apps be gone?

Hey Bro.

I really need your help in rooting my s2. I recently purchased a new s2 want to root it.

The details of my cell is below.

Android Version:2.3.5
Baseband Version: I9100XXK14
Kernal Version : 2.6.35.7-I9100JPKJ2-CL655700root@DELL143#2
Build Number : Gingerbread.JPKJ2

Can you tell me if this CF Root XW_XEF_KJ2, will work for my cell. if no can you provide me the exact CF root for my cell.

n even a method of removing the yellow triangle at the boot up.

Highly appreciate ur help in this matter.

hey bro..

Thanks for your reply, so if that is the nearest match, will work in rooting ma cell with out causing ne harm??

🙁

so if i use this root ” CF Root XW_XEF_KJ2″ it will work rite.

ur sure bro .. nothing will go wrong rite

if ne things goes wrong i can restore my orginal state rite.

is the below the rite stock kernal for ma cell

JPKJ2

Firmware info
PDA:JPKJ2
PHONE: XXKI4
Date: 13/10/2011
Android 2.3.5

OJP (ABS, AFG, BTC, EGY, JED, KSA, LEV, MAT, MED, MID, MMC, MWD, OTU, PAK, THR):http://www.multiupload.com/CM6XON5S36

XSG (UAE): http://www.multiupload.com/UQMCDCD9LD

JPKJ2 Stock Kernel:http://www.multiupload.com/DUNKIR221F
Password: intratech@XDA

hi,jayce,i am the gay with the korean galaxy s2.still didnt find the right cf root for?my kernel is M250k.EE05

then is there anyway i can install CWM on my phone?i already rooted it.thx

hey bro

hope u doin well..

i had recently rooted ma s2 n now to remove the yellow triangle at the boot up, i had down loaded the stock kernal, but it got downloaded as . exe file and can not be extracted ,,can u help me pls

whn i double click it comes run or cancel, whn i click run, nothin happns

i use 7 zip oli.. is thr ne wy u can extract it n send me as a attachment

ma stock kernal is JPKJ2

bro.. i tried 4-5 times still the same issue. plus ma super user image is diff from the one you have in the video.

bro i exctracted the stock kernal but came as .tar.md5 and when i add it in the PDA it does not show added in the side as in ur video

yeah bro, i hv samsung kies installed

as in , in ur video it shows two added in the left side when u add the PDA n u high the second added, it does not show he that, it oli shows one added even after adding the PDA

whn u put the cell in download mode and connect it with the usb to the pc, in the odin, in the message box it shows added, removed n again added, thn u insert the .tar file in the Pda n click start. well me t oli shows one added in the message box

Hi Jayce,

I rooted my phone sucessfully. However, it is no longer to connect my phone with the laptop using Kies. I used the kernel downloaded from http://www.mediafire.com/?bje95k15vkceq8y.

Can you explain to me if this is the normal situation when the phone is rooted ? Or there is a problem with my phone, and how can I solve it ?

My phone is i9100G. Thank you in advance.

Sorry for this stupid question, what does “custom” in your answer mean ? I am not a native English speaker, so sometimes I have some misunderstanding for unfamiliar language.

Then, will my phone be still rooted ?

Hi Jayce.

I would like to ask you a question regarding rooting my S2 with CF-Root.

My phone details are:

Android 2.3.5
PDA: I9100BGKJ3
PHONE: I9100XXKI4
CSC: I9100XECKJ2
Kernel: 2.6.35.7-I9100BGKJ3-CL691334 root@DELL128#2

It’s a mobile phone from Movistar in Spain.

Keeping in mind details above, I have a doubt regarding which CF-Root should be used:

CF-Root-SGS2_XW_XEN_KJ3-v5.0-CWM5? or
CF-Root-SGS2_XX_XEO_KI4-v4.4-CWM4?

I’m quite sure CF-Root should be related to firmware version, but I’m quite confused which reference (PDA, PHONE, CSC or Kernel) should I use to get the correct CF-Root to be installed.

Can you help me?

Thanks in advance.

Thanks Jayce.

I’ve rooted my S2 without any problem, and I can see CWM in recovery mode, and exclamation mark when starting.

But … how can I be sure that it’s rooted? I’ve installed Terminal emulator application and I tried “su -” getting permission denied.

Any idea?

Rgds

I installed superuser application to grant access each application and it works fine.

But … one thing that it stopped working is that wifi can’t get an ip address with dhcp. It stays “Getting an ip address” for ever, without progressing finally saying “Connected” as expected.

Any idea about it?

Thanks

hey bro..

can i install android 4.0 (ice cream sandwich) is the update officially out. how to install it, and will it work fine..

any video link for that bro, or any step to step guid???

bro.. i have rooted ma cell, so updating the firmware wont be a problem know.

will i lose the application installed…

thanks bro.. will try it out and let you know..

have you tries installing 4.0 on ur s2.. m tryin to search the official firm ware for 4.0, but not findin it, whn i tried updating the firmware usin samsung kies, it showed me the current firmware and the latest firmware same…

can you tell me if using cf root latest version will void my warranty or change my country or make that yellow triangle? and what rom to use?

bro … i dont think the official firmware of 4.0 is out. coz the ones which r out thy are not truely functional, the bluetooth wifi n sum other function does not work once installed rite

Would ROM manager work after installing cm 7? It should over write the kernel.

good day my fellow asian,,seasons greetings..i’m from the philippines and now i’m in england and i bought a new gs2 from o2. i’ve been reading the comments of the people who rooted their phones via this tutorial and i’ve been wondering why some of them are not successful even if they did the process correctly.is it because they have downloaded the wrong file? anyway i want to root my phone so i can install https://www.jayceooi.com/2011/11/23/how-to-freeze-disable-remove-system-apps-in-android/#more-9339. i believe it will only work on rooted phones right?by the way, i have upgraded my version to 2.3.5 via kies after following your tutorial.here are my info:
android ver: 2.3.5
baseband ver: i9100xxki4
kernel ver: 2.6.35.7-i9100xwkj1-cl647431 root@dell150#2
build number gingerbread.xwkj1

is this the right file for my s2? XW_LUX_KJ1.i saw this from one of your post,,
last thing, is there another way to revert back to original firmware aside ffrom using usb jig?tnx in advance and more power

jayce good day to you..i downloaded the 7 zip file manager..when i opened the file, it still says zimage,,but when i click on its properties, it says that the file type is .tar..is that ok?does it really say zimage?tnx my good man

Do I need to unroot first if I already rooted with SuperOneClick and would I lose all my data after the flash ?

Thanks for the guide, now it doesn’t look that scary.

Hello.
My samsung galaxy s2 version is 2.3.5
Baseband version: I9100NEKI2
Kernel version: 2.6.35.7- I9100XWKI8-CL616395root@Dell # 2
Build Number: GINGERBREAD.XWKI8
Is there a problem if my baseband version is different from Kernel and Build number?
It’s like that because I made an update on Kies.
Also, it will be ok to cf-root my phone with XW_NEE_KI8, right?
Thanking you in advance.

hi Jayce,

im a new owner of samsung galxy s2 i9100.im trying to root my phone and im looking for the correct cfroot for my phone. my kernel version is 2.6.35.7-I9100ZSKI3-CL603802se.infra@SEP-78 #2. Please help.tnx!

hi bro,

i m currently using android 2.3.5 and i want to upgrade it to 2.3.6, i have rooted my s2,

so i dont guess u can update the firmare using samsung kies. at present ma kernal version is

2.6.35.7-I9100XWKJ2-CL676699root@DELL144#2.

Can u suggest me any good firmware other than 4.0 which will work with my s2 and help

improve performance, send me the link as well. (Please note m a middle east user ..dubai)

Thanks

but can android 2.3.6 work on my s2

so installing 2.3.6 is jus lik rooting, hv to do it in odin, its lik a custom rom rite, but can we install a custom rom over a custom rom

bro i jus wanted to one thing, can we update the firm from samsung kies, even aftr installing custom rom

oh ok. thnks for that info… well i will be innstalling android 2.3.6 custom rom, it does not wipe of data o apps rite.. does language change

can you suggest ma an android 2.3.6 custom rom firmware. .. which will wipe off any data or cause any harm.. 2.3.6 help improves battery performance

this is android 2.3.5 as shown in the image, i want 2.3.6

bro wats the use of DigiLezen and Samsung MMM

hey bro.. m kinda confused with updating my s2.. as u knw ma cell is already rooted and rite now the details of my cell is..

android version 2.3.5
baseband version: I9100XXKI4
kernal version : 2.6.35.7-I 9100XWKJ2-cl676699root@DELL144#2
Build number :GINGERBREAD.JPKJ2.

I want to update to 2.3.6, so can you advice me a custom firmware for this.. pls

thnks for ur help….

Hi bro,
my ph model is GT-9100G
Baseband version I9100GDZKJ2
Kernel version 2.6.35.7 se.infra@SEI-30#2
Can you advice me which Kernel version need to use to root?

Nice!!! I read a lod on XDA and TheUnlockr, and seems similar, but I decide to follow your instructions. My phone have ROOT access now!

THANKS!!!

thank you very much to get my phone rooted in only one minute
now can you help me with chainfire application plz

how to remove yellow triangle after root

When the ODIN MODE appeared, the Custom Binary Download is set to NO. Then at the Odin3 at my pc, there is nothing added at the “Message” box and at the “ID:COM”.. Can you please help me to figure out what is the problem?

I’m using “Ubuntu 10.04 LTS – Lucid Lynx” OS and running Odin3 using Wine..
Thanks!

Hi as I told you earlier I upgraded to 2.3.6 through KIES(previously I had rooted 2.3.3 by original and insecure kernel method).So,I lost root access in update process.
Suppose I root 2.3.6 now with CF root,how do I unroot it if I wish so later?
Is it done by flashing my rooted CF kernel with original (that is,NOW updated XWKL1 corresponding to 2.3.6) through ODIN?Please reply.
Thanks

hi Jayce,
by stock kernel,you mean original kernel of my previous(2.3.3)ROM or updated 2.3.6ROM?
It was XW KF3 earlier,now XWKL1.

Hey Thanks for quick reply.
Sorry to ask you again but I think flashing with my stock kernel just removes that yellow exclamation mark at the start up..the phone remaining rooted.I can says so because when I first rooted old firmware with insecure kernel method,I used S2 root.exe program.It had root and unroot options in it.I remember flashing stock kernel just remove yellow mark.

Hey jayce
Just coming out of a shock!I rooted my phone again easily as you told.Just installed ROM toolbox and tried to change battery icon and suddenly my status bar vanished so i rebooted my phone only to realize that it wasn’t starting at all!I could only see yellow mark and Galaxy S II ,no further progress.My God!Tried flashing stock kernel again but no use!
I was unable to get into recovery mode because I had not backed up with CWM5.So I flashed again CWM 4(with which I had taken Nandroid backup previously)thank god…got into recovery and restored system…Now,it is opening but reverted to 2.3.3(Backup).what could have caused problem?

Now I’m facing another different problem.When I flashed my original XWKF3 kernel,and connected to KIES,I am unable to see 2.3.6 version available message.Previously I had updated through same.But now it says “Your device does not support firmware upgrade”.How can I again upgrade through KIES?
Baseband version-I9100DDKL1
Kernel-I9100XWKF3-CL276555root@DELL101#2
Build number-GINGERBREADXWKF3
Please suggest some solution to my update via Kies

hi jyace..

can u advice me a good custom firmware or rom.. which is stable and will give me good performance n battery life.. well i have already rooted my sgs2. info is as below.

android version 2.3.5
baseband version: I9100XXKI4
kernal version : 2.6.35.7-I 9100XWKJ2-cl676699root@DELL144#2
Build number :GINGERBREAD.JPKJ2.

please advice.. kinda bord with the interface.. help!!

many thnks in advance brother…

hi jayce ..

thnks

1) i have to download the xxki4 .zip file, paste it in the internal sd card of my sgs2, n follow ur video rite.
2) god forbits, if sumthing goes wrong, can i flash back to my orginal state.. n how (link)

hi jayce …

tx.. ur too good :), jus one more thing

was going tru the xda web site found this [XWKK5][2.3.6] CheckROM RevoHD™ V4 | DarkKnight™ V2.5.2 .. is this the latest CheckROM RevolutionHD .. did u try it??

hi brother..

m planning to install that, just backed up ma sgs2… but it the xda they say we need to hv kitchen pro.. can u tell wat is that n its use, cant i jus copy the zip file in ma ssg2 int sd card an ju srun it try cwm??

ah ok.. procedure is the same right, copy .zip file in sd card n run try ClockworkMod Recovery Mode.

just two more thing jayce

1) sud the zip file be in any particular folder, or i just copy it in the sd card.

2) as i read in ur threads, some tyms after the procedure is complete, it hangs in the boot up for quite long (more than 15mins),thn sud i jus repeat the procedure again

hey jayce please i need help here.i was trying to install a rom via odin then it all stuck.now my phone doesnt even start up.what should i do?

Greetings Jayce.
I rooted my 2.3.6 again with CFXWKL1,installed TB,I could re-install all apps except 3D Chainfire ,at which the process stopped.My TB version didn’t have green-red colored apps after deselecting from restore batch option(as your demo suggests).Anyways what I want to ask now is-my Market 3.4.4 ver.shows only 6 apps(default apps like Gmail,Search,YouTube etc) in my apps option.It doesn’t display list of over 50 extra apps that I had downloaded from market.This may be because I flashed a stock ROM before in which old market replaced later version.
Can you tell me how can I link all my apps to market for AUTO-UPDATE?because,if apps are not linked to market,they wont update on their own.

jayce cant i use the usb jig please?

Hey ice cream sandwich is almost here. Do I must change the kernel back to original to get the update?

The best guide. Thank you Jayce.

hey jayce,

how u doing… well jayce, i got a small issue with ma sgs2, whn ma battery reaches less than 50%,

the phone goes off, thn whn i power it on, it shows me 20% of battery, n slowly it goes up till say 25%, can u help me in this regards..

thnks…

well my sgs2 is rooted, not official firmware any more i guess, i have even installed the latest check rom couple of times, will try wiping the battery stats again

what rom are u using at present??

xwkk5?? … thts a nice rom .. i tried it .. hw do u lik the battery life

jayce .. is there anyway to add a background on the app drawer in the
rom your using???

yeah, thts rite, wish thr was a way, other than using a different launcher,

neways jayce thnks a lot your halp, as usual ur always appreciated 🙂

do let me knw if nething new comes out 🙂

oh yeah .. 1 more thing , whn is the official ics firmware cuming out ??

Hi Jayce,

I just wanted to ask if rooting your SGS2 will have an effect with the 3G data? I just noticed recently that my phone does not connecting to any data network. But I remembered having the icons on the notification area for the data networks when I first used this phone.

Thanks in advance!

Hai Jayceooi
i got a problem about my CWM manager
I rooted with CF-root v5 and flash checkrom and Neak kernel…

Then when i tried to backup my stuff again for flashing, my cwm manager pop out:
“this version of CWM manager should be used with CF-root v5.0 or newer. It appears you are running a different kernel.Various features have been disabled”

Any cure ?

when i turn it on to root it, it allows me to choose: 1. apply update from sdcard. 2. wipe data/factory reset. 3.wipe cache partition. What should i choose ? Thanks

Hey man , Just rooted my device using Cf-root ……Amazing……….Just wanted to know
How can i unroot it??? Will i loose my settings?? Thx
–

is it possible to brick your phone with cf-root?

nope. 0% chances to brick

help! when i clicked the odin3 the yellow thing on the upper left box didnt appear and when i clicked start, it says ” All threads completed. (succeed 0 / failed 0)” i dont know what to do i kept my phone hanging like this as the fon says do not turn off target!! pls help T_T

Hi.

I’m about to root my sgs2, but i wanted to know, if the root will fail, what problems can it cause?

Thanks,waiting for an awnser 🙂

Btw very nice guide.

Hi
nice& clear guide which I followed stricktly with no problems with XWKJ3 kernel.tar…the last message was: installation complete with no errors but…the sgs2 is not rooted…I’d appreciate your help
thanks
sam

how to remove that yellow traingle please help me

Hi Jayce, Please help me, I have a serious problem,..
I have Galaxy S2 I9100G and I use a wrong files in odin and my phone bricked.
after that I use Odin Oneclick- Downloader … but after a green notification on phone,
the phone turns off and it seems it is dead!
no Icon shows and no response to on or off or download mode or ….
It seems it needs to be flashed but they say that no JTag for I9100G is available.
What I’ve done to my phone, and how it can be fixed?

Jayce……………..need help…..about to root ma phone…….I read in the xda post that we must enable usb debugging first before flashing kernel………..But u havent done here………….Wat should i do???
Thnx

hi jays i try to follow instruction but i dwnlod my version my kernel is 2.6.35.7-I9100jpkg2-cl342890 it means this is the should i dl JP_XSG_KG2 but theres nothing in there only ZImage it doest work there is no excisting file i hope you help me with this my gs2 is so new only 10 days and im kinda boring with theres not too much thing to do so i try to root it … pls reply

Hi jayce,

I have I9100G (unrooted) having sales code JED, when i connect the kies, it says i have XEF sales code,,could u explain me why???

I have updated kies to 2.3,, my mobile information is as below;
PDA: I9100GJPKH8
PHONE: I9100GDZKH5
CSC: I9100GOJPKG7
ANDROID: 2.3.4
BASEBAND: I9100GDZKH5
KERNEL: 2.6.35.7 ROOT@DELL81 #2
BUILD: GINGERBREAD.JPKH8

will i unzip it or not,,,,pls jayce thnks in advance
First of all, you NEED to have ClockWorkMod Recovery (CWM)
If you come from other CM9 based ROM, you dont need to wipe data, otherwise, it’s mandatory.
Download and flash the rom, as usual (I recommend to check MD5 though, just to be sure zip file is ok)
Flash google apps (optional)
Wipe Cache, and Dalvik cache, DON’T WIPE DATA.
Reboot and enjoy your ROM

can give me a much detailed instruction coz i havent done anything yet except for the root now i have cwm and super user and im not on cm9 also just confused …

I want to un root my phone.built no. gingerbread.xwkf3, android version 2.3.3.
So that I doesn’t void my phone’s warrenty

i need you help…

before this i upgrade using odin from 2.3.6 with 4.0.3…(without root)
then i try to root..using odin + DX_XTC_LP7
i already follow the instruction..but it seem i cant find CWM Manager and Superuser.
my phone work pretty normal..nothing change…

sorry for my lack info..what you mean?? isnt all i need is just odin + kernel…?
i thought the procedure is same as install firmware…

hi jayce gs2 is now with check revo thnks ,,, can i just ask a favor i really like rpg game i’ved seen this eternal legacy wtch it on utube its good but i cant install it properly on gs2 even on my hd2 can you help me with ,,, file is downloading but not finish i try it for very long time ..?

Mr Jayce ,Is there any chances that My samsung galaxy S2 can Brick Using this method???
Please Reply..Thanks

Mr jayce for example i have a I9100XWKF1 kernel what Kernel i need?

YO i did it using this method and it worked
NOw for the most important question in this thread:
What’s the music used in your youtube video 😉

How to unroot samsung galaxy s 2

Mr Jayce! I have samsung galaxy s 2 . I live in Russia. I want to select special firmware, but i don’t know how it doing.
My phone information:
model NUMBER: GT-I9100
android version: 2.3.4
firmware version: I9100XXKI1
kernel version 2.6.35.7-I9100XWKI4-CL575468root@DELL143 #2
Build version: GINGERBREAD.XWKI4
!!!!!!!PLEASE HELP ME TO SELECT MY FIRMWARE!!!!!!!!
https://www.jayceooi.com/2011/08/14/how-to-restore-stock-firmware-on-samsung-galaxy-s2-video/ I SAW THIS VIDEO. I DON’T HAVE MICRO USB

GT-I9100_SER_I9100XWKI4_I9100OXEKI1_I9100XXKI1.exe (323.42 MB)
this is my firmware but how it download?
give me please reference on that file

yes, of course. How it download?

XWKI4

Firmware info
PDA:XWKI4
PHONE: XXKI1
Date: 14/09/2011
Android 2.3.4

OXX MultiCSC(AUT, COS, CYO, DNF, EUR, NEE, ODK, ORG, ORS, PAN, SEB, SUN, TDC, TMS, TPH, TRG, VDH, VOM, XEE, XEH, XEO, XEZ, XSK):http://www.multiupload.com/BICMMUFFWF

ATO (Austria): http://www.multiupload.com/6R69F500FQ

DBT (Germany): http://www.multiupload.com/YS0ZU2PAEV

XEU (UK): Download

SMO (Serbia): http://www.multiupload.com/5TYVUHIT8J

CPW (UK): Download

TPH (Portugal): Download

SER (Russia): http://www.multiupload.com/8NUHGOB6RP !!!!!!!!!!! please try to download!!!!!!!

Password: intratech@XDA

окау thank you

THANK YOU WERY MUCH!!!!!!!!
YOU ARE MOBILE PROFESSOR!!!!!!!
THANK))))))

Hi jayce. I have rooted my galaxy s2 before through your help in this forum. I have upgraded my gs2 to ics 4.0 and now, I cannot use the apps that require a rooted phone. MyAndroid version is 4.0.3, baseband version is i9100xxlpr, Kernel ver is 3.0.15-i9100xwlp3- cl287862 dpi@dell168#3, and build number IML74K.XWLP3.. Can you please tell me what to use and the link to download it.I want to root my phone again. thanks so much my friend

is this the right file XW_O2U_LP3?

hi jaycee, how do you manage to back up your phone book and text messages before rooting a phone. Before, i used to back them all via kies, but now kies cannot detect my rooted ICS S2 phone. am just going to back up the contacts and messages. before upgrading again to certain firmware.
What is your recommendation? or alternative apps for back ups.
thanks and regards

Hi Jayce. My phone is upgraded to the latest official firmware in Malaysia; DXLPB. I can’t seem to find the right CF root kernel specifically for DXLPB. it’s not in the download link.
How do I know which file is the closest one to DXLPB, that is safe and will work?

before DXLPB, i was using DXLP9.. DXLPB was just released in Malaysia a few weeks ago. this is the bad part about using stuffs that are too new 🙁
I wonder if the LP9 root kernel works on this firmware.

Hai Jayce..
Need help.. My android version 4.0.3, and I want to root it.. Is it the same way to root ver 4.0.3 and 2.3.4? Thanks a lot.

Hi Jayce,

I CF-rooted my S2 with official firmware (BULPC) using your step-by-step guide. It worked fine. I also installed Triangle-Away.

Now it regularly notifies me that there is a software update (I guess to 4.0.4).
When I accept the update, it does something, reboots, says it is installing the update and then cancels.
The S2 reboots, informs that something went wrong during the upgrade and tells me to contact Samsung support.
The S2 continues to works normal, but it’s still on the same release level.

My question (maybe stupid) is, is this expected behaviour after rooting? Or should I be able to install the official OTA updates?

Thanx for this great site an best regards,
Richard

Hi Jayce,

Thanks for answering, allthough I don’t see your reply here…

Before, I never got Kies to work on my PC (running XP), somehow it never found the S2. So I didn’t try with Kies.

I just downloaded the latest version of Kies and now it worked.

Thanks again, Richard

Hey jayce. Finally fixed my phone. Just flashed with stock rom and it started working. Just wonderig if there was a .root for this kernal “3.0.15-I9100TDULP9-CL422302.dpi@DELL149 #3”. I really know what im doing now.
Thanks in advanced Chris
I can reply at about later.

Hey Jayce. Im trying to root my S2/II with CF-ROOT and my details are from *#1234#*
PDA : I9100TDULP9
PHONE : I9100TDULP4
CSC : I9100TVAULP7
Build Info : Thu Apr 19 20:45:03 KST 2012

I know you dont know much about I9100T models as said here

“Jayce says:
August 8, 2012 at 8:11 am

Sorry Chris, no idea about I9100T. Please consult others with this model at XDA website”.

Just want to ask if these files would be compatible to root my phone found at XDA website by ChainFire.

CF-Root-SGS2_DX_SIN_LP9-v5.4-CWM5 or CF-Root-SGS2_XW_KPN_LP9-v5.4-CWM5.

Would really like to root by tonight.

Thanks in advanced
Chris

hi,i would like to unroot my phone,but i do not know how to do it.

Hey Jayce,
It’s not working for me. Please Help. I’m Newbe!

The Message Box Says:

Added!!
Odin v.3 engine (ID:4)..
File analysis..
SetupConnection..
Can’t open the serial(COM) port.
All threads completed. (succeed 0 / failed 1)

Whats Wrong ??

hy jayce,
i have downgraded from ics 4.0.3 to gingerbread 2.3.6 official samsung firmware that i downloaded from sammobile site.
my mobile details are
Model no – GT-I9100G
Android version – 2.3.6
Baseband version – I9100GDDKI1
Kernel version – 2.6.35.7
root@DELL88 #2
Build no – GINGERBREAD.XWKJ2

which CF root should i use ?

Thanks alot Jayce!
It was fast….Works fine on my S2..

Hey Jayce,

Just have a question, to install cf root on s2 does it have to be v2.3? Because, I have updated my S2 to 4.0 and I can’t find any cf root for the latest version.

Thanks

hi jayce i have this problem of downloading kernel my
android version:2.3.5
baseband version:I9100XXKI3
kernel version:I9100ZSKI3
build number:gingerbread.ZSKI3

so which kernel should i download?

need help ASAP

Hi Jayce, there something i want to know, i have SG2 model GT-I9100G using android 2.3.6. When i check the kernel version it’s say 2.6.35.7 se.infra@SEI-43 #2 .So can I rooted and which Kernel version is matching for my SG2. Please guide N help me.TQ

hi,i have a big problem,i have followed step by step and the odin result is pass,but the problem is i can’t find the new icons of the cwm,but the kernel version has change can u plz help me???

Hi.. I have a question.. If I root my phone, will I’ll be able to update my phone? Now I have version 4.0.3, soon I guess I will have 4.1.

what if i forget to Remove USB cable?? i cant inter my phone

I can’t find the right CF-Root file. My kernel version is 3.0.15-I9100TDULPB-CL710191dpi@DELL154#3. Can you help me. I have android 4.0.3 if that helps. Thanks

I don’t know which one. They’re all zImage

Do i extract it or not. It is also a zImage and is it going in the PDA of Odin3or somewhere else