Si is it this easy to Unroot and Update to ICS? - Galaxy S II Q&A, Help & Troubleshooting

Hi, I just bought myself a Samsung Galaxy S2, specifically Gt-I9100M.
I am on the old Gingerbread software, and my phone is currently in a Stock and ROOTED Bell ROM I believe(I got Superuser).
I want to upgrade to ICS, and could you please tell me if following this extremely simple guide will work? galaxys2root.com/galaxy-s2-unroot/how-to-unrootunbrick-your-galaxy-s2-i9100-ics/
screenshot added.

To unroot, you need to flash the original kernel ugkg2. However, to flash it, you need to do it through Odin. Then, why flash the kernel only when you can flash the full ics firmware instead.
My suggestion, flash the full firmware instead. It's going to be quicker.
If you don't know Odin, read read and read again before doing anything. This forum is your friend.

urself25 said:
To unroot, you need to flash the original kernel ugkg2. However, to flash it, you need to do it through Odin. Then, why flash the kernel only when you can flash the full ics firmware instead.
My suggestion, flash the full firmware instead. It's going to be quicker.
If you don't know Odin, read read and read again before doing anything. This forum is your friend.
Click to expand...
Click to collapse
So you are saying just follow the guide I put in the link and I should be fine? NOthing else to do?

Your link make it seem simple but itcould turn into a nightmare if you don't know what to do. Read the forum on how to use odin and what not to do and you should be fine.

Anyone?
Sent from my GT-I9100M using Tapatalk 2

urself25 said:
Your link make it seem simple but itcould turn into a nightmare if you don't know what to do. Read the forum on how to use odin and what not to do and you should be fine.
Click to expand...
Click to collapse
Thanks a lot for posting a reply, but based on what the guide said and what you saw my phone has, should I be fine by just using the guide? I read the forum btw about odin.
Sent from my GT-I9100M using Tapatalk 2

Please someone help
Sent from my GT-I9100M using Tapatalk 2

You can use the guide, but dont use the stock rom attached. Use the one for the i9100M found at sammobile.com. Just search for the i9100M rom.

Kaze105 said:
You can use the guide, but dont use the stock rom attached. Use the one for the i9100M found at sammobile.com. Just search for the i9100M rom.
Click to expand...
Click to collapse
Thanks for the info!! I found many links in the sammobile webpage. Can you tell me which one to pick from that list? I looked up i9100m and there was a 4.0.3 Firmware from my carrier there(bell). Should I just download that rom, follow the guide from the link and just do what it says, I dont have to do anything else?
I know Im annoying, but Im new here
Sent from my GT-I9100M using Tapatalk 2

FromiOSToAndroid said:
Thanks for the info!! I found many links in the sammobile webpage. Can you tell me which one to pick from that list? I looked up i9100m and there was a 4.0.3 Firmware from my carrier there(bell). Should I just download that rom, follow the guide from the link and just do what it says, I dont have to do anything else?
I know Im annoying, but Im new here
Sent from my GT-I9100M using Tapatalk 2
Click to expand...
Click to collapse
Download the one for your carrier and follow the guide as said. It will install stock ICS (no root). Just in case though, I suggest you backup your data on your phone to your computer or such.

The one for our phone is UGLD3. Download it. Download also UGKG2 just in case something happen with the installation. When I tried to update my phone I had a Kernel Upload Panic Mode error. I had to reinstall UGKG2 to make my phone work again.

urself25 said:
The one for our phone is UGLD3. Download it. Download also UGKG2 just in case something happen with the installation. When I tried to update my phone I had a Kernel Upload Panic Mode error. I had to reinstall UGKG2 to make my phone work again.
Click to expand...
Click to collapse
Just saw my friend updating his sgs2, IT WAS A NIGHTMARE!! ICS was not stable enough, some apps wont even work, basically VERY minor things changed, in short ICS was a disaster for the SGS2.
Do you or anyone know a way to backup my Gingerbread SGS2 in a way so that I can use that backup in case of an emergency?
Sent from my GT-I9100M using Tapatalk 2

FromiOSToAndroid said:
Do you or anyone know a way to backup my Gingerbread SGS2 in a way so that I can use that backup in case of an emergency?
Click to expand...
Click to collapse
As I said, download UGKG2, which is gingerbread. If anything happen, just reinstall it using ODIN. had a bad install with ICS at first and I just reinstalled UGKG2 and all my apps and setting were still there once I reinstalled UGKG2.

Related

how to reinstall firmware using kies

is it possible to reinstall the latest firmware with kies?
I update twice as it advised me to do but since then i seem to be getting problems. phone is heating up badly and whenever it has been turned off and i switch it back on i get an error message saying 'com.android could not be started etc and then it asks me to force close the app.
I want to re run the latest firmware but dont know how to.
ps. i have tried a master reset already and still has the same problem.
advice please
hpsauce37 said:
is it possible to reinstall the latest firmware with kies?
I update twice as it advised me to do but since then i seem to be getting problems. phone is heating up badly and whenever it has been turned off and i switch it back on i get an error message saying 'com.android could not be started etc and then it asks me to force close the app.
I want to re run the latest firmware but dont know how to.
ps. i have tried a master reset already and still has the same problem.
advice please
Click to expand...
Click to collapse
Don't use Kies, use Odin, it's far less temperamental. Just download th XWKE2 firmware from samfirmware.com and flash in the PDA section of Odin
101matt101 said:
Don't use Kies, use Odin, it's far less temperamental. Just download th XWKE2 firmware from samfirmware.com and flash in the PDA section of Odin
Click to expand...
Click to collapse
i have downloaded odin but using the links for latest firmware it says its going to take a day lol!
anyone got anywhere else i can get it from
hpsauce37 said:
i have downloaded odin but using the links for latest firmware it says its going to take a day lol!
anyone got anywhere else i can get it from
Click to expand...
Click to collapse
Wow, that's a hell of a long time, leave it to download overnight? Mine took a while but only because it's a big file and it certainly didn't take a day! I'm sorry I don't know anywhere else to get stock firmware from apart from Samfirmware.com and the god awful Kies...
Its not posted on here by any chance using a different upload service .
jje
I have installed an unsecure kernel in my galaxy s2 (GT I9100G) but since I cannot find the original stock kernel, I wanted to roll back to the stock android version that came with s2 and thus wanted to know how could I re-install the firmware from KIES.
Thanks
Perryb said:
I have installed an unsecure kernel in my galaxy s2 (GT I9100G) but since I cannot find the original stock kernel, I wanted to roll back to the stock android version that came with s2 and thus wanted to know how could I re-install the firmware from KIES.
Thanks
Click to expand...
Click to collapse
You need to reflash stock using ODIN before you can use kies, as Kies doesn't recognise custom kernels.
Ricey
ricey1986 said:
You need to reflash stock using ODIN before you can use kies, as Kies doesn't recognise custom kernels.
Ricey
Click to expand...
Click to collapse
Will reflashing bring back the stock kernel and make the phone unrooted in short make it the way Samsung sold it to me?
Also, I am using Galaxy S2 I9100G build number GINGERBREAD.XWKJ2 and for it only 1 unsecured kernel was available at this thread - http://forum.xda-developers.com/showthread.php?t=1327509
I rooted my phone without any problem but since there's no way to get back the stock kernel, I am afraid that if need be, how am I gonna claim warranty for my device.
Perryb said:
Will reflashing bring back the stock kernel and make the phone unrooted in short make it the way Samsung sold it to me?
Also, I am using Galaxy S2 I9100G build number GINGERBREAD.XWKJ2 and for it only 1 unsecured kernel was available at this thread - http://forum.xda-developers.com/showthread.php?t=1327509
I rooted my phone without any problem but since there's no way to get back the stock kernel, I am afraid that if need be, how am I gonna claim warranty for my device.
Click to expand...
Click to collapse
Yes aslong as you flash the firmware that came with it t will be like as samsung sold it. Have a look at intratech's thread he may just have the kernel if you still have the original firmware on it already.
Ricey
ricey1986 said:
Yes aslong as you flash the firmware that came with it t will be like as samsung sold it. Have a look at intratech's thread he may just have the kernel if you still have the original firmware on it already.
Ricey
Click to expand...
Click to collapse
Yes, I do have the original firmware on it. Didn't have enough guts to play with custom ROM :/
I did check intratech's thread and found stock kernel for XWKJ2 but the thread titles says "Official i9100 Firmwares" whereas my phone shows i9100G. I guess this won't work.
And, when flashing to original firmware, will the kernel's be replaced to the original one's as well?
Thanks for suck quick replies Am just a n00b diving into Android
You can extract the original kernel yourself if you want it http://www.hotfile.com/dl/136857418/c144909/I9100GXWKJ2_I9100GODDKJ2_INU.zip.html
oinkylicious said:
You can extract the original kernel yourself if you want it [Link]
Click to expand...
Click to collapse
Downloaded it. Now what do I do? Flash s2 with this, backup using titanium, root device and then use the stock to get rid of yellow triangle? Am I missing anything?
Thanks for your help
BTW, is there a way to get the latest available firmware in my country/region via KIES so that I can be 100% sure of being in right place
i cant post the link right now but you can google
"How to goback/use Kies update after using ODIN,Rooting or Custom Firmware : Video Guide"
and go the the dialandroid website they have a way to make it like original again

Back to stock galaxy s2

Hello how i can back to stock my galaxy s2? i rooted and put checkrom works nice but i want to learn how get back to stock again im confused
I didnt wrote down the pda version and kernel before install checkrom and rooted what recommend me to do?
thanks.
Just flash official firmware package from Intratech's XDA firmware thread via Odin.
Use your Product Code (sometimes found on your box) on the Chek Fus Download website to find your original PDA etc (if you're not 100% sure) or search the first couple thread posts for match.
Follow his flash instructions and you're done
Sent from my GT-I9100 using xda premium
alexistkd said:
Hello how i can back to stock my galaxy s2? i rooted and put checkrom works nice but i want to learn how get back to stock again im confused
I didnt wrote down the pda version and kernel before install checkrom and rooted what recommend me to do?
thanks.
Click to expand...
Click to collapse
you can get your stock firmware from here
http://forum.xda-developers.com/showthread.php?t=1075278
It also includes instructions of using odin and flashing the downloaded firmware .... if you are rooted take a nandroid backup every time you flash custom from stock ........ that ways you'll always have a backup of the stock firmware ......
Yep, my post is rather incomplete, forgot to add the link cheers
Sent from my GT-I9100 using xda premium
So I just came across this and got to this link http://forum.xda-developers.com/showthread.php?t=1075278 however, I am SO lost. I don't know what firmware I'm supposed to download. Yes I'm a noob, but seriously trying to figure all of this out so help is greatly appreciated. OH and I'm trying to get back to stock in attempts to get CF root to hopefully get cyanogenmod to install rather than abort the installation.
rististien said:
So I just came across this and got to this link http://forum.xda-developers.com/showthread.php?t=1075278 however, I am SO lost. I don't know what firmware I'm supposed to download. Yes I'm a noob, but seriously trying to figure all of this out so help is greatly appreciated. OH and I'm trying to get back to stock in attempts to get CF root to hopefully get cyanogenmod to install rather than abort the installation.
Click to expand...
Click to collapse
Actually all the firmwares provided in the thread are stock ..........
If you are a Noob i would not recommend cyanogenmod though it is pretty good but i've heard it's for advanced users and stuff ........ why do you need to flash stock is my primary question ........... use this thread only http://forum.xda-developers.com/showthread.php?t=1075278
You need to update latest firmware for your region as a KIES update is there / on the way?
Find out the latest firmware for your region to flash via http://fus.nanzen.se/ it will provide you with the stock firmware your phone should have after selecting the specific region.
You need to update latest firmware irrespective of region (like Me)
Just download the latest firmware available in the 2nd or 3rd section of the thread. in this case 2.3.6 (KK2 or KK5).
In case of any more issues post back.
so I tried kk2 and kk5 and kk2 gave me no service, and kk5 failed to even install. I'm at a loss. I really want CF root, but can't install it on the stock eg30 that I've been using as my stock rom. SO what next? Any other way to figure out which stock firmware from that link will work for my phone?
hello???
Is there anyone who can help me figure this out?????

Uninstall ics 4.0.3 galaxy s2

HI GUYS,.
I NEED A tutorial how to remove ics and return gingerbrean.
Use Odin to flash back to stock. Then flash a cf root kernel.
Sent from my GT-I9100 using xda premium
Yeisonp said:
HI GUYS,.
I NEED A tutorial how to remove ics and return gingerbrean.
Click to expand...
Click to collapse
Firstly, this is a dev forum, Does it resemble absolutely anything like a Q&A or general forum or even a forum you should be creating a topic in?
Second, There is an abundance of data on how to flash, go check stickies etc. If you have flashed ICS then you can flash GB, its the exact same process.
thanks for your responses.
im from colombia, and my english is poor
restore your backup if you made one!!
wipe data/cache/dalvic/ restore
Just reboot in recovery, wipe everything. If you have a rom on your sdcard just flash it. If not use the restore method if you have a backup. Simple as that
Sent from my GT-I9100 using xda premium
Install Kernel CF-Root, install rom from SDCard or Install Stock rom from ODIN
Instal stock rom first to back your modem version , then you can back your last backup
Sent from my GT-I9100 using XDA App
I'd like the same
Could anyone offer me a link to a gingerbread stock rom. It might be the only way of getting my phone to work properly.
I have a UK unbranded GS2. In case it changes anything.
Thank you
http://forum.xda-developers.com/showthread.php?t=1113928
Search here
pope2141 said:
Could anyone offer me a link to a gingerbread stock rom. It might be the only way of getting my phone to work properly.
I have a UK unbranded GS2. In case it changes anything.
Thank you
Click to expand...
Click to collapse
You'll find all stock ROM's at sammobile.com
Chris.
Thank you. However I am after an unbranded stock Gingerbread.
Any ideas?
pope2141 said:
Thank you. However I am after an unbranded stock Gingerbread.
Any ideas?
Click to expand...
Click to collapse
http://hotfile.com/dl/146321681/7a0247f/I9100XXKL1_I9100OXAKL1_OXA.zip.html
Open europe version
pope2141 said:
Thank you. However I am after an unbranded stock Gingerbread.
Any ideas?
Click to expand...
Click to collapse
Did you even go to the website he suggested? There are dozens of unbranded stock Gingerbread firmwares for the i9100 there.

My tab wont unroot?

Hey guys.
im currently about to sell my gtab, and im trying to get it bk to stock unrooted.
now, i tried to install the latest UK firmware, which is: P7510XXKL2 and i downloaded it through sammobile and flashed through odin, but every time i tried to flash it through odin i got bootloop.
So in the end i downloaded :http://forum.xda-developers.com/showthread.php?t=1412601 and flashed that. But now i want to unroot it... is that possible, if so, what should i do?
thanks
Adam.
Use Supersu app from play store. There is an unrooting guide somewhere here also. Search!! And don't post questions here! (in no way am I a moderator, but the rules clearly state: questions to Q and A)
Sent from my amazing 10.1 galaxy tab
To UNroot or Not..
Any stockrom flash with PC odin will bring it back to a fresh Unrooted TAB..
Download the rom again, maybe it is damaged?
remove the MD5 extension and just flash the tar...
adamski123 said:
Hey guys.
im currently about to sell my gtab, and im trying to get it bk to stock unrooted.
now, i tried to install the latest UK firmware, which is: P7510XXKL2 and i downloaded it through sammobile and flashed through odin, but every time i tried to flash it through odin i got bootloop.
So in the end i downloaded :http://forum.xda-developers.com/showthread.php?t=1412601 and flashed that. But now i want to unroot it... is that possible, if so, what should i do?
thanks
Adam.
Click to expand...
Click to collapse
oh, that is no biggey. once you are done flashing, get into recovery mode and do a factory data reset. that should fix the issues. how ever, make sure that you have got a SUCCESSFUL flash with odin and no corrupted files. if that is the case, do a fresh download from samfirmware.
You have to first repartition your Tab besides flashing the stock Rom....
See this Post and follow the link Given in it....
noob1995 said:
You have to first repartition your Tab besides flashing the stock Rom....
See this Post and follow the link Given in it....
Click to expand...
Click to collapse
Ignore this. This is in no way true. Btw, wrong section
Uuuuhhh..
KonstantinKeller said:
Ignore this. This is in no way true. Btw, wrong section
Click to expand...
Click to collapse
So please explain, what is true or not...
For the record this should be in the Q&A section OP.
You're unrooting difficulties are probably related to the fact that you shouldn't sell you tab
Sent from my EVO using xda premium
Questions go in the Q&A section

Phone not booting up

Hi,
I have a problem. I did a factory data reset and and phone is not booting more than Samsung Galaxy S II i9100 screen after that phone shuts off. I can get to Download Mode and from here I need further directions what to do.
Thanks.
Fox05 said:
Hi,
I have a problem. I did a factory data reset and and phone is not booting more than Samsung Galaxy S II i9100 screen after that phone shuts off. I can get to Download Mode and from here I need further directions what to do.
Thanks.
Click to expand...
Click to collapse
Search the forum for the answer this is a common problem. You will need Odin. Since you have bricked your phone install a custom Rom and Kernel. You will not go back to stock!!
Originally Posted by Fox05
Hi,
I have a problem. I did a factory data reset and and phone is not booting more than Samsung Galaxy S II i9100 screen after that phone shuts off. I can get to Download Mode and from here I need further directions what to do.
Thanks.
Click to expand...
Click to collapse
Search the forum for the answer this is a common problem. You will need Odin. Since you have bricked your phone install a custom Rom and Kernel. You will not go back to stock!!
Click to expand...
Click to collapse
Ok, but I wanted to know if I have to flash one file ROM or 3 file ROM?
bahmonkeys said:
Search the forum for the answer this is a common problem. You will need Odin. Since you have bricked your phone install a custom Rom and Kernel. You will not go back to stock!!
Click to expand...
Click to collapse
Ok, but I wanted to know if I have to flash one file ROM or 3 file from?
Fox05 said:
Ok, but I wanted to know if I have to flash one file ROM or 3 file from?
Click to expand...
Click to collapse
Well im guessing your phone is not backed up!? What do you want to do stay on a stock Rom or Custom Rom?
Fox05 said:
Ok, but I wanted to know if I have to flash one file ROM or 3 file from?
Click to expand...
Click to collapse
I have attached the odin file for you
What firmware was you using when this happened. You've sounds like it's recoverable. If download mode is all you can get your probably get best results by downloading official firmware from Sam firmware and extracting it then flashing the zip file in odin via PDA section. All the best.
Sent from my GT-I9100 using xda premium
HANDSY said:
What firmware was you using when this happened. You've sounds like it's recoverable. If download mode is all you can get your probably get best results by downloading official firmware from Sam firmware and extracting it then flashing the zip file in odin via PDA section. All the best.
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
I don't remember exactly my firmware but it was 4.0.3 and I haven't installed 4.0.4 but I did have CM10 just before I did restore from CWM and now I did factory data reset, this happened.
I prefer stock ROM, but I don't mind custom ROM either as long as I can get back to stock ROM
Fox05 said:
I don't remember exactly my firmware but it was 4.0.3 and I haven't installed 4.0.4 but I did have CM10 just before I did restore from CWM and now I did factory data reset, this happened.
I prefer stock ROM but I don't mind custom ROM either as long as I can get back to stock ROM
Click to expand...
Click to collapse
Flash a stock Rom via Odin. Wait till your phone boots up. Go back to Odin install a custom kernel (i recommend siyah kernel). Backup your stock Rom, then install a custom Rom. There is a lot of tutorials to tell you exactly how to do this process. If you need help at any point of this process just send me a message and I will give you a detailed walkthrough. You should be fine though!!
Goodluck
bahmonkeys said:
Flash a stock Rom via Odin. Wait till your phone boots up. Go back to Odin install a custom kernel (i recommend siyah kernel). Backup your stock Rom, then install a custom Rom. There is a lot of tutorials to tell you exactly how to do this process. If you need help at any point of this process just send me a message and I will give you a detailed walkthrough. You should be fine though!!
Goodluck
Click to expand...
Click to collapse
Before I did have Siyah Kernel, but it was older version. Do you have any suggestions which firmware I should flash?
If you want stock then take your pick from stock firmware at samfirmware. Aviod the ones with the red warning triangles, risk of brick bug!
Sent from my GT-I9100 using xda premium
HANDSY said:
If you want stock then take your pick from stock firmware at samfirmware. Aviod the ones with the red warning triangles, risk of brick bug!
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
How about from the intratech's thread? And is the Odin flash failing risk big with the situation I have right now?
I've used odin A LOT and never had a problem. I only ever use the PDA section and never touch anything else because I don't understand it. I can't comment on intratechs thread as I've never used his software. Any custom ROMs are normally flashed via CWM.
Sent from my GT-I9100 using xda premium
HANDSY said:
I've used odin A LOT and never had a problem. I only ever use the PDA section and never touch anything else because I don't understand it. I can't comment on intratechs thread as I've never used his software. Any custom ROMs are normally flashed via CWM.
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
I have used Odin too and I have only used intratech's ROMs. But nothing ever has happened like my phone's not booting up so I'm little more nervous. But thanks I'll try.
Thanks all! I got it working

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