How to install firmware on Samsung Galaxy S2 with ClockworkMod Recovery? (Video)

How to install firmware on Samsung Galaxy S2 with ClockworkMod Recovery? (Video)

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Every custom firmware for Samsung Galaxy S II should be in ClockworkMod Recovery (CWM) zip format. It is easy to install firmware itself (through SD card), update patches, install mod, backup and restore. Note – install a new firmware will replace your existing firmware. Do a full system backup with CWM first if you wish to go back to the previous firmware.

Prerequisites

  • ClockworkMod Recovery
  • Firmware

In order to install firmware in CWM zip format, you need to have ClockworkMod Recovery on Samsung Galaxy S2 first. Follow this guide to install CWM ~ How to install ClockworkMod Recovery on Samsung Galaxy S2?

Step by Step Guide

  1. First of all, copy the firmware zip file that you want to install into sdcard (internal).
  2. Press and hold down Volume Up + Home + Power buttons at the same time.
  3. Release all buttons when you see SGS2 Logo.
  4. ClockworkMod Recovery will be loaded then.
  5. Select wipe data/factory reset. (You can skip this step if upgrade from same firmware)
  6. Then select Yes — delete all user data.
  7. Select wipe cache partition. (You can skip this step if upgrade from same firmware)
  8. Then select Yes — Wipe Cache.
  9. Go to install zip from sdcard.
  10. Then select choose zip from sdcard.
  11. Select your zip file (VillainROM-2.4.2-signed.zip in my video).
  12. Select Yes – Install your zip file.
  13. Reboot your SGS2.
  14. That’s all.

Enjoy your new installed custom firmware. :D

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  • http://GS2 mazda

    friend if i want to go back to offical rom than what to do…………….????
    plz help

    sry for my english

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  • chetan

    Hi jayce,
    I know this would be silly question. but i m really confused.
    whts the difference between a stock/custom firmware and stock/custom rom….

    • http://www.jayceooi.com Jayce

      ROM == firmware.

  • Oskar

    Hey Jayce, and thank you for all the help. I really appreciate your posts! Anyway, how do I get all my contacts and everything back from after installing a new firmware, for example Cyanogenmod7?

  • Mohd Rizal

    Question to ask.

    What are the difference for flashing via ODIN?

  • eskay11

    hi..tried to install criskelo..follow all instrcutions then when applying update from zip error

    cant’t open /sdcard/su-2.3.1-bin-signed.zip

    pls help…

    • http://www.jayceooi.com Jayce

      Can be the zip file be extracted to PC? Any why do you need to install SuperUser on CriskeloROM? It should have it already…

      • eskay11

        hi jayce..,,r u currently bz?need a reply from you ..if you cant assist further ps let me know as i will seek for alternative ways.

        thanx

        • http://www.jayceooi.com Jayce

          I am still waiting for your reply on my questions above…

  • eskay11

    thanx for prompt reply…

    yes..the zip file can be extracted to pc..

    ive super user jz need to install criskelo rom..pls assist..thanx again

    • http://www.jayceooi.com Jayce

      It should not need to use SuperUser to install CriskeloROM. Who told you that it is needed?

      • eskay11

        owhhhh…may be i done wrong somewhere..mixed up with other threads…

        so what shld i do…ive installed CWM succesfully BTW…

        guidance pls…

        • http://www.jayceooi.com Jayce

          What are you trying do?

          • eskay11

            i wants to install criskelo rom…assist pls,,,..

            • http://www.jayceooi.com Jayce

              Just follow this guide to install. What is the issue that you face?

              • eskay11

                hi jayce…i re-download criskelo rom…follow all steps then the same error occured :-

                cant’t open /sdcard/su-2.3.1-bin-signed.zip

                where did i goes wrong?

                thanx

                • http://www.jayceooi.com Jayce

                  Sorry, I really don’t know why su-2.3.1-bin-signed.zip file is doing here. I don’t use this file when install CriskeloROM.

                  • eskay11

                    this file ive downloaded from your link and i copy it to sd card.file name CRISKELOROMSGSII.V14. is it the correct file ?do i need to extract it first or i lump the whole folder to sd(which i did)

                    thanx

                    • http://www.jayceooi.com Jayce

                      Copy CriskeloRomGSGII.v14.zip to SD card will do. No need to extract.

                    • eskay11

                      Copy CriskeloRomGSGII.v14.zip to SD card will do. No need to extract

                      this is weird …i did as per your instructions..still cant install. any further advise?

                      BTW, my phone info

                      kernel version
                      2.6.35.7 XWKF1

                      ANDROID VERSION
                      2.3.3

                      TQ

  • wni

    hi jayce. if i want to revert the rom back to previous rom (different rom) can i just restore the backup system (CWM) or do i hv to flash the rom again before restore the backup

    • http://www.jayceooi.com Jayce

      Just restore the CWM backup will do.

  • http://www.jayceooi.com Jayce

    @eskay11: Which step did you fail to continue?

  • oscar

    Hello jayce royal mind you are a teacher for all the post it brings over of this terminal mararillosa.
    A question hacerca of this new firmware on having installed it stays in English or gives the option to her change to the Spanish

    • http://www.jayceooi.com Jayce

      Go to Settings. Then Language and keyboard. Click on Select language then. Pick the one that you like.

  • raveen

    Hi Jayce,
    First of all thank you for your wonderful blog. The information is very useful indeed.
    I have just done my first custom rom flash, using your instructions. I first rooted the phone using the appropriate CF-Root file (KH1) then flashed Cognition 1.5.1. I get the yellow triangle, but am fine with that.
    My queries are (aplogies in advance for the long post – I’m a newbie):
    1. When i click on CWM it says “Current Kernel : Unknown” under CWM Manager v2.0. As per About Phone the kernel is 2.6.35.11-ninphetamine-2.1.3+ninpo@titan#26. Is that a problem ? I had installed ROM Manager after flashing. In ROM manager it says that the Flash ClockworldMod Recovery current version is 4.0.1.5. Has installaing ROM Manger caused this issue.
    2. Suppose I do wish to get rid of the yellow triangle, will it have a negative impact if I flash the original Samsung kernel (Kernel_I9100JPKH1) downloaded from XDA to my phone using Odin ? I plan to follow the instructions on your other post to do this (remove the triangle).
    Regards

    • http://www.jayceooi.com Jayce

      1. Unknown kernel in CWM manager should not be an issue. ROM Manger is not working properly with CF-Root. Use CWM Manager instead.
      2. Basically, the guide ask you to install stock kernel to remove yellow triangle. Then reinstall back CF-Root Kernel. So no negative. ;)

      • raveen

        Wow, thanks for the quick reply Jayce. Can I just run the below steps by you before proceeding ?

        1. Uninstall ROM Manager.

        2. Use the steps outlined by you at http://www.jayceooi.com/2011/08/10/how-to-remove-yellow-triangle-on-samsung-galaxy-s2-without-usb-jig-video/ to flash kernel “Kernel_I9100JPKH1″ downloaded from XDA (this matches with my original Samsung ROM).

        3. Then again use the steps outlined by you at the above link to flash CF-Root – “CF-Root-SGS2_XX_OXA_KH1-v4.1-CWM4″.

        Would doing the above steps make the yellow traingle go away without affecting anything else ?
        Is this the correct CF-Root for my phone ? Can’t find anything closer.

        Sorry for the many questions…I’m almost there I think :) Can’t thank you enough.

        Regards

        • http://www.jayceooi.com Jayce

          Look correct. As long as you are following the steps in remove yellow triangle guide, you should be fine.

          You already installed CF-Root XX_OXA_KH, right? If no problem now == no problem later.

  • raveen

    Confused again…:)
    If I flash this CF-Root kernel then the ninphetamine kernel which is part of Cognition 1.5.1 will get overwritten right ? Is that a problem for the new ROM ? Should I flash some ninphetamine kernel instead ?

    Regards

    • http://www.jayceooi.com Jayce

      Arr… I missed that you are using custom firmware Cognition. Then this method to remove yellow triangle is not suitable for you. Get a USB jig. Unless you manage to get ninphetamine kernel zImage to install (it should work I believe). ;)

  • raveen

    Thanks a ton Jayce. Will live with the triangle for now…hopefully will grow fond of it eventually :)

  • FreeStanler

    Hi Jayce

    Besides wiping data and cache beforehand, should one also reset battery stats afterwards?

    • http://www.jayceooi.com Jayce

      I only do so if the battery life is not good.

      • FreeStanler

        Thx!

  • RagingBull

    Jayce, how comes i cannot install rom from sd card? it says failed to verify or someting like that? whats the solution please mate? i was playing around and manage to get lightning rom but i wana change to villian but it just wont load.

    • http://www.jayceooi.com Jayce

      Err… I can’t help much without a clear error message.

      • RagingBull

        Sorry mate, this is what happens, i install rom from sd in rom manager. i get onto android system recovery it says
        installing package..
        opening package…
        verifying package…
        E:failed to verify whole-file signature
        E: signature verification failed

        • http://www.jayceooi.com Jayce

          Use CWM to install. ROM Manager does not work with CF-Root kernel.

          • RagingBull

            Thanks for the replies geez lol. im highly new to this only got a s2 the other day. Where do i get CWM from? haha im laughing at myself for bein sucha noob

            • http://www.jayceooi.com Jayce

              ClockworkMod Recovery (CWM) is already built in Lightning ROM.

              • RagingBull

                CWM doesnt see any files in my external sd card where i have the roms? it says no file found?

                • http://www.jayceooi.com Jayce

                  CWM supports internal sdcard only.

  • joey

    Hi Jayce,
    I copy the zip file from pc to the sd card via an adaptor
    during installation process the zip is not shown on the sd card
    and there is no error msg. what did i do wrong ? or how can
    i resolve this

    • http://www.jayceooi.com Jayce

      Internal sdcard. Not external one.

  • vikram

    hey i jus installed cyanogenmod nd my phone is still reeboting from past 10mins.. i removed the battery nd reinserted it and tried again its d same!! PLZ HELP!!

    • vikram

      and my phone’s a galaxy s2

    • http://www.jayceooi.com Jayce

      How many did you wipe data and cache then install?

      • vikram

        I did not do it as u said i could skip the step!

        • http://www.jayceooi.com Jayce

          That will be the reason then.

          • vikram

            Any ways I panicked nd installed 2.3.4 XXKG6 : P now I should get CMW for dis version now nd den follow the same steps?

            • http://www.jayceooi.com Jayce

              Up to you. ;)

  • azar

    hi jayce i tried to installthe latest firmware 2.3.5 for s2 nd follwed ya steps…it all went smooth untill whn i clicked the zip file..it starts installin but after 2 steps it displays installation aborted…..

  • fx

    hi jayce, i know that the S2 has two SD part, internal and external. so, when selecting wipe data/factory reset, will it delete the data in internal-SD? i am asking because i do not have a micro-sd card (yet), and all my stuffs are in the internal-SD.

    • http://www.jayceooi.com Jayce

      Technically, it won’t touch your internal and external SD card while wiping data and cache in CWM. But no harm to make a backup to PC first. ;)

      • fx

        Ok. I backed up everything using CWM that i got from CF-Root. Gonna copy it to my PC when i get home. Then will start installing custom ROMs. Hehe.

        I’ll see you in another thread. Thanks man!

  • Boy (Malaysia)

    can i use your method to install other rom like galnetmiui

    • http://www.jayceooi.com Jayce

      Yes, as long as they are CWM ROMs.

      • Boy (Malaysia)

        thanx

  • fx

    Jayce, do i need to tick the USB Debugging? what is that for actually?

    • http://www.jayceooi.com Jayce

      I saw several guides mention about ticking USB Debugging during flashing. Actually, it is not required at all in Odin download mode.

      • fx

        I see… ok then. oh ya, i downloaded themes from kitchenpro. it’s a zip file. how do i install that theme?

        • http://www.jayceooi.com Jayce

          I did not try to download theme from there yet. But it should install by itself with CWM. Didn’t it?
          If no, just install it with CWM yourself (I think)… :P

          • fx

            I looked around at xda. Seems a lot of things to do before we can instal the themes downloaded from there.
            Refer to the post by arnoldod at the following thread:
            http://forum.xda-developers.com/showthread.php?p=18706689

            • http://www.jayceooi.com Jayce

              He played with JKay Deluxe Theme also. That’s why so many steps…

              Anyway, always do a CWM backup before install anything new with CWM. :)

  • Jackson

    Jayce,

    1. Does installing roms, mods, themes..etc, add junk files to your internal sd card?
    2. Are there files and folders that can be deleted to clean it up and maybe make phone run better?

    3. Are there certain folders that SHOULD NOT be touched/messed with?

    regards

    • http://www.jayceooi.com Jayce

      1. Depend…
      2. Cleaning it up won’t make it faster (maybe a bit).
      3. Don’t touch any system folders / files if your phone is rooted.

  • Dale

    jayce! its me again.. i have a question again.. on your video it says to wipe the data/factory reset and cache partition…do i have to wipe also the dalvik cache.. ive read a post somewhere to wipe that when installing something via CWM.. what are your thoughts about that? tnx sir.

    • http://www.jayceooi.com Jayce

      Up to you. I seldom (almost never) wipe dalvik cache when install new ROM.

      • Dale

        even when you install checkrom revolutionHD? because that’s im planning to install.. this is my first time to install a rom sir.. i want it to be smooth..i dont want to have problems.. but im confident that it will go smooth.. i will never have problems right? i already told you that im coming from a newly root sgs2 phone using the cf-root guide..xwkf1. tnx sir.

        • http://www.jayceooi.com Jayce

          Yes dear.

          Nothing is always smooth. We learn from mistake. Then we grow… :)

          • Dale

            hehe.. do you got problems with it when you did that? i hope checkrom will be great..because i dont want to change roms often.

            • http://www.jayceooi.com Jayce

              Yes, lot of problems. Don’t install it at all. :P

              • Dale

                are you joking sir? please dont do that.

                • Dale

                  hey jayce! =(

  • Dale

    What??? awww.. how can i change my firmware then? this is sad man.

    • http://www.jayceooi.com Jayce

      Did you read my CheckROM RevolutionHD article?

      • Dale

        im confused now.. you told me earlier not to install it.. is it true? you know, im preparing for it right now..huhu

        • Dale

          hope you could reply sir.. just assure me that this will work..thank you!

          • http://www.jayceooi.com Jayce

            I am still waiting for your answer for my question above…

            • Dale
              • http://www.jayceooi.com Jayce

                Yup…

                • Dale

                  now, can i install checkrom revolutionHD? ur just kiddin about what you said earlier..i’l quote..”Yes, lot of problems. Don’t install it at all. “..right?

                  • http://www.jayceooi.com Jayce

                    After you read CheckROM RevolutionHD article, what do you think? Am I kidding?

                    • Dale

                      don’t get me wrong sir.. i read the article, it seems like there is no problem..but im not referin to the article..im just concern about what you said to me earlier.. no offense sir. i trust this blogsite.

  • http://www.jayceooi.com Jayce

    @Dale: Yes, I was kidding. Didn’t you see this :P
    CheckROM RevolutionHD is still on my SGS2 now. Working great. :D

    • Dale

      Oh thank you sir, im not good at understanding emoticons actually especially that one! hehe.. im about to install the rom.. i’ve read about boot loops..what is that? is it possible that i could encounter that when i install this rom? what should i do if that arise?(hope not.)

      • http://www.jayceooi.com Jayce
        • Dale

          I believe that i won’t encounter boot loop if i follow your guide correctly right? i will not wipe dalvik cache too just as you did. and oh i had questions again, do i really need to backup? i mean i can just download again my application..but it is for the previous firmware that we are backing up right?

          • http://www.jayceooi.com Jayce

            Yup, normally won’t boot loop. Backup is not a must but recommended.

  • Dale

    sir jayce! i have a backup now, use CWM. am i ready to go for checkROM? having a full system backup using CWM is for precautionary measures right, “if” problems arise i can just restore the backup right and its good again? but i believe that there will be no problem..but im just making sure, so i want to know. tnx!

    • http://www.jayceooi.com Jayce

      You can go ahead when you are ready. :)

      • Dale

        Sir Jayce, Im on checkrom revoultion HD now! THANK YOU! hehe! i have the jkay theme already the 12.1 version..but seems like there is no noticeable change. why is that? and what’s the best launcher that i could use to it? tnx!!

        • http://www.jayceooi.com Jayce

          There are several themes with different colour, battery indicator. Depend which one that you installed.
          I prefer the stock TouchWiz Launcher. But you can try others that you like – http://www.jayceooi.com/2011/06/08/top-10-free-android-launcher/

          • Dale

            ahh.. i can use the kitchenpro app to install mods right?

            • http://www.jayceooi.com Jayce

              Yes dear.

  • Dale

    thank you! recommend other roms to me will you? tnx!

    • http://www.jayceooi.com Jayce

      Look around my blog for the ROM that you like…

      • Dale

        sir jayce! i want to install a kernel to my checkromrevoHD.. how can i do that?

        • http://www.jayceooi.com Jayce

          Use KitchenPro to install. Or CWM manually.

  • yuvit

    can anyone help me please?

    I copied the rom file into the sd card from my pc… Then i go to recovery mode I clean my cache and data/factory stuff. After that i go to install zip from sd card and then choose from sd card… except I cant locate my ROM file there (it shows up in the sd card when i connect it to pc so its definitely there) instead i get 15 different folders ‘android’, ‘attachments’…. ‘update.zip’ etc…

    i have tried reformating my sd card a few times and putting the file back on.. but i still end up in the same position everytime..

    can anyone pleeeeeeeeeeeeeeeeease help me??

    • http://www.jayceooi.com Jayce

      Internal sdcard. Not external SD card.

  • HanJi

    I was wondering what custom rom you using right now? Coz I think I found a problem with villainrom 3.0. I can’t use my 3G anymore. I sort of want a rom that is good with battery like villainrom. Doesn’t have to be exactly the same performance. Any recommendations??

    • http://www.jayceooi.com Jayce
      • HanJi

        How do I install it when I have another rom installed? Do I just overwrite it by following this guide or do I have to go back to stock rom and do evrything from the beginning?

        Thanks for your help so far. :)

        • http://www.jayceooi.com Jayce

          Just wipe data and cache with CWM. Install new Android ROM then.

          • HanJi

            Hallo again. I successfully installed the checkrom but still cannot access 3G. I was thinking maybe because my sgs2 was originally branded (but unlocked). It was GT-19100T (Telstra AU) before but now GT-19100 and since then, no 3G.

            Any fix for this? Sorry to keep bothering you but I find your instructions pretty easy to follow.

            • http://www.jayceooi.com Jayce
              • HanJi

                Still not working. Phone can’t even detect 3G signals, when I switch to WCMA only, it would give me some bars but no 3G symbol and when I tried to call, it would say “no mobile network available”. :L

                It wasn’t like this though before I rooted my phone.

                • http://www.jayceooi.com Jayce

                  You might need to restore back to original stock firmware in this case.

  • http://www.starzshowz.com kaizaad kermani

    First of all, copy the firmware zip file that you want to install into sdcard (internal).

    WHERE IS THIS ON MY PHONE OR MMC CARD CAUZ I TRYED IT ON THE PHONE JUST COPYED THE FULL ZIP FILE DO I NEED TO UPZIP IT FIRST OR WHAT.I COULD NOT FIND THE FILE I FOUND TH CM FILE ON MY MMC SD CARD BUT NOT THE VILLIAN ROM

    • HanJi

      No. You put it on the internal memory. Make sure the usb debugging mode (SETTINGS > APPLICATIONS > DEVELOPMENT) is untick in order to put the .ZIP file (NOT unzip) on the root memory. Then follow the instructions on the post.

      • http://www.starzshowz.com kaizaad kermani

        go it yepee thanks hanji works fine now

  • http://www.starzshowz.com kaizaad kermani

    cm_galaxys2att_full-12
    miuiscotland_I9100-1.11.9-ICS

    where do i drop these files in my phone memory in main phone memory or ext sd pls advice

  • HanJi

    Actually I do have 3G but I can only get it when I’m near the city area, meaning my 3G reception/signal is poorer. :(

    By the way, what are the kernels for??

  • http://www.singinghow.com Alii

    Hi, I did as you laid out, now I got a problem.

    I backup my stuffs with titanium backup pro, after doing all that, I tried to download titanium backup but it says error, i dont have enough sufficient space on my device. why is this?

    Sorry I’m very new to this.

    • http://www.jayceooi.com Jayce

      You used up all your disk space so fast? Try to download it again…

      • http://www.singinghow.com Alii

        thats not possible as I dont have much apps too. I kept downloading it. i restart my phone and all. deleted some stuffs. still cant.

        • http://www.jayceooi.com Jayce

          Then your new Android ROM might have Android Market issue.

  • http://www.singinghow.com Alii
    • http://www.jayceooi.com Jayce

      Hmm… CheckROM RevolutionHD should not have issue. Did you wipe data and cache?

      • http://www.singinghow.com Alii

        i did. exactly as u said. except im only using titanium backup. n to restore back i have to dl it again from the market. but i cant seem to install it.

        should i redo the whole process again?

  • http://www.singinghow.com Alii

    I can’t download any other apps. Same error.. Very weird..

    • http://www.singinghow.com Alii

      really hope you can help me on my problem boss. kinda frustrating… not an expert on all this..

    • http://www.jayceooi.com Jayce

      You can try to wipe data and cache. Then reinstall Android ROM again.

      • http://www.singinghow.com Alii

        when i enter clockworkmod recovery, (vol up+power+home buttons) there’s this message:

        ClockworkMod Recover v4.0.0.2
        E:Error in /cache/recovery/log
        (No space left on device)

        • http://www.jayceooi.com Jayce

          Weird… Try to restore back to original stock firmware. Install CF-Root. Then reinstall CheckROM RevolutionHD again.
          http://www.jayceooi.com/2011/08/14/how-to-restore-stock-firmware-on-samsung-galaxy-s2-video/

        • http://www.singinghow.com Alii

          alrite i got it! i got to do the dalvik wipe. then i can start downloading off market! just to let you know what i did. =D

          thanks so much for all the help bro!

          • http://www.jayceooi.com Jayce

            Glad to know that. And thanks for teaching me something new. :)

  • POOKEDANDY

    HI

    Is the Leomar 75 and CheckROM RevolutionHD the same?

    cuz in checkROm Rev. the battery icon at the top right has a number and a logo example
    ( 12% “BATTERY icon”)

    can help me how to make the battery icon like in leomar75?

    thanks

    • http://www.jayceooi.com Jayce

      No. Not sure which battery mod did Leomar75 ROM uses. Maybe it is JKay Theme Deluxe. Please consult Leomar75 ROM chef for detail.

  • Peko

    Hi Jayce.

    Love all of your posts. Any way, I installed CWM (followed the procedures) and then Installed villainROM 2.4.2 via CWM. All went smooth and when rebooting, it shows the warning triangle and after that just shows the “VILLAINROM, FREE YOUR ANDROID” and it stays like that until now. Help?

    • http://www.jayceooi.com Jayce

      Yellow triangle shows up because you install custom kernel like CF-Root. Did you wipe data and cache before install VillainROM?

      • Peko

        Yeah, i finally wiped it clean. But, i checked the response of the villainrom + ninphetamine kernel, its not as fast (compared it to my sister’s basic S2 with 2.3.4 gingerbread). and seems like the reception is less. The proximity light sensor (if you set the auto brightness) is sloww. Have you or anyone else encountered this?

        Any other suggestions on which ROM is better? Seems like the original rom & kernel is better. :s

  • Danial93

    Hey Jayce.
    I just got my s2 and flashed litening rom 6.1 is it safe to flash checkrom revo v4 after flashing litening? Id love a reply. Oh yeah andif you wipe all data doesnt it delete the rom from your sdcard too??

    • http://www.jayceooi.com Jayce

      Yes. Wipe data and cache do not delete content on your sdcard. But no harm to backup to PC first.

  • esyad

    hey jayce..i’ve tried to install miui..but when i go to reboot…it stil can’t ..still have the yellow triangle..and always appear the same..and can’t get through..

    • http://www.jayceooi.com Jayce

      Did you wipe data and cache in CWM?

      • esyad

        yeah…but when i reboot..it still the same..i did a video..can u look through my video…and one things i wanna tell u..i’ve got the stock kernel from the other website..not from xda..because the link is multiupload…

        • http://www.jayceooi.com Jayce

          MIUI ROM has nothing to do with stock kernel. Why do you want to use stock kernel?

          • esyad

            if i want to install miui firmware..i need to root 1st right..when i root at the starting there will be yellow triangle… should i remove yellow…or just go install the miui firmware..

            • http://www.jayceooi.com Jayce

              Use stock kernel to remove yellow triangle before install MIUI ROM. Else use USB jig to remove it after installed MIUI ROM.

  • mieyz

    hi jayce…..wanna ask u again…..

    firmware XXPLH and XXPLB same or not?what difrnce?which one good running?

    • http://www.jayceooi.com Jayce

      Both of them are beta ICS firmware. I did not try them. No idea.

  • Air1ne

    Hi,

    Could you tell me the difference between all the custom firmwares listed? Which one should I use? I’m living in Canada… is there some restrictions? I remember reading somewhere firmware were linked to countries… is it right?

    • http://www.jayceooi.com Jayce

      You can use anyone of it as long as your SGS2 is I9100.

  • Tan Book KOk

    Hi,
    I already copy files miuiandroid_SGS2-2.3.16.zip to my SD card, but why i cant get this files in my CWM based Recovery ?

    • http://www.jayceooi.com Jayce

      Depend on your CWM version. Lower CWM version support internal SD card only.

  • cliff

    Do i need to root first before installing cm9?

    If so, is there a guide?

    • http://www.jayceooi.com Jayce

      No, but you need CWM first (which root your phone also).\

      This is the guide to install custom ROM like CM9 with CWM.

  • Octa

    Hi, Can I install latest ICS for Europe using CWM instead of flashing using ODIN ?

  • Terence Yong

    Hello Jayce. I bought a Samsung S2 GT-I9100G last September and it freezes often. I want to root it but I read that it’s complicated as there are a lot of firmware available. Below are the phone’s specs :

    Android version : GT-I9100G
    Baseband version : I9100GDZKL3
    Kernel Version : 2.6.35.7
    Build Number : GINGERBREAD.DZKL3

    What firmware should i install into my phone so that it’s stable and speedy?

    Thank you

    • http://www.jayceooi.com Jayce

      Hi Terence, I don’t have I9100G model. I have I9100 non G. So I don’t post I9100G related stuffs here.

      FYI, you can’t install I9100 firmware on I9100G. But you can get more information and I9100G firmware at XDA website.
      http://forum.xda-developers.com/forumdisplay.php?f=1550

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  • bebo

    Dear Jayce,

    installed successfully … now i need to return my contacts and other stuff back , but Kies is not recognizing my mobile !!!

    any advice

    • http://www.jayceooi.com Jayce

      Hi bebo, are you using official firmware? Samsung Kies needs that.

      • bebo

        hi jayce , im using the ICS 4.0.4 which u uploaded on other page !!!

        before that i was using ICS 4.0.3 unofficial firmware and it was sync. smoothly and i did take a backup before upgrading .

        what do u think :)

        • http://www.jayceooi.com Jayce

          Sorry bebo, I am not sure which ICS 4.0.4 did you mention. But suspect it is a custom ROM. So Samsung Kies does not support it.

  • Jomuel
    • http://www.jayceooi.com Jayce

      Hi Jomuel, take time to study and understand. Only do it when confident.

  • Jomuel

    sir after i obtaining cyanogen..i don’t have samsung kies or anything left how will i recover my contacts and have google play?

  • Jomuel

    i forgot to flash the Gaps oh please
    what should i do now? :((

    • http://www.jayceooi.com Jayce

      Install Gaps. CM can’t use Samsung Kies.

  • Jomuel

    sir i don’t know that to use because after installing cyanogenmod 9…it can’t read the things in my external sd card. please help me :((

    • http://www.jayceooi.com Jayce

      It maybe located at /mnt/emmc. Try find it see.

  • Jomuel

    should i repeat the process of this one?.http://www.jayceooi.com/2011/08/04/how-to-root-samsung-galaxy-s2-with-cf-root-video/

    i’m really in panic please sir please :( please help me please

    • http://www.jayceooi.com Jayce

      Why do you want to reinstall CF-Root?

  • vertytuk

    Hi Jayce!!! I bough samsung galaxy s 2 for sprint and that guy put icecream rom in and i didnt like it and my friend tried put back to normal firmware and phone just crash. its not turning on when you turn on its says downloading and standing like that until battery die and i press volume up home and power same time its says some error and press volume up to continue or volume down to cancel if you prees up its going back to downloading. Help???

    • http://www.jayceooi.com Jayce

      Did your friend install the correct firmware for your Sprint SGS2? Note – you can’t use I9100 firmware on your SGS2.

  • Praveen

    Hi Jayce,

    My name is Andy from India n i have rooted my sgs2 with 4.0.4 and baseband version is now I9100XXLQ5……… Facing problem that videos are not playing and few pics are not getting open…?

    Should i try CBR Android 4.0.4 ? but i am not able to find ClockworkMod for this baseband version.

    • http://www.jayceooi.com Jayce

      Hi Praveen, you can install other firmware with Odin. Or install CWM. Then install CBR.

  • Praveen

    Should i install this “I9100GXXLPQ” again coz it was my precious version.. ?

    • http://www.jayceooi.com Jayce

      Totally up to you. ;)

  • Praveen

    Okay so there is NO prob if i m moving to lower version from upper version..? But i am not able to find CWR for I9100GXXLPQ ?

    • http://www.jayceooi.com Jayce

      You might need to wipe data and cache in recovery when downgrade.

      Wait… Your previous firmware is I9100G firmware?

  • Praveen

    no just I9100LKAINU

  • Lenard Hogan

    Is there a way to turn a galaxy s 2 into the galaxy s 3??

    • http://www.jayceooi.com Jayce

      Sorry Lenard, nope.

  • tonakis

    Hi Jayce,

    I`ve just installed MIUI 4.0.3 on SGS2. So far, so good – looks nice :)
    But, now I want to perform restore of my old settings – accounts, contacts, apps etc. via Titanium Backup Pro. But when I try to install TB it says that needs root permission. Should I root my phone again? Isn`t it the custom kernel already rooted? Any ideas ?

    • http://www.jayceooi.com Jayce

      Yes, most custom ROM has root access already. However, some don’t.

  • tonakis

    So, apparently the latest MIUI does not have root access. So, would you suggest me which way to use in order to root it ?

    • http://www.jayceooi.com Jayce

      Get a rooted MIUI ROM is easier.

      • tonakis

        Can you suggest any?

        • tonakis

          Where can I find such rom? And how can I understand that it is rooted ? Do you have any links ? Pls

  • tonakis

    Jayce, can you tell me how to root it now with MIUI 4.0.3? Is it the same way as the stock firmware ?

    • http://www.jayceooi.com Jayce

      No, MIUI is not same as Samsung firmware. Can’t use CF-Root.

  • tonakis

    It says that my kernel is XXKL1 – there is no such version CF-Root, right ? So now how am I going to root it ? Even if I wanna go back and reverse the upgrade to my previous ( NOT original ) firmware I cannot do it, because I do not have root to use CWM or TB ? So, no what, any ideas ?

    • http://www.jayceooi.com Jayce

      Boot into CWM.

      • tonakis

        After booting, how to proceed with the restore – wipe data/factory reset –> wipe cache –> restore OR to go directly to restore?

        • http://www.jayceooi.com Jayce

          Restore directly.

  • andres

    hello jayce, before I had a htc hd2 but now I have a samsung galaxy s2, where to begin to change roms. and if used well the CWM. I’m from south america

    • http://www.jayceooi.com Jayce

      Hi andres, you can find some in my blog. And lot more at XDA website.

  • Rookie

    Hey, my phone is not rooted can I still flash my ROM?

  • Rookie

    Could you tell me where can I find new and reliable official non rooted rom ?
    Thank you so much for your answers.

  • Mohit Manocha

    Hey

    I am tryin to flash Ressurection Remix 3.1.2 on My S2 I9100 using CWM. After following all the steps as mentioned when i try to install zip file from sd card it throws back an error message
    can’t open “name of the zipfile”.zip

    Installation Aborted.

    Please let me know if there are preferences or settings changes that are needed to be made.

    I am currently running on ICS 4.0.4 Kernel Siyah v5.0.1 for S2.

    Thanks in Advance

    • http://www.jayceooi.com Jayce

      Hi Mohit, suspect your zip file has issue. Redownload it again see.