Rooting Galaxy S2 - Dummies Guide

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  1. JohnSGS215

    JohnSGS215 Member

    Thanks for your help ironass. But the are two kind of kernel 200mhz and 300mhz, which kind should I choose and what are the differences? And also what are rom? Do I have to use a custom rom or can I just stick to the original rom?

  2. ironass

    ironass Well-Known Member

    I do not own the, "G", variant and so therefore you have reached the limit of my knowledge on the subject.

    Can I suggest re-posting that question on the i9100G thread as they will be up to speed.
    JohnSGS215 likes this.
  3. jsimp1994

    jsimp1994 New Member

    hey i cant find a tar file for my galaxy s2 4g on telstra in australia? my current kernal version is i run andriod version 2.3.6 and my base band version is U9210TDVLD1 can someone please help me? i want to root my phone but am new to this so i need it for dummies
  4. jsimp1994

    jsimp1994 New Member

  5. Slug

    Slug Check six! Moderator

    The Galaxy S2 4G (GT-i9210T) is similar in hardware specs to the AT&T Galaxy S2 Skyrocket. Firmwares differ but the rooting procedure is compatible afaik.

    Thanks once again to Samsung and the carriers for thoroughly confusing the issue. :(
    ironass likes this.
  6. 1981

    1981 Well-Known Member

    thank you guys.
    finallyyy FLASHED to LPG via Odin yesterday and ROOTED my S2 today(first timer :) ). wat a relief. had never thought of such procedures during the last 8months of having the S2. it really was a smooth process with the help of Ironass guides.
    now I would like to clarify few things before getting deeper into the stuff. plz advise.

    1- i have done nandroid backup(through recovery mode). is this procedure exactly the same as doing backup from within the CWM app? I understand this a 'system restore' thingy. wat is the scenario that this backup should have to be restored again? if I FLASH different ROMS and then do this nandroid restore while using someother ROM, would it delete all that and take me back to right where I am now?

    2- next about the Titanium backup. I have bought the Pro version. just update all apps and data using that, rite

    3- before proceding to the ROM flashing procedures, is there something that should necessarily be done? in case something goes wrong

    4- ROOT EXPLORER app itself should be installed? or apps like androzip and astro would do the same work?

    5- USB debugging mode should be always enabled after ROOTING is done?

    6- Odin Ver 1.85 and ver 3.04. I saw these versions, but Ironass guide says v1.85. is that a better one?

    7- the 'TRIANLE AWAY' app, should it be installed now, or sometime later, when in need of warranty again?
    thank you all. cheers....
  7. Hawker

    Hawker Well-Known Member

    1. a CWM (or nandroid) backup is a complete snapshot of your current system barring the modem. whatever you do to your device in terms of roms, apps, data etc, restoring it will return you to the state your phone was at the time of taking the backup. What scenario to restore????? if you dont like your current setup/rom, if your device wont boot, if you lose your status bar, the list is endless.

    2. just use it to back up your user apps+data, and possibly some selected system apps (mostly data only). Dont restore system apps/data between firmware versions as this may cause FC's

    3. Before flashing a new rom, take a CWM backup then format /system and factory reset (or run my Nuke script. I see you have already read my full wipe thread so that pretty much sums it up.

    4. use ES file explorer

    5. No, it doesnt matter.

    6. You can use either. 3.04 can also be used on the GS3

    7. Install it if you want, or get a USB Jig off eBay.
    ironass likes this.
  8. gt12

    gt12 New Member

    I followed Rooting Galaxy S2 - A Dummies Guide, used the LPB Kernal. I am running ICS. ODIN told me I PASSED and the root looked successfull but now the Galaxy S2 wont reboot. I can go to download mode but I cant reboot the phone. when I try I get the yellow triangle and then screen goes black. PLEASE HELP. I have searched threads for an answer but can
  9. Hawker

    Hawker Well-Known Member

    try booting up into CWM recovery, format cache and dalvik cache and fix permissions
    if still no joy, try flashing another kernel
  10. gt12

    gt12 New Member

    Not quite sure how to deal with CWM recovery as I did not install it on my phone before i tried the root (no excuse there). As for other Kernals, I tried one other and same result. Not too sure about trying one that doesnt match the stock kernal i replaced?? I have read in other threads about reflashing a stock kernal. Any other ideas??
  11. Hawker

    Hawker Well-Known Member

    By virtue of the fact you followed this guide (presumably) you will have CWM recovery on your phone
    gt12 likes this.
  12. gt12

    gt12 New Member

    Thanks. see that now. Appreciate your patience. Fixing permissions now. by format dalvik catch do yu mean to wipe it? also, where do I see the option to format cache (non dalvik) (is it wipe cache partition)??? thanks

    wiped cache + wiped Dalvik cache + fixed permissions = No Joy - still only get yellow triangle and device name on boot up. Any suggestions on other Kernal??? I am on I9100BVLPB (Orange Spain). Help :-(
  13. gt12

    gt12 New Member

    Anyway... in case anyone is interested... I found the next closest kernal (LPD from LPB) reflashed with Odin and now it works fine. Hawkers advise was sparse - but on the money.
  14. ironass

    ironass Well-Known Member

    What more do you want? ;)

    You think that's sparse!!!

    Last time Hawker bought a drink was the Queen's Jubilee...

    Victoria, that is! :rofl:
  15. Hawker

    Hawker Well-Known Member

    You should know mate. You were the moany old bar steward who asked for my ID before serving me!
  16. ironass

    ironass Well-Known Member

    Only to see if you were entitled to the Pensioners discount... and you were! ;)
  17. Hawker

    Hawker Well-Known Member

    That must be a discretion exclusive to Cotswolds drinking establishments.
    No wonder you spend so much time "modem testing" in the Twilight Zone you penny-pinching alchy!!!
  18. 1981

    1981 Well-Known Member

    Hi, I have a small confusion. Recently I rooted my S2 for the first time after flashing the stock LPG firmware. Using the CF root file attached along with the LPG firmware in an XDA thread. After that I noticed the CWM app in the app manager. But now after flashing the RESURRECTION REMIX 2.2 ROM, this CWM app is not seen in the app drawer. But I still have root.
    Wat must have happened.
    Should I re flash the CF root file once again to get that CWM app in the app drawer again.
    Since I am using the resurrection remix ROM now, flashing the CF root file of LPG could be done or avoided? Please advise.thank you.
  19. ironass

    ironass Well-Known Member

    It is possible to lose root when flashing ROM's.

    To check that you still have root you can install Root Checker Basic, see post #2.

    To obtain CWM, just re-root using a compatible CF-Root kernel as per post #1.
  20. 1981

    1981 Well-Known Member

    Yes I used the app, root checker basic, and it says its rooted.
    By compatible CF root kernel, Wat did u mean. The kernel of the custom ROM I am currently using?
    Or the kernel of the LPG stock firmware which I used, for rooting the first time?
  21. ironass

    ironass Well-Known Member

    Whatever version you are on now. as per post #1.
  22. compmanir

    compmanir Member

    After searching for 3 days in the net and reading all the guides about rooting Samsung Galaxy S2, I found this guide, and it is realy simple, complete and fool proof , This is guys like ironass who make life so much easier for the likes of me, Thank You Buddy.
  23. compmanir

    compmanir Member

    Hey everybody, I just rooted my 3 (Yes, Three) days old Samsung Galaxy S2, with the help of this guide, all the process from the moment i hit the Start key to the moment that my phone restarted and it wrote "Passed", just toke about 5 to 10 seconds, it is the most straight forward way to root SGS2, Thanks to ChainFire for his work and Ironass for this helpful guide, now i am going to part 2, factory reset, clean everything, nandroid backup, and then a new ROM,
  24. ares05

    ares05 Member

  25. ironass

    ironass Well-Known Member

    That kernel is for Gingerbread, Android 2.3.x. If you are on ICS, Android 4.0.3, you will need SiyahKernel SGS2 v3.3.2 from here. Flashing it is the same as the Gingerbread version. Just don't use the settings.

    Siyah ICS kernel (v3.x) thread

    Siyah Gingerbread kernel (v2.x) thread
    ares05 likes this.

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