How to root SGS2 i9100T

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  1. coreybacon

    coreybacon Member

    Hi all, i have googled it and i cant find anything.
    i am trying to root my SGS2 I9100T from vodaphone australia.
    but i cant find any guide on how i should do it. i want to be able to do a nadroid backup once i have rooted it. and i am going to be installing some ICS custom roms.
    can someone please direct me to a link explaining how i should root my phone.

    is rooting with "CFROOT" best. as i want to be able to install cfroot manager so i can do rom backups
    and is rooting a I9100T the same as rooting a I9100???

    Thanks Heaps to anyone who can help
    Cheers Corey

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  2. ironass

    ironass Well-Known Member

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  3. coreybacon

    coreybacon Member

  4. ironass

    ironass Well-Known Member

    I stand corrected. After reading more on xda it would seem that the "T" version is the same as the "International" one.

    If that is the case, then you should be able to use the rooting guide. here:-
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  5. coreybacon

    coreybacon Member

    Ok thanks heaps.
    But just to make sure. Is the anyone here who can confirm that i root my phone in the same way as the internation one??.
    Has anyone else here rooted a i9100t the same way as the i9100???

    And can i do a nadroid backup of my stock rom, if i root it with the above guide???
    Thanks heaps to anyone who can help
    Cheers corey
  6. ironass

    ironass Well-Known Member

    Maybe these posts may help you:-

    [Q] Debrand, etc. [A] How to root GT-I9100T (Australian user) - xda-developers

    What is the difference between the I9100 and the I9100T? - xda-developers

    It would appear that both the i9100 and i9100T (for Telstra) are identical in every respect, save one. That is the "T" version has a different modem that is optimised to 850 MHz band which both Telstra and Vodafone networks appear to use in Australia.

    Therefore, if you rooted and installed custom ROM's it is not a problem except for the "T" modem which would have to be flashed afterwards.

    See post #5 here:-

    [FIXED] Help With Reception on Galaxy S2 i9100-T (TELSTRA AU VERSION) - xda-developers

    Hope this helps. :D
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  7. Shotgun84

    Shotgun84 Well-Known Member

    Yeah listen to ironass. He knows what he's on about most of the time and this is one of them;)
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  8. ironass

    ironass Well-Known Member

    Don't say that Shottie!

    I got it wrong in post #2. There are so many versions of the Galaxy SII out now that it's impossible to keep up.
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  9. Shotgun84

    Shotgun84 Well-Known Member

    Don't worry I remember reading somewhere the t version is the same. Although I won't take any responsibility if it goes wrong. That ones all on you :D
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  10. coreybacon

    coreybacon Member

    Hi all,
    Thanks heaps, i am going to root my phone tomorrow :) And then install "Android pissing on apple" bootload lol

    but i do have one qustion more ;-)
    can anyone tell me where i can download the currect moderm for a Vodaphone I9100T australia SGS2. and how would i go about flashing it to the phone after i install android 4.03 custom rom on my phone???

    Thanks Heaps to anyone who can help
    happy rooting (not that kind of rooting ;-)
    Cheers Corey
  11. coreybacon

    coreybacon Member

    i just want to double check. i can root my I9100T phone with this guide yes??:

    it is just on the guide it say it is just for the I9100. and no other versions.

    just double checking before i root it lol. as i dont want to brick my phone first time lol.
    and i have a usb jig, so i should be able to unbrick it if all goes bad lol.

    Cheers Corey
  12. ironass

    ironass Well-Known Member

    Since rooting only changes the kernel, then from everything I have read, you will have no problems.

    The modem conflict only occurs when you come to flash a ROM at a later date. You will need to download and install the modem for the, "T", variant afterwards so that it is compliant with your network. Your problem would appear to be finding a modem for ICS that is compliant with your network should you choose to install ICS.

    The, "current", modem you are inquiring after is shown in the link I posted earlier but I fear that the current modem is not compatible with the ICS ROM..

    To be honest, when I wrote that guide, I was not aware of the, "T", variant and it's needs.
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  13. coreybacon

    coreybacon Member

    ok thanks heaps. i am downloading all the stuff i need now to root it :)
    but i do have a few more qustions lol.
    what is the best way to backup all my apps, and media???
    i have already backed up my data with mybackup pro.
    and do you know how i would go about doing a nadroid backup after i have rooted it?. as i want to be able to flash back to my stock rom after i have installed customs roms. in case of warranty problems ect.

    and if i install a 4.0.3 ics custom rom. do you know how i would go about updating to the official ics rom for my phone. which is being released in the next month or two???. as i dont think you can do the update thing from within the phone, like you can with a stock rom.

    Thanks heaps if you can help
    Cheers CoreyB
  14. ironass

    ironass Well-Known Member

    You should not need a back-up to just root your phone as, if you do it correctly, nothing is changed apart from the kernel. As you are not rooted at the moment, MyBackUp Pro is about all you can use. After rooting you can install Titanium Backup which offers a lot more features. See the, "Dummies Guide", for info.

    To do a nandroid backup after rooting you would use CWM Manager that is installed automatically when you root. See, "Dummies Guide".

    You would have to revert back to the stock firmware you are on now for Kies to recognise your handset or you could flash it via Odin.

    I would reiterate, I know of no ICS modems for the T variant at present.
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  15. coreybacon

    coreybacon Member

    Hi, thanks heaps, i have just rooted my phone. and i am very pleased with it, now all i have to do is go and install some custom roms :)
    but i have another problem now :-(
    i bought a usb jig the other day. so that i could remove the yellow triangle on start up, aswell as for warranty purposes.
    but when i do as it say in the video (turn phone off, and plug jig in) it goes in to download mode. but it does not show the "eraseing download information succeded. it just says:
    Factory mode
    product name: GT-i9100T
    Custom binary download: yes (1 counts)
    current binary: custom"

    from what i have seen it should be like it is in this video:

    How to use USB jig on Galaxy S2 i9100 to reset download counter or remove yellow triangle - YouTube

    can someone please tell me if i am doing something wrong? or what i should do about it??

    Thanks heaps to anyone who can help
    Cheers corey
  16. coreybacon

    coreybacon Member

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  17. coreybacon

    coreybacon Member

    oh crap!!! i am having a problem with my phone :-(
    when i plug it in to charge, it can be on say 52%, but then 2 mins later it will suddenly say it is fully charged!! what can i do???
    please help!! as i am worryied i have broken my phone :-(

    Can someone please help
    Cheers CoreyB
  18. Shotgun84

    Shotgun84 Well-Known Member

    I would give this a go. Turn your phone off and then plug it in. When it reaches fully charged unplug and remove the battery. Wait for a couple of minutes and then reinsert and turn your phone back on. That should've recalibrated your battery.
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  19. coreybacon

    coreybacon Member

    Ok thanks heaps shotti, it worked great, my batterie is chargeing right now.
    But i need some help with a couple of other things.
    how do i change the boot animation on the s2?? I want to change it to the android pissing on apple one i found on xda.

    How can i remove the vodaphone screen that comes up when i first turn yhe phone on???.

    And how can i get my usb jig to work?? I explained what is happening when i plug it in in an above post.

    Thanks heaps
    chers corey
    Send from my SGS2
  20. Shotgun84

    Shotgun84 Well-Known Member

    If you want to use a custom boot animation you will have to flash a kernel which supports them first such as siyah.

    I'm not sure how you go about removing the Vodafone screen manually but if you were planning to put on a custom ROM that should get rid of it.

    It might be that your phone has the new bootloader which the USB jig doesn't work on. But again if you are going to use a custom ROM that should instal the old one and the jig should work.
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  21. coreybacon

    coreybacon Member

    Hi all, i have got my phone working well now. and i ahve managed to put the android pissing on apple bootloader i wanted on it as well ;-)

    i found out that samsung have dissabled the usb jig from resetting the counter on its latest bootloader,
    so i downloaded an older one and it is working fine now.

    Thanks heaps for all your help

    Cheers Corey
  22. ironass

    ironass Well-Known Member

    Glad you got it all sorted coreybacon! :)

    Thanks for your Thanks on this thread. It's nice to know that Shotgun84's and my help is appreciated. ;)
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  23. j69

    j69 Member

    After rooting my galaxy S2 ( GT1900T) , I noticed that my phone is crashing or losing his colore after installation of app like Tasker or AutomateIt.
    Once I remove those app , phone is ok .
    Do you have any idea why ?

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