How To Install GT-i9100 ROM on AT&T Galaxy S2 SGH-i777!

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There’s always been a way to run GT-i9100 ROMs on AT&T Galaxy S2 SGH-i777 but there’s a really easy way now simply by flashing kernel and modem.

This will work on any GT-i9100 ROMs that are TouchWiz-based and on Android 4.1.2.

Step 1. Download the SGH-i777 modem and Jeboo Kernel:

Download SGH-i777 modem

Download Jeboo Kernel for SGH-i777

Step 2. Also download the GT-i9100 ROM you want to install such as Biftor ROM I am installing in this video tutorial.

Step 3. Reboot into recovery. Then wipe data/factory reset (unless installing same ROM), install ROM, install modem, install Jeboo kernel, and reboot.

That’s it! Huge thanks to XDA developer Jeboo for his Jeboo kernel, which comes with the button fixes and other stuff to make it work out of the box easily.

Credits – Jeboo Kernel, modem

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23 Responses

  1. Arnold says:

    Does this work with any ROM? Will you no longer be posting specific ROM’s for i777?

  2. Josh says:

    Is a data wipe absolutely necessary or can I get away with not doing that?

  3. Sulav says:

    Please find something like this for sgh t989 as well

    • Robby says:

      It would be impossible, the two are too different. The only reason this is possible is because the i777 and i9100 are mirrors of each other, by that i mean all the specs are almost identical.

  4. Andrew says:

    Boot loop with the biftor rom i777

  5. Sterling Fairhurst says:

    Will doing this still allow you to use the search button on the i777 with i9100 ROMs?

  6. Djordje says:

    I;m little confused, if i install this rom on my galaxy s2 gt-i9100 i dont need to install modem and rom for i777?
    What steps i have to follow to install this rom on gt-i9100?
    Thank you.

  7. Omar says:

    Can I use ajk kernel instead?

  8. Omar says:

    My phone doesnt charge with jeboo kernel

  9. dmitry says:

    Could not make calls with that modem. I couldn’t hear the other side and the other side could not hear me. I had to download a different modem, and that fixed the problem, but I’m not using Biftor anymore anyway. I didn’t like that it was too much color and it was cartoonish. Switched back to AOKP

  10. Sam says:

    I did this with some success, but I lost all my files on the phone for Titanium. I also did a Helium (Carbon) back up while on the unrooted official ATT Jelly Bean, but after I installed this rom, the files were wiped. I have the Titanium files on my computer, but for 6 months ago. I did a back up with Kies while still on the new official ATT Jelly Bean, and the most up to date titanium was in that back up I hope. I have been trying to return to the official ICS, and then subsequent ugrade via Kies to the official ATT Jelly Bean. I was tryin Mobile Odin, but it doesn’t seem to recognize the Flash Kernal v1.0 for the sgh-i777.. What now?

  11. Wesley George says:

    Has jeeboo released an updated kernel…I long for OC

  12. MisterTony says:

    Coming from Biftor, wiped data/factory reset,installed ROM, installed modem, installed kernel now stuck on boot animation, removed the battery several times no luck. Can`t boot into recovery also. Any help would be appreciated.

  13. chris says:

    i run this modem and ajk kern with aokp and biftor it all runs awsome except u cant watch videos on you tube for some reason it stops i love the ajk kern it works great and battery life is efin awsome with the ajk and \aokp_i777_ota-eng-task650_6.24.2013 so yeah this modem and ajk and aokp 177 rom wicked combo u all should try it and over clock at 1.6 ghz even better

  14. Niklas Smeds says:

    Hi. Does this work on stock unlocked s2. I’m from finland so i don’t have at&t s2 model.

  15. sameer says:

    after flash and insttal rom my samsung s2 show only samsung logo what i do

    • sparsh bhutani says:

      wipe data and wipe cache and then wipe dalvik cache first and then install this rom when installation complete again wipe data and wipe cache then its work

  16. Joe says:

    I tried to install the rr 5.1 on my att galaxy s2 . It installed fine
    But I can’t make calls or receive calls . The phone rings. But it sounds like im on hold.

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