CyanideL ROM for AT&T Galaxy S2 SGH-i777! [Lollipop]


For those of you looking to run the latest Lollipop OS on your AT&T Galaxy S2 SGH-i777, you may want to check out CyanideL ROM.

Based on latest Android 5.0.2 Lollipop, CyanideL ROM by XDA user Rogersb11 brings a high level of stability and peace of mind for those of you who want to run Android 5.0.

Out of the box, CyanideL ROM brings you almost everything working out of the box including data, WiFi, bluetooth, camera, and more.  The only thing not working is video recording.  Considering everything else working, that’s probably a minor bug and should be fixed in future versions.

Inside CyanideMods in settings, you will be able to supercharge your phone with its endless number of customization including custom system animations, power menu, quick settings, Gesture Anywhere, Density changer, App Circle bar, and much much more.

Although it’s still work in progress, if you want to get the best Lollipop ROM on your SGH-i777, give CyanideL ROM a try this week(end) and do let me know what you think!


Download CyanideL ROM for AT&T Galaxy S2 SGH-i777

Download Android 5.0 Lollipop Gapps (Get the pico version!!!)

Download SuperSU

 For installation, please follow How to Install Android 4.4 KitKat ROM on Galaxy S2!

To install, reboot into recovery, make backup ROM, wipe data/factory reset, install ROM, install Gapps, install SuperSU and reboot. (If for some reason you end up in a bootloop, reboot into recovery, go to Advanced Wipe for TWRP or Mounts & Storage for CWM, format/wipe /system, then re-install ROM.)

Credits –  XDA <— Please donate to the developer of this ROM or hit Thanks button on XDA if you like it, thx!




Q: My 3G/4G LTE data is not working!!!
A: See How to Fix 3G/4G LTE data by Manually Setting APN on Android!

Q: I don’t have Play Store nor any of the Google apps!
A: You forgot to install Gapps, reboot into recovery and install it! (See above for download.)

Q: The ROM is not booting!
A: Try formatting /system and re-install ROM, sometimes the system partition gets corrupt and you may have to try 2 or 3 times before the ROM boots.

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15 Responses

  1. travis says:

    I’ve tried several kernels to get CWM recovery but Samsung recovery is too persisitant. Siyah and AJK kernels failed to hook me up. Do you have any advice at all for me? I’m currently running android 4.0.3 with Siyah 4.3.3 kernel on my i777.

  2. eric says:

    hey max, im getting detected file system ext4 for /dev/block/mmcblk0p9. any ideas?

    • young says:

      Just let it continue and it will be finished.
      Although I don’t know if it will any error after,but the system work fine up to now.

    • Elston says:

      Hey Im getting this error
      detected filesystem ext4 for /dev/block/mmcblk0p9
      its stuck out there? or is it in the process? i cant say my phone freezes

  3. Tony says:

    I cannot get the keyboard to display. It just does not pop-up when I enter a text box.

  4. Busy Brain says:

    My is working correctly u have to enable the keyboard in settings-Language & inpute- click on current keyboard and enable hardware

  5. Busy Brain says:

    My problem is how do i root it n when i install gooogle play service it start poping up message of gapps has stoped working, sorry for my bad language

  6. Raymond says:

    Hey Max,
    Yesterday i was looking for new roms for my tmobile galaxy s2 (sgh-t989) and i ended up mistakingly flashing a galaxy s4 rom onto my phone, i have a clockwork backup on my sd card but i am not able to boot the phone into any mode. Is there any way to fix this? will a usb jig work? please respond asap, thanks

  7. Rick Santerre says:

    My phone does not recognize that I have an sd card installed, nor does it recognize a 2nd partition on the sd card–how do I fix this?

  8. slider169 says:

    tried on my att i777, keyboard doesn’t work, it never pop out.

    • Moshe Friedline says:

      for those who have this problem, just go into your input settings and toggle the hardware button under keyboard settings.

  9. cherry says:

    where can i get the one for tmobile sgh-t989 ?

  10. Newton says:

    How do I install CWM Rom for the first time on an AT&T SGH-i777 phone? I do not have the “Install from Zip” in my stock ROM to follow the instructions provided. Thanks!

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