CM11 ROM + OnePlus One Conversion Kit for Galaxy S2!


For those of you looking to try out the new OnePlus One smartphone, did you know you can install CM11 ROM and our HighOnAndroid OnePlus One conversion kit on your Galaxy S2?

This combination essentially turns your Galaxy S2 into OnePlus One, you will get nearly all of OnePlus One software features like OnePlus One lockscreen, Hexo theme, OnePlus One camera, Voice Recording app, and Screencast app (allows you to record voice while recording screen but having some trouble getting working on SGH-T989, works fine on GT-i9100 and SGH-i777).

For GT-i9100 and SGH-i777 users, you will benefit from having a stable CM11 ROM Snapshot “M9”, which is very stable and fast.  (Everything should be working flawless out of the box.)

For T-Mobile SGH-T989 users, you won’t be able to get a stable Snapshot version (as CyanogenMod team has stopped releasing snapshots) but you can still get pretty good performance with unofficial version.

Overall, this is a fun way to spend your week(end) or free time and try out what’s on the OnePlus One so definitely give this combo a go this week(end) and do let me know what you think!


Download CM11 ROM for Galaxy S2 GT-i9100 or SGH-i777

Download CM11 ROM for T-Mobile Galaxy S2 SGH-T989

Download Shift Kernel for SGH-i777 (You will need this to fix the buttons for AT&T S2 users!!!)

Download Android 4.4.4 Gapps [Use Micro]

Download HighOnAndroid OnePlus One Conversion Kit

Download CM11VolumeBoost (If you want to boost your speaker volume, install this after installing ROM and Gapps!) – Credits

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 Conversion Kit, and reboot.  (If for some reason you end up in a bootloop or get force-closed keyboard error on boot, reboot into CWM recovery, go to Mounts & Storage->format /system.  For TWRP, go to Wipe->Advanced Wipe->Wipe /system.)

For SGH-i777 users, make sure you also install Shift kernel after install ROM and Gapps!!!


First time installing a custom ROM?  See How to Install Custom ROM on Galaxy S3!

Credits – CyanogenMOD for awesome CM11 ROM!  The HighOnAndroid OnePlus  One Conversion kit also works on any Android smartphone or tablet running CM11 ROM, see How to Convert your Android Smartphone into OnePlus One!



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.

Q: How can I thank you for your tutorial?
A: I don’t take donations but if you could PLEASE subscribe to my Zedomax YouTube channel, that would help me greatly and thank you!

cm11-rom-oneplusone-conversionkit-galaxys2-2 cm11-rom-oneplusone-conversionkit-galaxys2-3

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51 Responses

  1. Yehuda Rauer says:

    Please subscribe me

  2. JStar says:

    heyy max, i love ur roms, can u please tell me how much battery life can i expect from this rom??

  3. Ryo says:

    Hi. I am using Amazing Rom DevDroid v1.2(based on CM10) because I read that they are so good at saving battery.
    But, on my GT-i9100 it does no better than CM10.1 on saving battery.
    So if u got oportunity,please feature [The Best Rom To Save Battery ]!!!
    P.S. I heard that latest(and also the last) version of Amazing Rom DevDroid v2.1.1 was good,but not tested my self…

  4. eric says:

    when you say gt i9100 do the ROM also fit in the gt i9100G international version? thanks

  5. Jamar says:

    Can a galaxy s2 use an LTE feature being an outdated device?

  6. felix says:

    so i accidentally installed the shift kernel on my tmobile galaxy s2 like a complete idiot. now the phone wont turn on and i cant seem to get it into recoverey. is there a fix to this? or is my phone forever lost? :/

    • bryanfeanor says:

      if it doesnt start at all is a hardbrick search at xda, or try to enter download mode with volume down, home and power buttons at the same time, flash a stock rom search at softbricks, also at xda. sorry for my english

      • felix says:

        its hardbricked because it wont start up at all. i bought a usb jig off of amazon to hopefully see if it will allow me to fix my phone :/

        • bryanfeanor says:

          Sorry to hear that, make sure to research very well before to do anything, how to, what not to do, what ifs, dont mess with bootloader and efs very important, xda- is a very good placer to search for help good luck

        • Jorge says:

          Try tu use Odin to restore all

  7. bryanfeanor says:

    Great! thanks, but i have i9100 in most of cm 11 based roms included m9 when i try to transfer files from an to my pc windows 7 the message “device has stopped working or has been disconected” appear and when i re-plugged, mtp device didn´t start pc reconize conection but is not accesible, i have to reboot the phone, i formated both interal and extsdcad to fat 32 and exfat but no solution, only in aicp rom. anyone have the same issue?

    • Cesar Belmonte says:

      Bryan, I had the same happen to me before. I just dont remember exactly how I managed to fix it. It was either a different USB cable, or a computer using Windows XP. Try each method and hope one of them helps. 🙂

  8. shane says:

    Camera doesn’t work on my t989

  9. Terrence says:

    I installed the ROM gapps and kernel on my i777 but the home button doesn’t work and I only have the one plus one camera and gallery. No theme nothing else.

  10. york says:

    Wont install on my i777 because it says failed this phone is not gti9100

  11. David says:

    Hy Max. Work perfect. Can you recomand me one kernel for this rom?

  12. Perla says:

    camera not working on my T-Mobile Galaxy S2 SGH-T989

  13. Perla says:

    4.4.4 Gapps wont install on t989?

  14. ADV says:


    this rom are great install this rom on my gs2 tmobile but the camera apps dont work everytime i take a pic with flash phone reboots or shuts down …..great rom but i take alot of pictures just socks

    is there a solution for this issue

  15. alias says:

    Hi…I have install it and smooth ….only thing that battery charging not work properly. Charging only when the phone is in power off.

  16. the Cadman says:

    Cool rom. My issues are the same as ADV and alias, when taking a picture with flash, the phone shuts down and reboots and it doesn’t charge properly, sometimes not at all except when its shut down. Also is there an overclocking kernel that works with the rom? I’ve tried wild kernels 5,6, and 7 and they make the phone keep rebooting like every minute or sometimes stay in a boot loop till I just reinstall.

  17. Eric says:

    Can any i777 users confirm everything works?

  18. iii says:

    Was the camera flash issue solved?

  19. Brett says:

    On the download page you have a nightly build for the t989 from 09/01/2014. Now that there are more recent nightly builds for the t989, can we update to a more recent build? Would that fix some of the issues maybe?

  20. aditya says:

    This rom sucks!!!….drains battery heavily in my i9100……

  21. David says:

    Does anyone else have a problem calling people? I’m using this rom on the Galaxy S2 for T-Mobile.

  22. Ged says:

    The only other ROM I flashed is AOKP ROM with wild kernel. Became so unstable I wanted a new ROM but wanted to hold out n wait for One plus One contest. I tried the AOKP with uber kernel but I couldn’t even restore my user apps. Love my first CM for the T989. Less customization but its stable. Did anybody try the volume booster?. U download n then what?

  23. thevinh says:

    This rom is very good , but when I install the rom finished , I heard the call or not to call , the other party can not hear speak , I speak just to hear the other side , off recall not hear anything else , restart the ok , but after the first time it again . please help me fix it

  24. James says:

    Trying to install on i777, No luck. I’ve tried TWRP and CWM for install, both end with a Failed message. Error states that this ROM is for an i9100. Any ideas on why?

  25. James says:

    For anyone else with the same problem, my solution was:

    1) Install shift kernel
    2) Reboot into recovery
    3) Install ROM, Reinstall Shift Kernel, Install GAPPs
    4) Enjoy or Complain, YMMV.

    Use this entirely at your own risk it worked for me, I don’t know how it will work for anyone else.

  26. James says:

    After a day of testing with an I777 here are the problems I see with this ROM:

    1) USB not recognized for file transfer.
    2) Back light not working on capacitive keys.
    3) If you enable proximity sensors for screen wake you can not unlock your phone without forcing a reboot.
    4) Once oneplusone conversion is installed the standard CM slidelock screen no longer formats properly.
    5) Every time I use “OK google” to initiate a google voice search I receive an “Unfortunately, Google Search has stopped.” error. Voice search works fine otherwise.
    6) Occasional camera errors.

    On the plus side my battery life has improved dramatically from the ROM I was running before.

    All in all the ROM and conversion look great. Thanks for all of the work on getting these to us.

    One question though, Can does anyone know if I can install CM11 M11 over this without a complete factory reset? If not for the conversion I would have no fears of doing a direct install and reflashing the kernel afterwards. Not really sure what all the Conversion tampers with. Just curious to see if a few of my issues might clear up with a new release.

    Thanks again for all that is done to help me keep this S2 running!

    • James says:

      Just for the sake of having my solutions in one location for others with same/similar problems:

      1) I haven’t had any luck fixing this one
      -Probably the biggest issue I have, cant find a solution to this one. Anyone else?
      2) The app STweaks fixed for me
      -I had the same problem with resurrection remix a while back
      3) No luck here
      -Would love to hear from anybody with ideas
      4) Sure there is a way, I can’t find it

      5) As found on the internet
      1-disable OK Google from any screen
      2-reenable OK Google from any screen
      3-Retrain by saying “OK Google” three times exit the final screen with the home key, Don’t press
      “OK” or “Finished” don’t use the “back” key. Just press home. Not sure what this keeps from
      getting corrupted but it works like a charm.

      6) Looks like I will live with this one for the time being, it’s VERY infrequent anyway.

  27. Wikus R says:

    Installed the ROM on my S2 9100.Worked fine till i installed the update to the latest release.Nowthe One Plusone theme is gone?

  28. cwagiz says:

    Pretty unstable. Too bad.


  29. nadeem says:

    Hey…all ur stuffs are good…but I faced one main problem,that my battery drains really very fast and while charging the phone becomes too hot… I had to flash into my official firmware
    Gt I9100

  30. Ali says:

    hey thnx for the awesome rom but am new at this things but i want to install CM on my S2 so i heard from my friends that there’s no WiFi-Direct in CM roms is that right and if it’s right is there any way to have it when i install it
    thnx again

  31. lordrapheal says:

    Please can anyone here light up my darken side about this. Anytime I try to install this rom on my t989 it always give error dat {radio must be higher than my radio uvli4} then I tried to upgrade my radio to uvle1 but now it says radio must be higher than uvle1 problem please help me out

  32. Vikram says:

    @james, could you pls explain how to enable backlight for capacitive keys using STweaks. I’d really appreciate it. Thanks.

    • James says:

      Allow superuser access, scroll to the right until you find BLN tab. Check mark next to BLN, BLNWW(saves battery). Set timeout. I also enable light on touch. That should do it. A reboot shouldn’t be necessary a I normally do one anyway. YMMV your own risk etc etc.

  33. Sean Wong says:

    This may be asked before, but what’s the difference between CM11 snapshot and oneplusone convert? Thx in advance.

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