• Introducing XDA Computing: Discussion zones for Hardware, Software, and more!    Check it out!

[ROM][GPROJ][5.1.1] CyanogenMod 12.1 / CyanogenOS 12S (beta)

Search This thread


Recognized Developer
Mar 12, 2011

CyanogenMod 12.1 / CyanogenOS 12S
unofficial builds by dadi11

About CyanogenOS 12S:
It's my latest build of CyanogenMod 12.1 repacked with some CyanogenOS 12S apps, libs and bootanimation added. I've also removed broken CyanogenSetupWizard and turned off cm OTA updates.

Screenshots: http://imgur.com/a/iHrQ7

List of included apps:
- Boxer Email App
- CameraNext
- CMFileManager
- CMWallpapers
- GalleryNext
- Hexo Theme from CyanogenOS 12 (activate it in the CM Theme Engine on your phone)
- LockClock
- MaxxAudioFX
- NextBit
- Truecaller (incoming in CyanogenOS 12.1, but I have it alreay here)
- Screencast
- CM Theme Showcase
- Sound Recorder
- Terminal
- Theme Store
- Trebuchet Launcher
- Google Conenctivity Services
- Ambient Core (Cyanogen OS 12 Account Manager - important, dont delete it!)
- Android For Work
- Eleven Music App
- Face Lock
- Media Provider
- Theme Chooser

CyanogenOS 12S - https://mirrors.c0urier.net/?dir=android/Dadi11/CyanogenOS%2012S%20%28beta%29

Flashing Instructions:

To install this ROM you will need to have an unlocked boot loader and a latest custom Recovery such as TWRP or PhilZ installed

  1. Copy the downloaded ROM to your phone.
  2. Boot into your recovery
  3. Back up your ROM
  4. Enter recovery
  5. Make a full wipe (system, data, cache, dalvik). If you're updating rom or have other 5.1 already you don't need to wipe data (wipe system, cache, dalvik)
  6. Install the ROM
  7. Install GAPPS package
  8. Reboot - the first boot can take up to 5 minutes

How to fix the sensors:

When sensors doesn't work you need to:
  1. Boot into recovery
  2. Make full wipe
  3. Install this rom: http://buf.jollaman999.com/Requests/cm-11-20150125-UNOFFICIAL-gee.zip or any other gee rom (e.g. Axxion)
  4. Reboot
  5. Back to your recovery
  6. Make full wipe again
  7. Install the ROM and GAPPS

Device tree and kernel: https://github.com/lollipop-og

The CM team


XDA:DevDB Information
CyanogenMod Lollipop 5.1.1 - CM12.1, ROM for the LG Optimus G

Source Code: https://github.com/CyanogenMod

ROM OS Version: 5.1.x Lollipop
ROM Kernel: Linux 3.4.x
ROM Firmware Required: Recovery with SELinux support (latest PhilZ/TWRP)
Based On: CyanogenMod

Version Information
Status: Testing
Current Stable Version: 12.1
Current Beta Version: 12S

Created 2015-03-28
Last Updated 2015-05-21


Senior Member
Nov 12, 2014
oh man you're so fast i waited so long for this ;) thanks for sharing and Thumbs Up for your wonderful work :) will post review after test but i think it might be masterpiece ..


Jul 23, 2014
Is there a way to run 5.x on Korean phones without sacrificing LTE. There are a bunch of neat roms but all of them require a baseband workaround for signals to work which doesnt really work well with LTE.
I will really appreciate some help.


New member
Mar 12, 2009
Wanted to try the latest of Android, I decided this one was the one to go: Based on cyanogenmod and 5.1.
It looks nice and smooth. But there are some bugs:

-supersu unable to install
-no automatic root the CM way either
-can't open/install apk files except for google play apps. ( Yes: unknown sources is checked)

My mistake: enabled cyanogen-recovery.
So say goodbye to my backups and I am unable to install any other ROM.

Be warned! It's probably a testing build..


Senior Member
Sep 26, 2013
First, i would like to thank you. You rom is superb. The performance made me speechless. with 5.02 the antutu benchmark will only get to 21k. but with your rom its fly high up to 27k. Just minor bug to be fixed. installed in e975. did a fresh install. Everything is working fine except these:

1) watchdog error screen will popup sometimes. I read around and people said it was either a problem with the kernel or the modem.
2) in contact quick dial tile, when selecting the 3 dot menu of the tile, contact will FC.
3) messaging - can send text msg out but cant receive any.
4) lock screen status bar position will sometimes be off. It will drop down sometimes leaving an empty space on top at the position where it should be.

other than that, its a wonderful rom. You really done a great job. Thank you for your hard work.

Last edited:


Senior Member
Jan 5, 2015
Trying on MultiROM. Downloading:)

HIT Thanks if you like my post

My work:
[TOOL]Kernel/Boot.img (un)packer
[ZIP]Flashable zip to bypass lockscreen for LG E975

Info about my work:
1)Kernel tool (reported to work on MTK too, tested on Qualcomm)
2)Bypass forgotten lock-screen without a factory reset
3)A COMPLETE TOOL for android, easy as cake, reported to work on MTK&Qualcomm​

Top Liked Posts