The current version of the CM12 ROM is still at quite an early stage, but most of the important features are working flawlessly. There are some issues with screen recording and SIM tools, but hopefully they will be patched up really soon to enable this ROM to become a daily driver.
If you own Samsung Galaxy Grand Duos and would like to try an unofficial CM12 build on it, now is your chance. First, make sure to update to the official Android 4.2.2 ROM before flashing. This will flash a new bootloader, which is required to make the ROM work.
•RIL (Calls, SMS, Mobile Data)
•Sensors (Accelerometer, Compass, Light, Proximity, etc.)
•Audio (playback & recording)
•Everything else not listed under "known issues"
•screenrecord does not work
•FM Radio does not work
•Sometimes wake up causes music stutter
•Wi-Fi HAL (i.e. Scanning MAC Address Randomization) not implemented
•Sim Tool Kit (STK) not fully working
•Camera app sometimes crash on close
•Unable to un-pin screen without rebooting
•Some users have reported issues with call audio (see FAQ for a possible fix)
•Some users reported random low video recording volume
•Launcher shortcut of apps moved to SD might disappear (this is a launcher issue and I'm not planning to fix it. You may be able to switch to a third-party launcher which does not have this problem.)
•Swipe-typing and face unlock are NOT ROM issues. They need the proper libraries from Google Apps.
•Does not work on 4.1 stock ROM's bootloader, please upgrade to 4.2 before flashing…
*Additionally, Dual SIM has the following limitations:
•Both SIMs are always enabled (no way to disable one SIM)
•"Receive incoming call while data is enabled" is always enabled.
We provide various Firmware Updates and Rooting process along with Custom ROM,Modes,file are all belong to their owners/developers. The autor of this site or the developers are not responsible, if you damage or brick your device.Do it on your own risk and follow the instruction properly.
* How To Install:
Download CM12 Lollipop 5.0 Build
1-Make a backup!
2- If you were on CM 10.1 or a stock ROM prior to 4.2, upgrade to 4.2.
3- Install ClockworkMod recovery with SELinux support (.tar) (.zip). Older CWM will result in a "status 7" error.
4-Reboot into recovery
5-Wipe data if coming from stock or another non-CM ROM (You may get a "staus 7" error if you fail to wipe.)
6-Install the ROM
7- Optionally install the Google Apps Addon
* To upgrade to a newer build, simply flash the zip. There's no need for data wipe or flashing Google Apps again. (However, during this ALPHA stage, if you are experiencing strange issues, you may want to try a wipe.).