It has many great features. First let us understand what is CM. CM stands for Cyanogenmod. It is an open source project, so can make any changes. The sourcecode of CM is available at Github.
Instalation Process:
Your Device should be Rooted.
Battery should be more than 70%
CWM recovery installed
Backup of your data
Drivers of redmi 2 on PC
Key Features:
and lots more
STEPS:
Step 1: Download CM12 ROM and Gapps zip file and then transfer it to your phones SD card via PC
Step 2: Reboot into recovery mode
Step 3: “Wipe data factory reset”. After that go yo advanced settings and clean “Cache” and “Dalvik cache”
Step 4: Go to main menu and select “install zip from sd card”
Step 5: After installation reboot the phone. It will take some time to Switch ON the mobile.
That’s it. You are done. Now enjoy Lollipop taste !!!
DOWNLOAD
CM12 ROM
Gapps for CM12
CM11 ROM for redmi 2
Gapps for CM11
Note: Rooting will void the warranty and we are not responsible for bricked devices and sd cards.
Source: XDA and MIUI forums