Phone: Lenovo A820
Android: 4.2.1
ColorOS: V3.0
Hello everyone.
This is ColorOS by OPPO, ported to our phones. Fast, simple and beautiful 
Supported languages: IN, DE, EN, VI, TR, RU, CN, NL
Chengelog:
Lenovo A820 ROM COLOROS V3
• ODEXED all (faster, more free space in /data)
• Added Swype keyboard.
• Add Oppo Browser.
• Enabled A-GPS by defaut.
• Baseband V23.
• Add "Auto record calls" function in call settings, you can assign contacts to auto start call recording with them.
• Fixed lost app in Sdcard when restart the phone.
• Add the function to turn off data network automatically when the screen is off.
• Added the function to double tap the home button to lock the screen, now you need to long press on the Menu button to enable task manager.
• Updated the system strings, including English and all other languages.
• Updated Gapps.
• Fixed the issue that power on sound cannot be turned off.
• Fixed the issue that when using Bluetooth headset the phone may lost service.
• Fxied the issue when logging in email under Japanese language the email app may crash.
• Fixed the issue when creating a new message if you are trying to add recipient from call log the contact app stop working.
•• Other bug fixes and improved the system stability.
Important:
I'm uploading here Superthan's version of ColorOS port to our devices, because it's much better than mine, I think… So I leave porting this rom in superthan's hands 
If you were prompted about fix root, say YES.
My other roms: MIUIv5 Multilanguage | ProjectDoge FINAL
Files were tested, and they all works
You should do before installing this ROM:
- wipe data/factory reset
- wipe cache partition
- mounts and storage>format /system
- advanced>wipe dalvik cache