Upgrade android 4.2.2 to 4.4? I have spice Mi 506 which runs on Android 4.2.2. Can I upgrade my phone to Android KitKat 4.4. If so how do I upgrade?
There is no official update from Android 4.2.2 to Android 4.4 for the Spice Mi 506. However, you can use a custom ROM. Instructions for this can be found on Update Spice MI 506 to Android 4.4 using custom ROM

Use at your own risk, your Phone can be bricked afterwards and maybe you loose your warranty.