These are the instructions to root Micromax Canvas 4 A210 (running on android 4.2.1) using Framaroot App (this procedure does not need a computer).
Requirements: Your Micromax Canvas 4 A210 smartphone should have at least 10-20 percent battery to perform the rooting process.
Optional: You can also verify the root status of your device by using the Root Checker Application.
[*] No data loss process: Your Micromax Canvas 4 A210 Phone Data like contacts, pictures, videos, music and etc will be not affected with the above method.
[*] Device Warranty: Once you fully unroot your device through SuperSU, you can claim for the phone warranty. In short no need to worry about the phone warranty.
[*] Micromax Stock Firmware: If you are looking for the original Stock Firmware, then head over to the Micromax Stock Firmware page.
[*] Micromax USB Driver: If you are looking for the original usb driver then head over to the Download Micromax USB Driver page.
[*] Credits: Framaroot App is developed by alephzain (XDA Developer).