Got a Karbonn Smart A21 that you’ve been dying to gain root access on? Say no more! This guide will teach you exactly how to gain root on your device, opening the door to being able to install custom roms and even mods! Let’s get started!
Disclaimer: This guide is intended as a helpful “how to”. dotTech and its writers are not responsible for any gain or loss (including but not limited to bricked devices) incurred as a result of following this guide. Root your device at your own risk. Rooting may void your warranty.
This root guide is for the Karbonn Smart A21 running Android 4.0 Ice Cream Sandwich. It is specifically for the Karbonn Smart A21.
Take note this will void the warranty of your device. Proceed at your own risk.
Before We Begin
Have a micro USB cable
Download the Karbonn Smart A21 USB drivers  and install them to your PC.
Download the rooting package  to your PC. Once downloaded, make a folder on your desktop called Android root and extract the root package (called Root_with_Restore_by_Bin4ry_v31.zip).
Enable USB debugging mode by going to Settings then Developer Options. Once in Developer Options look for USB Debugging and enable it.
During this process your phone will reboot 3 times.
How To Root Device
Connect your phone to your PC using your micro USB cable. Once connected, go to Android root located on your desktop and look for a file called Runme.bat and execute. Inside the Runme.bat file, some on-screen instructions will appear. Press the 1 key on your keyboard. This will show even more on-screen instructions. Follow them carefully to root your device.
Enjoy a rooted a Karbonn Smart A21.
[via androidrootguide ]