In order to unlock the Videocon A45 device, you will need to download and install Unlock Root software. Once you install it, connect the device to your computer using the USB cable and select USB Dubugging Mode from its settings. After that, launch Unlock Root, click the green Root button and wait a few seconds. If you have issues, use the support@unlockroot.com
email address to get in touch with Unlock Root Support team.