Download Karbonn Aura Power official firmware from below and use the flashing instructions contained at the end of this post to flash without stress.
If you notice that the firmware download link is broken of you have any other complaints to make, use the keep scrolling down to use comment form.
Karbonn Aura Power - Download
How to flash Karbonn Aura Power stock ROM
Follow the flashing instructions http://manmaza.blogspot.com /2016/03/easy-mtk-firmware-flashing-installation.html" target="_blank">here.