This new device, Karbonn A99 is a dual core device with a 4 inch display. The display quality is decent and the pixel density is good. It has got 512 MB of RAM which would be good for browsing around but there would be times when the phone would slow down due to the lack of free RAM.
The phone runs almost stock Android Jelly Bean 4.2 which runs pretty smooth. It is a relatively new version of android and is much faster as compared to the previous versions. The camera on this device is 5 megapixel with a LED flash. The front camera meant for video calling is VGA. To power this device, they have used a 1400 mAh battery.
This Karbonn mobile is a low end android device running android Jelly Bean 4.2. It runs pretty smooth most of the times and can handle most apps with ease. If you clean up enough RAM, it can also run some resource intensive games with ease. This phone makes a great buy for the price.