I used a Karbonn A12+ and did not like it and so gave it off in a very short time.
Processor performance and speed are really good. Screen is bright and being IPS display, the viewing angles are also good. The features it offers for its price are great. Why I did not like it is because of the flimsy build quality, poor touch, sound quality and really really pathetic camera. The camera is as good as not having it. W.r.to the poor touch, I used it with the screen guard that came with the phone. Other users reported the touch response is good once the original screen guard is removed. So touch may not be an issue.
If build quality and Camera are not at all important to you, you may buy this phone, otherwise stay away. These phones offer good value and tempting to buy, but once you buy and the fancy fades away, you will start thinking of upgrading.
So even if you have to spend a little higher, I suggest you go for a good brand which pays up in the longer run.
***If this answer has helped you, please like FAQtory.in on Facebook. Please click the LIKE button on the side of this page or visit https://www.facebook.com/faqtory.in ***