I have bought this phone 4 months ago.
I bought it from flipkart at that time price was 5800 and the company told that is is upgrdable to lollipop but still today I regularly check for update but it show u have latest update I want to upgrade my phone so I went to karbonn care and they told me that there is no lollipop version for machine and other thing this phone have is worst battery.
It takes too much time too charge and the drops too fast and the front flash in this phone is just a showpiece it dont work in low light it flashes a small amount of light that dont even reaches to your face at the time of selfie and the colour of your picture is in natural