The karbonn k9 smart phone is not a good phone whithin the range of 3999
It’s a better way to buy the xolo era and micromaxx canvas spark 2 which have the better build quality and the better camera in this price range
Here are the specification vs karbonn a9 smartphone
Xolo era have better camera of 8 mp but in karbonn a9 smartphone have 3.2 mp which is not as good as xolo era’s 8 mp camera the display is dull not very sharp
so I recommend if you going to buy a smartphone in budget of 4000 you can choose the micromaxx canvas spark 2 and xolo era