It's a average phone in this cost.i brought it about a year ago through flipkart. and I'm partially satisfied with the performance of this phone afterall what else you can expect in this budget.
camera-13 MP rear and 2 MP front but camera takes a lot of time focussing on objects and picture quality is not so good.
battery - 2500 mah battery.ok performance.needs charger of 1.5 mA output which is not so common.
operating system- phone comes up with android kitkat version but it can be upgradable to lollypop and it works with it smoothly.
and one more thing I want to tell you that initially( when u buy it) this phone performed well but after 6-7 months processing will slow and it will go as hell if u try to open 2-3 apps simultaneously.