Karbonn a12 star is not good phone.
Its front camera is bad and its has only 512 MB ram which is low as compare to other phone in its range its internal memory is low nd we install less apps in this phone.it hangs many time nd its battery is getting down fastly it heats up quickly.
So I don’t like this phone.for installing new apps we have to uninstall old one. Many games are not work in this phone nd many games are run very slow. It suddenly restart also this in not good phone hd videos are not play smoothly and sound quality is also not good.