Karbonn k9 smart is not smart ever.it is very bad mobile with bad features .it’s design and look is very poor and not attractive.sound is good but not much better .use of this mobile is not easy .and ranges of features of this phone are very less and poor.battery backup is very worst and poor.reliability of this phone is not good .overall according to me this karbonn k9 smart is very bad quality phone .it’s total money wasted mobile .there is no value for money.so this mobile has nothing better.