KARBONN K9 is the decent smart phone with 4G connectivity.it has a processor of quadcore 1.2 ghz with an operating system of andriod v6.0 marshmallow.it has a decent camera of 5 mega pixel with led flash.battery of 2300 mah is good enough to last till 5 hours.with a ram of 1 gega bytes and an internal rom of 8 gega bytes.all these features at a price of just 5.1k which is amazing.sound quality is not upto the mark though.looks are good.display is of average quality.overall it is nice introduction from karbonn it gives you satisfaction after using this phone.i recomment this phone to everyone its value of money.i give 4 stars to this mobile.