Hello, lenovo k4 is the big hit after k3.lenovo k4 give u best experience ever.Specialy its battery backup is really awesome 3300mAh its non removable battery.and camera quality is also good.its on budget mobile under 12k.my experience is good with this mobile its awesome.primary camera 13 mp and secondary 5 mp.its good on daylight and dimlight clarity of picture is awesome.i experienced it really great when I took photos.
Sensors on the phone include Proximity sensor, Ambient light sensor, Accelerometer, and Gyroscope.its operating system is android 5.1.headphone 3.5mm jack.its processor make MediaTek MT6753.1.3GHz octa-core processor.its screen is pretty good with 5.5 inch so this mean it gives full hd entertainment.Twin Dolby Atmos enabled speakers.Fingerprint reader with gesture support.TheaterMax technology – Virtual Giant Cinematic Experience.it gives u a theatre like feeling.it should be purchase seprate not included with kit.after all this is nice phone in my opinion in small budget.lets go for it.thanks