The Lenovos vibe k4 note is best after k3 note. This smartphone has 5.5 inch full HD display which bezels and shines well. 3300mah battery is good also and has 3gb of ram for efficient performance and gaming. The phone has 13 megapixel rear camera sensor which has good color reproduction capability and front 5 megapixel camera is nice too.
Comes to the most interesting point of this device that the device support Dolby Atmos audio technology with some noise reduction technology which reduce the excessive noise when you record the sound. It is true to say that the two front firing speaker of this device gives a 360 degree sound experience even without headphones. This device also support VR for immersive video experience.
Only the bundled earphone is not good for this Dolby Atmos technology, you should buy a separate earphone for better experience. So under 11k price segment it is truly nice device.