K4 note is a good quality launch by Lenovo and I am using this mobile since August 2016. This mobile has a strong outer shell along with all required features like it has enough memory and Ram which makes it fast.
It has dollby sound which makes it different from other mobiles because of its clear and loud sound with high quality. I have several time used its camera and it captures hd pictures and works best in green areas.
I play many games and use so many applications but I did not get any complain regarding its speed or performance. It has fast processor along with ram. operating system and its user interface also helps in better performance.
Mobile is quiet light weight and handy, looks stylish from back side. Recently I have upgraded it to latest version and its working perfectly. It has an extra feature - VR glasses through which we can watch movies and get the feel of theater.
This mobile is a value for money and even I gifted this mobile o my father last month on his anniversary and he feels happy having it and it was chosen because I am using it and had a great experience.