I am using redmi note 4 from past 4 months and I have no issue with the phone phone works excellent .
Battery capacity is too good easily we can use this for one and half day . camera quality is also brilliant and os updating facility is also good and build quality and design is soo nice phone looks premium .
Sound quality is also good
Redmi note 4 comes with snapdragon835 chipset and android marshmallow 6 and 4 gb ram and 64 gb inbuilt memory gives a faster experience . Redmi note 4 has dual led flash in rear and front cam has 5 mp and rear has 13 mp picture quality is good . it has wide screen of 5.5 inch . my experience with redmi is awesome