Really really awesome product.
Battery backup is very excellent means once you charge your mi note 4 it will stand 2 days easily.
The 4 gb ram gives excellent experience.
Camara is also so good.
Sound and picture quality is also superb.
I have use vivo y66 but as compare to this mi note 4 is so faster.
No heating problem.
I love this product.
So I suggest you please go through this.