My sister is using this mobile XIAOMI REDMI NOTE 4 4GB RAM from one year.
First quality of this mobile is its build quality is very impessive.
Second good quality of this mobile is its design . It us very slim mobile and easy to hold.
Third good quality in this mobile is its camera. Back camera picture quality is very nice and for selfie lovers its front camera is perfect for them.
In this mobile its display is excilent. Its touch is like butter very nice touch.
Speaker of this mobile is like small sound box it is loud and very good.
In this mobile 4GB RAM is given which is very use full to manage saveral application at a time it works very fast.
And the last good quality is for them who bor in short time . In this mobile sevral themes , font is given through which we can change the look of mobile.
One problem in this mobile is its heating problem.
Thats all from my side.