Redmi 4 is an amazing phone. Built quality is super good.Talking about the sound quality is very very good. Is very useful and easy to use and yah I guess most of the MI users are very much comfortable with this phone. It never goes hang.The body shape is very slim and comfort to handle the phone with one-handed.It looks very stylish as it has got full matel body.It has got infrared which is the most fabulous feature of this phone.You can control all your electronic devices which access through infrared.E.g. your tv, sound system, A/C, e.t.c.Feels great to use MI Redmi 4.And value for the money is just awesome beacuse in this price non of the other companies can give you such amazing features phone.