I'm using Redmi Note 4 from January 2017 without any problem and also have Redmi Note 3, Redmi 1s, Redmi 3s prime, Max 2 in my Family.
Today I received Redmi 5a for my first cousin brother.
I use Honor 6x. My friend owns Redmi note 4. If you are a person who wants to stand out from the crowd, go for Honor 6x. It has great camera with sleek design. Airtel volte is unavailable at the moment. Redmi note 4 has similar advantages with airtel volte support.