Xiaomi Redmi Note 4 is a coolest, smoothest smartphone really and in very low budget we get it.It has a great stylish look ever, and very slim.I m also using same device and I have experinced a lot from it, no any complains till now, no lags atall, gaming performance is like we are playing a game in pc having a high best nvidia graphics card really, because it has a 625 snapdragon processor and works wonderfully.Talking about its Battery Backup it has 4100 mah, yes we can use it till 1 and half hours with playing games, bt not continously, and need much time for charging bt its ok.Really the device is great I can say.Talking about its camera it has a great hd clearity, but no 4k rec supports it.And has great amazing features.But main spot about this smartphone is aftersale is not good, means the service centre is really bad.But I am hearing that the service centre will be becoming good.