I have been used this phone aroud 4 months. dont buy this phone this phones camera was not good I lowlight in the lowlight picture was too bad, dully and dark. the flash was not too good. when you take a photo in night its flash was not good the flash was not powerfull in price range. I think in this price range another phones flash was perform better than redmi 4.
And the next thing is that redmi 4 fingerprit sencor sometimes it was not work. I properly give my finger to the fingerprint sensor but it was not able to identify the finger.10 of 6 times it was unlock my phone.
And the next thing is that redmi 4 body metirial. build quality was good but phone was too much sleepy, silky. it means fall from hand.
Next point is battery. battery was good but the problem is that the battery was too much time to take fully charge. with the mi charger it takes time aound 3 hours. it was too long to charge the battery that was a negetive point.
Next thing I dont like that it display every mi phones display was not good. my redmi 4 display was broken.unespectedly it was drop from my hand( hight around 3-4 feet) and I saw that my phones display was gone.
That was my one of the worst feeling ever with this phone.
And the last point is nevigation button backlight. there was no backlight on redmi 4. and other mi phones have colorfull notification light but on the redmi its have only single color led notification.