I bought this redmi 4( 32GB) Last year in the month of May in 2017 from Amazon. I am using this from last 8 months. it gives 10to11 hours battery backup for mix-use( Internet surfing, music playing, downloading gaming) .In my genuine view the major and broad feature of this phone is It has 4100 MAH battery capacity. One another plus point of this phone is Upgradable to Nougat version quickly and easily.Same thing with MIUI9. Daily I use it continuesly for 4-5 hours But sometimes it gets so heated & It seems that the battery is going to burn, It Goes to 47 degree Celsius.But heating issue doesn’t happen usually.if u want to replace any accessories it will be expensive because redmi only has combos it costs you high in Comparison of total price of Handset.This phone is balanced slim.Though this is slim yet powerful. looks like Apple mobile mattel finish, very durable.fingerprint lock is amazing. sound quality is too good. but manufacturers does not provide the earphone with this handset.both front and back camera is too good in this price range. but sometimes some heating issues while charging. It takes 95to110 minutes to full charge. overall performance is better.Good value for your money.