I buy it on 7 November 2016 redmiprime with good Dolby sound( compare to other mobile) , it very efficient to use to use it batter capacity is 2500mh and total mobile weight 150 gm but don’t worry all the Wight are efficiently transfers to its total size, I t design is much good it’s edge are so slim which make him so good, it 1.6ghz metiatek processor 2 gb ram 16 gb internal memory 8 and 5megapixel camera, it is so reliable and durability good, it come in around 6999 thousand only which is good for user