I am using yu unique 4G phone since 3 months I was brought RPS.5700 I think this is good choice and amazing look it have only black in color with slim body and lighted weighted phone it have 1 GB RAM and 8 GB ROM also it have 8 MP back camera and 5 MP front camera and it have 4.7 inch screen size with good sound quality and it have android 5.1 lollipop but I m facing some problem in that is heating problem and network problem I think its not a big problem but all over its good 4G phone in this price.