I recently purchased Redmi 4 16 GB version. I was looking for a cheap 2nd phone and this phone was perfect for me. It has got thenbest specification for its price. The performance is smooth. The battery life is awesome . It easily lasts 2 days as my second phone which I constatnly use for wireless hotspot and moderate amount of calling and browsing. Camera is average but I cannot complain for the price. I highly suggest this phone in Sub 10K category . Also black colour is recommended as it looks classy.
