I have been using this mobile from a month, The audio quality of the speakers and Microphone is very clear. Redmi 4 runs on MIUI 8 rom which gives user friendly experience, the MIUI 8 rom is very smooth that phone never gets hanged. The mobile is beautifully designed with metal body with excellent finishing that fits in the user hand perfectly. Redmi 4 has 2.5D curved glass, it has 13MP primary camera that captures photos of good quality, it has 5MP selfie camera which is also good. It has Qualcomm snapdragon octa core processor with 16GB rom and 2GB ram that gives excellent experience while gaming and watching movies. It also has fingerprint sensor which unlocks in fraction of seconds. It comes with a IR blaster which can used with our TV, Ac and other devices to control. The mobiles looks great at both the colours with metallic finish, what more one can expect other than these features, Redmi 4 is priced Rs 7000 which is absolutely value for money with so many features and build quality.