Xiaomi redmi 3s prime is the most featured mobile phone it its budget range. nowadays redme has launched xiaomi note 4A the cheapest and best in class mobile bt in comparision to that I prefer xiaomi redmi 3s for its best in class performance, looks, design, features ets.13MP primary camera with f/2.0 aperture, 5p lens elements, PDAF 0.1s ultra-fast focusing, high dynamic range ( HDR) , panaroma, 12 real-time filters, 1080p full HD video recording and 5MP front facing camera
12.7 centimeters ( 5-inch) IPS LCD capacitive touchscreen with 1280 x 720 pixels resolution, 293 ppi pixel density and 16M color support, 4100mAH lithium-polymer battery.
Android v6.0 Marshmallow operating system with 1.4GHz Qualcomm Snapdragon 430 octa core processor, Adreno 505 GPU, 3GB RAM, 32GB internal memory expandable up to 128GB and dual SIM dual-standby ( 4G+ 4G)
When two SIM cards are used simultaneously, the primary SIM can support 4G calls and data while the secondary SIM can support 2G calls only. as per my preference its is the best smartphne in budget range but company never tell us about what type of glass protection os used. but otherwise the brand is trust worthy. and you should go for the xiaomi mobiles.