No second thought Xiaomi Redmi 3s Prime is best budget phone in indian market . I am also using this mobile from 1month but I have noticed that this mobile is full of bugs .in other words its Stable ROM needs much change . I am facing issues like Proximetry Sensor stop working then I have to reboot the device . some time confrence call not work. sometimes call ended when I pickup the call or sometimes during call mic and speaker is stop working . But this not phone issue this is miui issue. this is issue of rom which will be corrected by next rom update . if you want buy this phone then keep these things in mind