There are hundreds of VR headsets available for your Android smartphone. You can findcheap ones ( Google Cardboards) for around Rs. 250 and more expensive ones like Samsung Gear VR for around Rs. 7000. If you are looking for a VR headset, that is not too expensive but still offers you the best VR experience on mobile, then your best bet is MiVR Play. Just like Xiaomi does it with its smartphones, it has done the same with its VR headset. The Mi VR Play headset is relatively cheap but does not skip out the premium features.