The Redmi 3S is the latest Xiaomi smartphone to be launched in India, the biggest market for the Chinese manufacturer outside of its home country. The 3S comes in as a replacement for the now ageing Redmi 2, which has been quite popular and has been one of the best phones in its price range for quite some time now.
Source: http://www.gsmarena.com/xiaomi_redmi_3s_prime-review-1481.php