Xiaomi is definitely not one to lag behind and since Meizu just updated its competitive offer - the Meizu m3s, it comes as no surprise that an upgraded Xiaomi Redmi 3 was also made official. It bears the Redmi 3s moniker and adds even more value to its affordable asking price. The Xiaomi Redmi 3s is still equipped with a 5-inch, 720p display, fitted inside the same body as its sibling, measuring - 139.3 x 69.6 x 8.5mm and also weighing exactly as much at 144grams. However, there is now a round fingerprint reader on the back of the unit. And the upgrade extends to internals as well....
Source: http://www.gsmarena.com/xiaomi_redmi_3s_is_now_official_with_snapdragon_430_soc_and_fingerprint_reader-news-18810.php