The Redmi series is one of the most attractive lineups on the Android market lately. Combining great pricing with good performance and design, they are a really tempting offer for anyone who's actually able to get them. The Redmi 2 was awarded the best smartphone under $100 at the last MWC, and it was indeed a huge success on the market. The Redmi 3 has already spawned into three different flavors - the original Redmi 3 with Snapdragon 616 chipset with 2GB RAM and 16GB storage; the Redmi 3 Pro with 3GB RAM, 32GB storage, and fingerprint sensor; and the new Redmi 3s with Snapdragon 430...
Source: http://www.gsmarena.com/xiaomi_redmi_4_to_come_with_helio_x20_chipset-news-18939.php