After getting to know Xiaomi's Redmi Note 4 with Helio X20, it's time to meet the Snapdragon 625 edition. It promises better battery efficiency and thermal control thanks to the more advanced manufacturing process. But these improvements may have cost the Note 4 some of its performance punch, and we will duly explore this possibility.
Source: http://www.gsmarena.com/xiaomi_redmi_note_4_snapdragon-review-1593.php
