Xiaomi is set to unveil the Redmi 4 at an event on November 4, which is this Friday. At least that's what is allegedly teased by the image you can see to the left. The teaser has been outed by Xiaomi today, and it shows the upcoming handset's top left corner, seen from the front. You can just barely make out the earpiece, while the 2.5D curved glass on top of the screen is very obvious. The metal construction is also a given considering what can be seen in the image. The Redmi 4 has been rumored to sport a 5-inch 1080p touchscreen, a 13 MP rear camera with dual-LED flash, a 5 MP selfie...
Source: http://www.gsmarena.com/xiaomi_redmi_4_gets_official_on_november_4_according_to_a_teaser_image-news-21415.php