Huami Technologies' CEO, Huang Wang, recently confirmed that the Xiaomi Mi Band 3 is coming, and some of its UI has just surfaced. If you take a look at the image down below, you will be able to see what seems to be a set-up tutorial for the Xiaomi Mi Band 3. This image was shared AndroidTR, and it seems like a user who shared it is translating Xiaomi's Mi Fit application to the Spanish language, and he received these UI elements in advance, which also signals the arrival of the Mi Band 3.
Having said that, if you take a look at the provided image, you will see a fitness band which resembles the Mi Band 2 when it comes to the design quite a bit. Now, the Xiaomi Mi Band 2 did not sport a touchscreen, it came with a capacitive button. Well, if this leak is to be believed, the Mi Band 3 will sport one such button as well, but it will also offer a touch-sensitive display. This set-up tutorial reveals that Xiaomi plans to include some gesture navigation options in the Mi Band 3, so, for example, you will be able to swipe up and down on the Mi Band 3's display to switch between weather, notifications, and other UI elements. The capacitive key which will be included in the Mi Band 3 will serve as a back button this time around, while that button will also feature a long-press function. It seems like you will be able to swipe up on the Mi Band 3's display in order to unlock it, if the leaked UI screenshot is to be believed.
That being said, the source also claims that the Mi Band 3's display will be considerably better than the display on the Mi Band 2, so we may even get a colored display. As far as specs are concerned, well, the source did not really share any info, so we'll have to wait and see. The Xiaomi Mi Band 2 was announced way back in 2016, so it's about time for Xiaomi to introduce its successor, and chances are it will arrive before the end of 2018, though nothing has been confirmed just yet.