The Xiaomi Mix Fold 4 will be the new thinnest foldable on the market when it arrives, according to a rumor from May, presumably taking the crown from the Honor Magic V3 which is launching next week. Today an official-looking image leaked showing the Mix Fold 4's back, in a version with fake leather (there may be others using glass, we're not sure). Do note that this was labeled as a work in progress, so some aspects may change before now and the phone's launch. The phone has four rear cameras as you can see, which is the same number as its predecessor, but the camera island is...
Source: https://www.gsmarena.com/xiaomi_mix_fold_4_image_leaks-news-63543.php