The Xiaomi Mi Max 3, like all Mi Max devices, is sold with the unique feature of having a huge screen. This generation has a 6.9-inch FHD display, which is matched by few other phablets. Units of this model worldwide are now eligible for an official update to the Pie-based MIUI 10.
https://www.notebookcheck.net/The-Xiaomi-Mi-Max-3-gets-updated-to-Android-9-MIUI-10.413813.0.html