https://www.theregister.co.uk/2019/02/25/huawei_mate_x/

MWC Huawei's foldable phone made its debut at Mobile World Congress on Sunday, and it's the most impressive attempt yet at creating a new consumer device category: the phone that becomes a tablet.

Following Samsung's Galaxy Fold, unveiled last week, it's one of several devices using folding OLED displays expected to be on show here at MWC. Some are concepts, and some, like Huawei's Mate X, will be "real" (if hard to obtain) products.