The Huawei Mate XT Ultimate Design is official, the world's very first tri-fold smartphone. It was announced in China, and it's quite pricey.

Most of the phones with foldable displays that have shipped so far are designed to fold in half like a book. But the the new Huawei Mate XT is the first commercially available phone with a tri-fold display.

SHENZHEN -- Chinese technology giant Huawei on Tuesday launched an industry-first tri-fold smartphone in South China's Shenzhen, with a number of technological breakthroughs such as a dual-hinge system and screen-bending features.