https://www.theguardian.com/technology/2019/mar/01/mwc-2019-folding-wrist-phones-5g-and-quintuple-cameras-8-standout-gadgets > Also unveiled in Barcelona: Microsoft’s Hololens 2 and phones with folding screens > The annual mobile technology jamboree in Barcelona has revealed the latest exciting developments that will feature in phones, tablets and watches over the next 12 months. From folding handsets and ultra-sophisticated cameras to brick-like smartphones with a very long battery life – here are eight of the most notable products from Mobile World Congress 2019 this week.