More trifold smartphones are popping up after Huawei's $3,600 splash

BARCELONA — China's Huawei isn't the only smartphone maker adding a third display to its devices. At the Mobile World Congress (MWC) trade show in Barcelona, a number of firms were showing off their display technology innovations. The South Korean tech giant Samsung revealed its new "trifold" concept devices at the event: the Flex G and Flex S. The Flex G has three screens and folds flat inwards and outwards, a bit like a book. The Flex S, on the other hand, has a more zigzag-like shape. It's meant to resemble an "S" — hence the name. The Flex S is another concept device Samsung showed off at MWC. It folds in a more zigzag-like way to make an "S" shape. Ryan Browne | CNBC It comes after Chinese tech giant Huawei last month launched its new Mate XT, a 3,499 euro ($3,678.56) smartphone with three screens, in international markets. Samsung stressed that its Flex G and S models were only concept devices — so don't expect to find them on shelves anytime soon. Still, it's a sign of where s ... Read full article.