More trifold smartphones are popping up after Huawei’s $3,600 splash newsthirst.
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…