Samsung unveils foldable Galaxy Z phone, challenging Apple design and tech

SEOUL/SAN FRANCISCO (Reuters) - Samsung Electronics on Tuesday unveiled a square-shaped foldable smartphone, its second try at a novel technology that the Korean cell phone maker hopes will set it apart from rivals Apple Inc and Huawei.The foldable-glass Galaxy Z Flip, which looks like a large makeup compact folded up and expands to look like most smartphones, features foldable glass and will come in purple, gold and black, executives said in San Francisco. Last year's Galaxy Fold, a larger unit..