OnePlus's foldable phone gimmick may have been silly, but it wasn't stupid

OnePlus's stunt unfolded exactly as intended. Before Samsung's highly-anticipated Unpacked event early last week, the mischievous social media team at OnePlus dropped a teaser on Twitter that almost derailed the media machine promoting the upcoming Galaxy Z Fold 3 and Z Flip 3 smartphones. It was a simple, short video that appeared to show a OnePlus foldable phone, with a galaxy of stars on the displays, followed by the numbers 8.11.21 (the date of Samsung's Unpacked event). 8.11 10am ET -- OneP...