Dieter Bohn / The Verge:
How Samsung managed to waterproof the Galaxy Z Fold3 and Z Flip3, primarily using Armor Aluminum, tape, and goo, while adding S Pen support — I was not expecting Samsung’s third generation of folding phones to be water-resistant. — The new Galaxy Z Fold 3 and Galaxy Z Flip 3 have just as many moving parts as previous generations.