Meghan Brobowsky

Once a glimmer in the eyes of executives from Shenzhen to Silicon Valley, 5G now dominates a broad swath of the global supply chain—and the competition to control different parts of it is heating up. Equipment makers, smartphone sellers and chip designers are all vying for control of machines and services that use the fifth-generation wireless standard, which is becoming easier to find across parts of Asia, Europe and North America.