At a Mobile World Congress keynote panel in late February on the timing of 5G devices , Qualcomm President Cristiano Amon declared with confidence, “The phones are ready; we’re just waiting for the networks.” About an hour later, in a briefing room a mere 10 feet below that keynote hall, AT&T Chief Technology Officer Andre Fuetsch told CNET, “The issue is devices. Frankly, we’re waiting on the devices.” After years of work on 5G networks, hyped as the life-changing foundation for tech trends like augmented reality and telemedicine, the super-fast wireless technology has finally gone live. Carriers are turning on their networks, and virtually every major Android handset maker has talked up plans to launch a 5G device this year. Now playing: Watch this: Galaxy S10 5G camera, 5G demo at MWC 2019 5:18 There’s been a whirlwind of 5G news. This spring, 5G networks went live in the US and South Korea. In the US, Verizon turned on its 5G service in early April in Chicago and Minneapolis. Sprint followed in June, with 5G service in Atlanta, Dallas-Fort Worth, Houston and Kansas City. And various handset makers, including Samsung and LG, have started selling their first 5G devices. T-Mobile’s…