Sure, real 5G is up to three times faster than LTE, but there are a few caveats. As we discovered in Chicago, 5G doesn't always hold up when you're trying to use it indoors. Even a pane of glass can cause your signal to flicker between 5G and 4G. Verizon (Engadget's parent company) and Boingo are hoping to change that. The companies are working together to bring 5G Ultra Wideband service to indoor public spaces, like airports, office buildings and stadiums.