Executives from some of the nation’s biggest tower companies, including Crown Castle, offered differing views on whether Massive MIMO antennas represent a big new revenue stream. Earlier this year, in response to a question during an earnings call about possible revenue streams from Massive MIMO antennas, Crown Castle’s CEO Jay Brown said that, "They could solve the same thing by using more sites or different types of equipment depending on what spectrum bands they use and how they choose to do it. So just in isolation, I wouldn't necessarily assume that would be a large revenue driver for us."