Verizon was the first US carrier to essentially put an end to speculation about a Korea-exclusive 5G Galaxy S10, and just 24 hours later, AT&T follows suit with its own indirect confirmation of that highly anticipated device.Once again, the 5G-enabled Galaxy S10 is not mentioned by name, as America’s second-largest wireless service provider cryptically announces plans to “grow its mobile 5G device lineup with a 5G smartphone from Samsung in the first half of 2019.”