Millennials, one of the largest generational groups in the U.S., on par with the Baby Boomers, are also the largest group of smartphone owners, says Nielsen in a report out today. And their adoption of the devices is still growing: by the second quarter of this year, 85% of those aged 18 to 24 owned a smartphone, and 86% of those aged 25 to 34 did. That’s up from 77% and 80%, respectively, over the same time last year. It’s worth also pointing out, on the eve of Apple’s big iPhone 6 reveal next week, that the smartphone in question is more likely to be an Android phone. Nielsen notes that over half (52%) of U.S. smartphones run Android, with Apple iOS accounting for a 42.7% share, and “other” OS’s (Windows Phone, Blackberry, etc.) making up the rest. But while it didn’t break out the number of Millennials specifically who chose Android over iPhone, earlier research from comScore this year did. And it, too, found that Android dominated, with half of Millennials using Android, a