The most-used medium by Millennials? Radio. 2015-12-13 Liquid Newsroom Media Life Magazine :: It’s not TV, though 18-34s spend the most time with that, or digital and mobile, though they’re gaining. A new Nielsen report finds radio has a wider reach. Read Toni Fitzgerald, www.medialifemagazine.com Advertisements Share this:TwitterFacebookLike this:Like Loading... Related The most-used medium by Millennials? Radio.