Apple is now rolling out a fix for the issues that some were having with the iPhone 7 and the lightning EarPods that came with the phone. The controls on the Earpods were spontaneously activing on their own, causing songs to play/pause, skip, and Siri going off on its own. This was happening with both the headphone adapter, and the new ones with a lightning plug. @scttor @siracusa @atpfm this seems to happen with my lightning EarPods as well, not just adapted 3.5mm headphones Michael Cailler (@michaelcailler) September 18, 2016 The update also squashes a couple of other bugs...
Source: http://www.gsmarena.com/ios_1002_is_released_fixes_iphone_7_earpod_issue-news-20685.php