Apple released iOS 10.0.3 today, but only to the iPhone 7 and 7 Plus. As the version number indicates, there are no new front-facing features in today's build; instead, it focuses on bug fixes, specifically for cellular connectivity.
The update comes about four weeks after 10.0.2, which is still the version that most iOS devices should be running. That build, however, focused on fixes for the new Lightning EarPods that come bundled with Apple's latest iPhones.
iOS 10.1 has been in beta for the same amount of time, and it's currently up to its third build. Like all of the other updates that we're seeing, that one focuses on improvements to the new iPhones, bringing Portrait Mode to the 7 Plus.
If you've got an iPhone 7 or 7 Plus, you can grab iOS 10.0.3 by heading over to Settings -> General -> Software Update, and then following the onscreen instructions to install it. We recently reviewed the iPhone 7 Plus, and we found it to be extremely impressive.