Apple has started rollout of their newest iOS version to users all over the world. iOS 10 brings a lot of improvements to iPhones and iPads and is being touted by Apple as the biggest iOS upgrade of all times. Apple Watch users can also upgrade to watchOS 3 starting today.
http://www.notebookcheck.net/Apple-iOS-10-Final-version-started-to-rollout-to-users.173999.0.html