iOS 10 is here, and it's packing a number of very cool new features. To activate some of those features -- like sending read receipts in Messages or having Siri announce calls -- you'll need to tweak a few settings. A few other new options will change how your device behaves with iOS 10. Let's dive right in! Here are 10 settings you'll want to check out as soon as you update. 1. Rest Finger to Ope