Drop the apps down so they're easier to scroll
If your short fingers make it difficult to comfortably access the upper rows of apps on the home screen, here a handy tip: double touch (read: do not press) the Home button. It’ll bump the top rows down about halfway.
Set your audio and video messages to self-destruct
You can set any video or audio messages that you text someone to disappear two minutes after they're watched or listened to. To set it up, go to Settings > Messages and scroll to the bottom.
Automatically respond to calls you can't take with a text
Whether you’re in a meeting, out to dinner, or simply ain’t got time for that, you can decline the call and shoot the caller a text by hitting the "Message" button above the "Slide to Answer" notification. Choose from a drop-down of default options including "Sorry, I can’t talk right now," "I’m on my way," and "I’ll call you later?" You can also add custom message options under Settings > Phone.