Faster volume up or down
Although this is a minor inconvenience, it’s an inconvenience nonetheless. Raising and lowering the volume on your iPhone takes much longer than you might prefer. If you don’t want to continue pushing the volume rocker to get the audio at the desired volume, here’s how to do it the quick way.
Press the volume up or down button. After the volume notification appears, take your finger and drag it to exactly where you want it. Release and wait for the notification to disappear, and you’re all set. This isn’t exactly a “hidden” feature, nor is it an Apple-only one, but it’s definitely worth knowing if you want to save a couple of seconds in your day.