Hang Up a Phone Call on the iPhone by Tapping the Power Button
Many of us use our iPhones for so many tasks that it’s easy to overlook some of the simpler functionality of the device, like making and ending phone calls. With that in mind, we’ve got a nice trick to hang up an active call faster, without having to touch the devices screen at all. It’s incredibly simple:
Hang up a call instantly by tapping the Sleep / Power button
Yes, the sleep/lock/power button at the top of the iPhone can also be used to hang up a call, without having to rely on touching the iPhone screen.
No Touch Screen Usage = Works with Cracked Screens
This is valuable for several reasons: it’s faster than tapping “End Call”, it can be done with a simple finger tap without looking at the screen, and it works even if the iPhone touchscreen is not working due to a hardware failure or a completely cracked screen that has the lower portion of the display unresponsive to touch.
You’ll also be able to make phone calls in cold weather easier, or if you’re wearing gloves that aren’t touchscreen friendly. Just use Siri to make the initial phone call, then use the top button to end the call, all while keeping your toasty gloves on the entire time.
Additionally, it works to hang up a call even if tapping on the “End Call” screen button doesn’t work, which seems to be an odd Phone app bug that happens at random for some users.
As some readers have pointed in the comments, the functionality is slightly different depending on how you are using the iPhone during the call. In order for the iPhone call to hang up and end the active call, you must be using the iPhone with an active phone call in handset mode (that is, held up to your ear how most people use a phone). If you have an active call with speaker phone mode turned on, or are using an AUX cable attached to the iPhone, pressing the power button will result in the screen locking instead of hanging up.