How to set Apple's power button to hang up?

Apple's power button has the function of hanging up the phone by default. Press the power button once to mute the ringtone, and press it twice to hang up the call directly.

Other ways for Apple to hang up the phone:

Use SMS to reply to hang up (in this case, the mobile phone system must be upgraded to ios 6 or above. )

after an incoming call, you can see a small SMS icon next to the sliding answer, press and hold it, and then slide up to select a specific SMS content to reply to the other party and hang up the phone. If you want to customize the content of the short message, please open the settings and switch to the phone setting option. You can see the words "reply with information". Click on it to set the customized reply content.

Set the Do Not Disturb mode (this is also a new function above ios 6)

Turn on the Do Not Disturb setting at the top of the notification setting, which can be set according to your own needs.