Apple has programmed the iPhone such that pressing the Side button automatically ends active calls. This is convenient, but it might be frustrating if the call is cut off inadvertently because the Lock key was pressed. Disabling button-based call termination is a viable solution available on iOS devices. Here, we’ll take a look at what happens when you press the Power button on an iPhone to end a call.
What Happens to An iPhone Call when You Press the Power Button?

Many users like the ease of being able to end calls by pressing the Power button. While convenient, it can become an issue if the user repeatedly presses the button inadvertently, resulting in dropped calls. The Lock to End Call option can be disabled in the settings to prevent this from happening.
Remove iPhone’s Lock Screen to Complete a Call
Within the iPhone’s Accessibility options, you can disable the Power button’s ability to end calls. The procedure is as follows:
First, access the iPhone’s configuration menu.
Go to Settings, and then click Accessibility.
step is to pick Touch at this screen.
Turn off the Lock to End Call switch on the subsequent screen.
This concludes the discussion. No longer will hanging up on a call on your iPhone be accomplished by pressing the Side button. But it will turn off the ringer sound.
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When “Lock to End Call” Is Turned Off, Calls Are Abruptly Ended
By tapping the Side button on an iPhone, you can automatically end incoming calls. When the “Lock to End Call” setting is turned off, the screen lock feature will not end an active call but instead only mute any incoming calls.
Then, you can utilise the volume control and the power button (the same combo used to bring up the power menu). By doing so, you can end your current call or ignore an incoming one.
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iPhone Call Muting Instructions

Do you want to avoid rejecting the call outright, but you do want the iPhone to cease ringing or vibrating? There are three techniques to avoid answering an incoming call:
Aside button press to play (it will work when the Lock to End call is disabled).
You can dismiss the incoming call screen by swiping up from its current bottom position, which also mutes the ringer. To stop an incoming call from being audible, press either volume button while the iPhone is ringing.
Full-screen caller ID will be hidden. Even though the call is muted, you can still answer it by touching the flashing phone icon in the status bar. The iPhone also allows you to silently mute a single caller.
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To Sum Up
This is how I disabled the iPhone’s Power and Side buttons from rejecting or ending calls. Once the feature has been disabled, the appropriate key combination can be accessed from the Power menu to reject incoming calls. We also explored alternative ways to dismiss or mute incoming calls outside of tapping the Power button. Please use this information to better handle incoming calls on your iOS device.