Xiaomi
Power Button Ends Call Setting auf Xiaomi
On most phones, ending a call means tapping the on-screen hang-up button. MIUI adds an accessibility option that lets you finish a call by pressing the power button instead, which is faster when you are holding the phone one-handed or wearing gloves.
This setting lives under accessibility rather than the calling settings, so many users never come across it. Once enabled, a single press of the power button during an active call ends it immediately, without needing to look at the screen.
Where to find it
Open Settings ➔ Additional settings ➔ Accessibility ➔ Physical, then enable or disable Power button ends call.
Keep in mind that once this is active, pressing the power button during a call always hangs up, even if you meant to lock the screen or check the time. If you tend to press the power button out of habit while talking, leave this option off to avoid accidental disconnects.