Most iPhone users have probably experienced the annoyance, or even occasional embarrassment, of their cheek hitting the iPhone's "end call" button and accidentally hanging up on the person they’re talking to.
There's an easy way to avoid this, though: Lock the screen.
When your call has started and you're talking to someone, just click the iPhone's hold button at the top right of the phone. This will lock your phone but will not end your call.
Now, your cheek can't end your call. When you're ready to hand up, just unlock the screen by using the onscreen unlock slider and tap "end call." Problem solved.
