If you ever wondered why a locked iPhone won't let you decline an incoming call, Apple has a good reason for keeping this ...

While one phone call may have the option to either answer or decline, others simply show the 'slide to answer' bar instead.

Ever received a call from someone you don't want to chat with at the moment, stared blankly at the screen, and wondered why the Decline button always seems to disappear at the worst possible time? Don ...