I have always wondered what that option is on my phone. Find your lost iPhone. Just use these quick simple steps to find the location of your iphone, or make your phone make a noise, even when it's on silent.
15 Things You Did Not Know Your iPhone Could Do. Did you change your mind about that text you just tapped in? Shake your phone, and an “Undo Typing” box will come up. If you change your mind shake it again and a redo typing box will pop up
Hold 0 to Get Degree Icon If your topic is related to weather or chemistry, you may need this function to present “degree”. Hold the number zero for several seconds, and the degree icon will show above.