Your iPhone Has A Secret Undo Button

This function isn't meant to be a secret, but in my experience most iPhone users don’t know about it and it can save a lot of headaches. If you ever make a mistake typing, deleting, cutting, or pasting, here’s what to do. Just shake your phone like you’re furious. (This will not be hard.) Click undo, and your text will be restored.

 [Via - businessinsider, slate]