Have you ever tried to do anything on your phone, while you're wearing gloves in the cold? It just doesn't work.
But now a mathematician in the UK has figured out, you don't need to freeze your digits just to write a text message in the cold. You can use something else!
Hannah Fry did a video that showed her using a sausage to send a note.
She says foods like sausages and pickles can store an electric charge and conduct it. That's how we're able to use our fingers on a touchscreen. It's the same principle.