How to steal a Minecraft PE skin?

Ok… So I'm not a big fan of the game myself. I used to be, but not so much anymore. My friend still loves the game. She recently made a skin and forgot to save it, so she applied it and if she changes her skin, it will be lost forever. She needs to change her skin for some reason, and wants to keep her old skin. I know that there's an easy way to steal PC skins, but how do you steal PE skins? (Note: I do not mean apply.)