Too very often this, um, app responds with facebook's branded "Something went wrong™". For instance, can't run at all on Kindles, no matter what phone numbers you use. "Delete for me" is another great invention of these geniuses. It's a good trap when you want to quickly delete a message you've made a mistake in (you shouldn't want to edit your messages, why would you want it?). Because if you accidentally delete a mistake only for you, the world definitely looks better from your perspective.