Why did you receive an empty message at the same time?

Let me tell you something about my experience. My old mobile phone has never been touched in my pocket, and then I received a text message from my sister: Ask me what's wrong, and always send her the same text message. As soon as I saw more than 20 identical messages sent to her, I was surprised and turned them off quickly.

So, maybe it's also the fault of the temporary software of the mobile phone.