Why did my mobile phone text message come for a flash and then disappear?

Hello ~ In short, there are two possibilities!

First, you installed software with firewall or blacklist function, and the short message was intercepted.

The second is the current popular (flash message). As long as it is a smart phone, it will automatically display all the content after being kind, and then automatically eliminate it. No inbox! Maybe it's a prank of your friend. Don't worry, it won't interfere with normal use!