I received a text message without words. What happened?

Problem description:

I received a short message yesterday, but there was nothing in it. Look at characters like +92255. What happened?

Analysis:

There are several situations:

One possibility is that the mobile company lost it when it issued a document. Of course, this situation is not much;

Secondly, some illegal SP deliberately sent some blank information to mislead you to reply to the information query, and then deducted your RMB; From it;