What does anonymous SMS mean?

Because it contains MMS content, you will be prompted to download it.

The received anonymous SMS needs to be downloaded, because the content contains MMS content, which cannot be read in the form of SMS. It must be downloaded now, so there will be a requirement for SMS to be downloaded.

Short message: ShortMessageService, short message service for short, refers to the text or digital information directly sent or received by users through mobile phones or other telecommunication terminals. The number of characters that users can receive and send short messages at a time is 160 English or numeric characters or 70 Chinese characters.