Binary messages are those that require special encoding to get around a limitation in the number of characters that may be sent in a single SMS message.

In languages like Arabic, Chinese, Korean, Japanese, and Slavic, binary messages are employed to represent certain characters (e.g., Russian). These messages can be used to transmit ringtones, photos, or WAP Push messages.

Rather than sending plain text, a binary SMS message is frequently used to communicate data. Small files and rich material may be sent, as well as system settings and WAP data activation.