Multi-language unicode messaging

A standard text message using the GSM alphabet can contain up to 160 characters (140 bytes). This works well for these types of messages; however, if you want to send a message that does not use the GSM alphabet, such as Chinese or Arabic for example, the message must be sent as Unicode.

An SMS message sent using Unicode characters is limited to a maximum of 70 characters. To send a message as Unicode, the Unicode parameter must be set to 1.

Values set are




Off – Default status


On – Delivers the text as two-byte Unicode

If this parameter is set, the message text must be in hex format. We expect UCS-2 (Big Endian) character set.

You can view the Parameters list page to see the name of the parameter for the API you are using.