Product: Programmable SMS
You are using the deprecated /SMS/Messages API endpoint, which supports up to 160 characters per message. To send up to 1600 characters per message, switch to our upgraded /Messages endpoint. ## Error - 21605
This error is specific to the deprecated /SMS/Messages API endpoint. When using this endpoint, your message body must be 160 characters or less.
You can send messages up to 1600 characters long by using the /Messages API endpoint.
For more info, please refer to our FAQ on message size constraints.
The SMS body contains too many characters.
Reduce the number of characters in your message body and review our FAQ on message size constraints.