Unsupported destinations are destination phone numbers in a country that doesn't support MMS, or a phone number or handset that doesn't support MMS. Requests to send MMS messages to unsupported destinations return an HTTP 400 error response.
Unsupported destinations are destination phone numbers in a country that doesn't support MMS, or a phone number or handset that doesn't support MMS. Requests to send MMS messages to unsupported destinations return an HTTP 400 error response.