This page lists the error codes that can be returned by the webservice, click the error code for more information and potential solutions to common issues
HTTP Error code400
DescriptionDelivery reporting has been requested, but this is not supported to this "to" number by the carrier used to send messages from your "from" number, so your message could not be sent.
RemedyPlease don't request delivery reporting when you send messages to this "to" number from this "from" number.
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