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Error 21703

Error - 21703

The Messaging Service does not have a phone number available to send a message.

The Messaging Service does not have a phone number available with the required capabilities to send a message.

Possible Causes

  • You have phone numbers or short codes in your Messaging Service, but none of them are capable of sending the requested message or media to this recipient

Possible Solutions

  • Add a number to your Messaging Service with the required capabilities