Queue missing an outbound SMS number
You start to send an SMS message and receive the following message:
When you send an SMS message, you send it on behalf of a queue. You must be a member of this queue and the queue must have an outbound SMS number associated with it. The outbound SMS number indicates to the recipient who the SMS message is from. For more information about configuring queues, see Edit or delete queues.
For more information, see Send an SMS message.