Found code reveals that Echo owners will be able to send SMS messages

If code found in the Amazon Alexa app is correct, Amazon Echo owners will soon be able to send SMS messages to friends or family using their Amazon smart speaker or the Alexa app. Echo owners would be able to create these texts using voice commands, and send these messages to anyone, even those not using an Echo device. Echo owners will use what is being called an Alexa number to make and receive SMS messages. This special number was cited several times in the discovered code.

Lines of code included statements like "My Alexa number is:" and "When you send messages, your contacts will receive ...