“service unavailable” or "service access denied" message 

Troubleshooting texting your photos code

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• Contact your mobile carrier and make sure you have "shortcode texting enabled" with your plan.
  (It usually is unless you've told them to turn it off)

• Make sure you have a cell signal.

• Double check that you are texting to the correct number: 90738  and then typing your specific code in the message