21621: The 'From' number has not been enabled for MMSERROR: 21621error-21621 page anchorERROR Error - 21621error---21621 page anchor The 'From' number has not been enabled for MMS messagingthe-from-number-has-not-been-enabled-for-mms-messaging page anchorThe 'From' phone number does not appear to be a phone number that you can send MMS messages from