Possible causes:
  • The handset is switched off or otherwise unavailable.
  • The device does not have sufficient signal
  • The device cannot receive SMS (for example, the phone number belongs to a landline)
  • There is an issue with the mobile carrier
  • A wireless plan that does not support short code or "Premium" messages.
Please check:
  • Is the device powered on?
  • Does the device have sufficient signal? If not power the device off, wait 30 seconds, and then power it back up.
  • Is the device connected to the home carrier's network? We cannot guarantee message delivery on devices roaming off-network.