Free messaging with in-Flight Connection includes text messages (SMS) and data messages using Facebook Messenger, WhatsApp, and iMessage. You can also use Twitter via SMS with in-flight texting. See Twitter support for SMS Twitter steps and Twitter account support.
For SkyMiles Members get free in-flight Wi-Fi on Delta and ON US you'll be able to use messaging apps like iMessage, Facebook Messenger or WhatsApp while using the free in-flight Wi-Fi. Cellular SMS is not supported while in-flight.
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