Samsung will apparently send text messages to the Note 7 users about the latest order of FAA ( Federal Aviation Administration ), which bans all versions of Galaxy Note 7 to be carried in any US flight.
As far as we know, the purpose of the message is to notify the Note 7 users, who, by the way, should have been returned their phones by now. So that, they will not encounter with any surprises when they try to fly. Because, they will need to choice between their phone or their flight to their desired destination. However, my guess is that the other purpose of the message is to encourage the users.
It will also take less than 20 hours for Samsung to send this message.