We got a post card some time back from Amex Platinum, and I hung on to it; it is advertising WorldRoam rental cell phones. The url it gives for more information is:
🚢 Cruise with your favorite Keene Luxury Travel Staff Member! 💰 5% KLT Reward plus Shipboard Credit available (amount varies per voyage)! 💲 Offering Enhanced KLT Rewards on voyages hosted by Ngaire & Clay!