Yes, cell phones work on Disney Cruise Line ships, but you must be extremely careful to avoid exorbitant roaming charges. While at sea, the ship connects to a specialized satellite network called "Cellular at Sea." This service is significantly more expensive than land-based roaming; data can cost up to $15–$20 per megabyte, and calls can exceed $6 per minute. To avoid "bill shock," it is highly recommended to keep your phone in Airplane Mode with Wi-Fi turned on. Disney offers a complimentary "Navigator App" that allows you to chat with other guests on the ship and view the daily schedule for free once you are connected to the ship's guest Wi-Fi. For external communication, you can purchase various "Internet Packages" (Stay Connected, Basic, or Premium) which support social media, messaging, and email. If you have a provider like AT&T or Verizon, you can often purchase a "Cruise Package" in advance that provides a set amount of data and minutes for a flat daily fee. Always check with your carrier before you sail to see if they offer a specific Disney Cruise Line roaming plan to stay connected safely.