For those who don't have a wifi package and do use the Celebrity app to text. You set your phone to airplane mode. Then you turn your wifi on. Select Celebrity guest. log in the same way to use the app to access activities, menus, etc. To access the text/chat feature you click the bubble with 3 dots located in the upper right part of the screen. You need to add the passengers you want to text/chat with. The app sends them a chat request and they need to click on their end in order for the 2 of you to be able to communicate using the app. We found it very easy to text once we used it a couple of times.