NookPhone
From Nookipedia, the Animal Crossing wiki
The NookPhone is a phone the player receives at the beginning of Animal Crossing: New Horizons as part of the Deserted Island Getaway Package.
Opening the phone allows the player to access the camera, Nook Miles, DIY Recipes, Map, passport, Custom Designs and a phone to call other islanders with. Should the player get lost, there is also the ability to call a rescue service, operated by Mr. Resetti. Using it causes the player to reappear outside their house/tent.