International plans refer to mobile phone plans that allow users to make calls, send texts, and use data while traveling outside their home country. These plans are designed to help travelers avoid high roaming charges by providing a set amount of minutes, texts, and data for use abroad. Many mobile carriers offer international plans, which can be purchased as add-ons to existing plans or as standalone options. Users can choose from various packages based on their travel needs, such as duration of stay and countries visited, ensuring they stay connected without incurring excessive costs.