Cunard Line does provide mobile phone services on its ships, allowing passengers to stay connected while at sea. However, it is important to note that the availability and quality of the service can vary depending on factors such as the ship's location and the satellite network coverage. Passengers can usually send and receive calls and text messages and may have limited access to mobile data. It is advisable for travelers to check with their mobile service providers regarding international roaming charges, as these can be notably higher when using mobile phones on a cruise ship. Additionally, Cunard encourages passengers to be mindful of fellow travelers while using their phones in public areas. For the most current information on mobile phone usage, it is advisable to look on the Cunard website or the specific ship’s page.