SK Telecom has launched its Rich Communication Services (RCS) messaging service on Samsung smartphones. SK Telecom announced its new messaging service expands functions, though it does not require users to install new applications or subscribe to additional services. The service is available on Samsung Galaxy Note 9, the Galaxy S9 and the Galaxy S9+ smartphones through a software upgrade. The service will be expanded to the Galaxy Note 8, the Galaxy S8 and the Galaxy S8+ in February. The Galaxy S10, which is scheduled for launch in February, will also have this RCS function as a basic feature.