KB Liiv M is a mobile application that provides mobile communication services of the same quality as the three major telecommunications companies in Korea at a reasonable price. It is a platform that adds new value through the convergence of finance and communication. The app allows users to check their data usage, billing information, and membership benefits in real-time. It also provides a self-subscription service that can be used anytime, anywhere without waiting.

The app offers a guide to prepare for self-subscription and a chatbot service for those who need further assistance. It also provides a diagnosis of the user's current data plan and recommends a better plan for them. Moreover, the app notifies users of various events, gifts, coupons, and nearby membership stores. The app requires access to the device's media and storage space, phone number for ARS authentication, and optional access to the camera, location, and notifications.

Overall, KB Liiv M is a user-friendly application that provides convenient mobile communication services and financial benefits to users.