A method for providing a user interface (UI) includes displaying a character input UI, receiving a command to select a specific character on the character input UI, determining a character input mode from among a recommended character input mode and an accent mark character input mode based on the command, and displaying at least one of a first character input UI and a second character input UI according to the determined character input mode, wherein the first character input UI comprises recommended character items and the second character input UI comprises accent mark character items.