Universal user interface for a cellular mobile telephone

A mobile radio terminal includes a display for outputting at least one menu. The menu includes at least one branch for processing telephone calls. Each of the branches includes at least one option for choosing a corresponding action to be performed by the radio terminal, the corresponding actions including causing a successive branch to be displayed and performing a terminal function. The mobile terminal includes a selection mechanism for designating one of the options. A first key is included for confirming selection of the option designated by the selection means, so as to move forward through the menu to a succeeding branch and perform the corresponding action chosen by the confirmed option, and for originating and answering telephone calls. A second key is included for rejecting selection of the option designated by the selection mechanism, so as to move backward through the menu to a preceding branch, and for terminating telephone calls.