A method of testing a micro electro-mechanical device in the form of an ink ejection nozzle having an actuating arm that moves an ink displacing paddle when heat inducing electric current is passed through the actuating arm and having a movement sensor associated with the actuating arm. The processor is configured to detect an input corresponding to a menu request, to active a first menu on the display in response to the menu request, process navigation input that causes a menu bar of the active menu to become selectable, and to process selection input for selecting the menu bar when it is selectable. Each of the first and second compartments has a first side and a second side. The first RRC state is one of at least: CELL_PCH, URA_PCH and IDLE. When the angle of dip is changed, the predictive impact point is recalculated according to the new angle of dip, and the corresponding impact point indication is displayed. A payor may initiate a transaction without input from the payee.