A system and method for providing a user interface that allows users to change the active line on which an outgoing call may be placed. In example embodiments, upon detecting call screen interaction a line selection menu is displayed. The line selection menu contains a plurality of line identifiers, each line identifier uniquely identifying a corresponding one of the multiple communication lines accessible at the mobile device. A system and method is also presented for providing a call log for identifying call activity associated with a plurality of communication lines.