1. A system to handle multiple calls on a user equipment (UE), the system comprising: a plurality of graphical user interfaces (GUIs), each GUI associated with (1) a predetermined number of callers and (2) a predetermined call type designator, each of the plurality of GUIs comprising: an answer group comprising a plurality of function buttons associated with answering an incoming call; and a reject group comprising a plurality of function buttons associated with rejecting the incoming call; wherein the system automatically selects a GUI from the plurality of GUIs based at least in part on a current number of active calls and the call type designator of the incoming call.