A simplified method of assigning a call address to a PTT key for speed dialing in radio mode. The existing call addresses stored in memory are reviewed by the user and one of the call addresses is chosen as the default call address. This default call address is associated with a particular hot key, such as the PTT key. Thereafter, when the hot key is pressed to initiate a call without another call address currently pending, the default call address is used to initiate the call in radio mode. In preferred embodiments, the user may assign the call address to be the default without having to move the call address information from one memory location to another. Likewise, the user may change the call address assigned to be the default without having to move the call address information from one memory location to another. Thus, the present invention provides a simpler and less error prone procedure.