Patent ID: 7778670

Claim:
A mobile telecommunication handset for recognizing at least one card capable of facilitating a telecommunication service with a network, the mobile telecommunication handset comprising: a socket for inserting first and second cards, wherein the second card is inserted into the socket after the first card is inserted and removed from the socket; a memory for storing information related to the first and second cards; and a controlling unit configured to selectively perform a call using one of the stored information of the first card and information of the inserted second card according to a menu selection, wherein the controlling unit is further configured to display a menu for selecting information related to one of the first and second cards if the information of the second card is stored in the memory, wherein the information related to the second card is temporarily stored in the memory if a specific key is pressed prior to the second card being inserted into the socket, and is deleted after a specific amount of time elapses or when the second card is removed from the socket.