A methods and apparatus for transmitting data are provided. The method includes receiving a call signal to be transmitted to a receiver including sender and receiver information associated with the call signal from a sender; confirming a relationship between the sender and the receiver that exists in at least one server; requesting sender data associated with the sender from the at least one server to which the sender is subscribed based on the relationship between the sender and the receiver to the at least one server; receiving the requested sender data from the at least one server; and transmitting the received sender data to the receiver.