A mounting socket includes an insulating socket body provided with a card insertion recess, a plurality of first terminal receiving openings and a plurality of second terminal receiving openings. The card insertion recess extends over a portion of the socket body provided with the second terminal receiving openings. The first terminal receiving openings are provided in a remainder of the socket body. Memory card connecting terminals are arranged in the first terminal receiving openings and extend above an upper surface of the socket body. Subscriber identification module card connecting terminals are arranged in the second terminal receiving openings and extend into the card insertion recess. A metal separating plate substantially covers the subscriber identification module card connecting terminals and defines a top surface of the card insertion recess. A metal card housing substantially covers the memory card connecting terminals.