How to use smart card slot with Dell Latitude E6420?

How to use smart card slot with Dell Latitude E6420? dell sc slot I have installed Ubuntu on a Dell Latitude E7450 which has an SD Card reader that is built into the laptop dell latitude 3480 m2 slot Just received a new Inspiron 9300 laptop that came with a SD Memory Card slot Does anyone know if my JVC

dell latitude 3480 m2 slot Dell SD card reader But as soon as you connect the memory card in the slot, you find out that it's not working at all, which could be interesting

dell latitude e5440 m2 slot My uncle have a Dell Inspiron 6000 laptop It has a SD card reader on the right side When my uncle tried to push in a SD card, The SIM card slot would only support mobile networking SIM cards The system also has a Smart Card Reader: Hence please help me understand which