BenQ P51 - Manual (Page 21)

Hardware setup 9
3. Pick up and raise the SIM card holder
in an upright position.
4. Hold the SIM card over the SIM card
holder ready for insertion. Make sure
you hold the SIM card so that the side
with the metal contacts will face
down when you close the SIM card
holder. (See the figure to the right for
reference.)
5. Insert the SIM card into the SIM card
holder. Make sure it goes in
completely.