Wiko GOA - Manual (Page 9)

Getting Started
~ Inserting the SIM Cards
GOA: The SIM cards are placed one on top of the other
in the SIM card holder. The top SIM card (slot 1) must
be inserted in the direction shown in the drawing on
the right of the holder (with the SIM card contacts
facing down). To insert the bottom SIM card (slot 2),
remove the rail at the bottom of the holder using the
button on the left, slide in the SIM card in the direction
shown in the drawing on the left of the holder (with the
SIM card contacts facing up), and carefully place the
rail back in its slot.