Samsung Galaxy Tab 8.9 LTE User Manual page 13

To install the SIM or USIM card,
1
Open the cover to the SIM card slot on the side of the device.
2
Insert the SIM or USIM card.
Place the SIM or USIM card into the device with the gold-coloured contacts facing down.
Do not insert a memory card into the SIM card slot.
3
Close the cover of the SIM card slot.
14
Assembling