Samsung Galaxy S II GT-I9100 User Manual page 12

3
Insert the SIM or USIM card with the gold-coloured
contacts facing down.
Do not insert a memory card into the SIM card slot. If
the memory card becomes lodged in the SIM card slot,
you must take your device to a Samsung Service Centre
to have the memory card removed.
4
Insert the battery.
5
Replace the back cover.
Assembling
12