How to insert and remove the SIM card on my Samsung Galaxy S II 4G

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These steps show you how to correctly insert the SIM card into your Samsung Galaxy S II 4G.
1. Using your thumb or finger, lift up the back cover using the small notch at the top of the phone.
2. Insert the SIM card with the metal contacts facing down, and then slide it into the SIM card slot.
3. Line up the gold contacts on the battery with the contacts on the smartphone. Insert the top part of the battery first, then push the battery down into place.
4. Line up the battery cover hinge with the designated holes inside the smartphone, then push the cover down until it clicks into place.