Nokia Lumia 820 User Manual page 8

Make sure the phone is switched off.
1. With the back of the phone facing you, place your thumb on the back of the phone next to the
camera lens.
2. At the top left corner, put your fingernail in the seam between the screen frame and the back cover.
Bend the cover until a side seam opens slightly.
3. Repeat on the other corner, and remove the cover.
4. If the battery is in, lift it out.
5. Push the SIM into the card slot until it locks into place. Make sure the contact area is face down.
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