Nokia Lumia 820 User Manual page 8

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