I am not sure if you truly mean a SIM card or an SD card, since some people incorrectly use these interchangeably. Both are accessed by a small panel, usually on the side of your phone opposite your volume buttons. On my Motorola, it is on the left. It requires me to hook it with a fingernail and pull both out (away from the body of the phone) and down, so that it opens somewhat like a door. I hope this helps.
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