Why is my phone saying no sim card

Question

Samsung Galaxy Mega

Released in June 2013, the Galaxy Mega is a 6.3" smartphone featuring a 720P display, dual-core processor, and an 8 MP camera.

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I recently got a new sim card, and when I put it in my phone it is saying no sim card. I put my old sim card in and it is sayin the same thing.

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haysam @haysam50143 crwdns2934065:0crwdne2934065:0: 1 · Answer 1 · 2015-12-10T02:43:17-07:00

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no sim card I do not know how could I are two of the card on the plate

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Shaw @blaghi crwdns2934065:0crwdne2934065:0: 1 · Answer 2 · 2016-10-02T02:29:57-07:00

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The SIM card rider is replaceable

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