Reference
Notes on the SIM Card
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Make sure the power of your tablet device is turned off before inserting or removing the SIM card.
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Do not press the SIM card more than necessary when inserting or removing a SIM card.
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If you remove the SIM card right after using your tablet device, the SIM card may be warm. This is normal and does not indicate a malfunction.
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Avoid exposing the SIM card to very cold, hot, humid places.
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Do not touch the contacts or terminals with your fingers or metal objects. If dirty, wipe the card with a soft cloth and keep it clean.
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Do not drop, press, or bend the SIM card.
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Do not insert the SIM card with labels or stickers in place.
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