Dell Latitude ST (Late 2011) - Manual (Page 23)

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Removing The SIM Card
1. Follow the procedures in Before Working On Your Computer .
2. Remove the label door .
3. Slide the SIM card holder to unlock the SIM card slot.
4. Flip the SIM card holder in an upward direction.
5. Pull the SIM card out of the SIM card holder and remove it from the computer.
NOTE: Close the SIM card holder after the SIM card has been removed from the computer.
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