Dell Latitude E6220 (Mid 2011) - Manual (Page 19)

Subscriber Identity Module (SIM)
Card
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Removing The Subscriber Identity Module (SIM) Card
1. Follow the procedures in Before Working On Your Computer.
2. Remove the battery.
3. Press in on the SIM card to release it from the computer.
4. Grasp the SIM card and pull out to release from the computer.
Installing The Subscriber Identity Module (SIM) Card
1. Slide the SIM card into its compartment.
2. Install the battery.
3. Follow the procedures in After Working Inside Your Computer.
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