Dell Vostro 3555 (Mid 2011) - Manual (Page 17)

Subscriber Identity Module (SIM)
Card
4
Removing The Phone Subscriber Identity Module (SIM)
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 it from the computer.
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