sim card
Plural
SIM cards
1
a small, removable card that stores data for one's mobile device and identifies one to the network
- She inserted the new SIM card into her phone and activated it with her provider.
- He swapped his SIM card when he traveled abroad to avoid roaming charges.
- The phone wouldn't recognize the SIM card, so he had to try another one.
- Each phone line requires its own SIM card to connect to the network.
- When she upgraded her phone, she transferred her SIM card to keep the same number.