Learn how to insert and remove a SIM card from your device. Your cellular service is activated through your SIM card; without it you cannot use cellular features. Note that a SIM card tray removal tool may be needed.
Press the Card Insertion/Removal Tool into the pinhole of the card tray.
Remove the card tray from the phone.
Insert or remove the nano SIM card from the tray.
Slide the card tray back into the phone, making sure it's secure.