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.
Open the micro SIM card slot cover.
Insert the micro SIM card until it clicks, or push in on the micro SIM card to release it and then remove it from the device.
Press the micro SIM card slot cover firmly closed, making sure it's secure.