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 and depending on the device you might need a Micro SIM card.
1.
Remove the phone's back cover.
2.
Remove the battery.
3.
Slide the micro SIM card firmly into the micro SIM card slot.
4.
Replace the battery.
5.
Replace the phone's back cover by pressing the edges of the cover to the phone.