1. Turn off iPhone.
    Note: A Micro-SIM card is required in order to use cellular services when connecting to the AT&T network.
    device 2842/1411497.jpg
  2. Remove or insert the SIM card tray using a paper clip or SIM eject tool.
    device 2842/1411498.jpg
  3. Remove or insert the SIM card into the SIM card tray.
    device 2842/1411499.jpg
  4. Turn iPhone back on.
    device 2842/1691032.jpg
  5. If a SIM is not in the device, "No SIM" will display at the top of the screen.
    device 2842/1691033.jpg