4.Remove the WWAN module (3) by pulling it away from the slot at an angle.
CAUTION: To prevent an unresponsive system, replace the wireless module only with a wireless module authorized for use in the computer by the governmental agency that regulates wireless devices in your country or region. If you replace the module and then receive a warning message, remove the module to restore computer functionality, and then contact technical support through Help and Support.
NOTE: WWAN modules are designed with a notch (4) to prevent incorrect insertion into the WWAN module slot.
Reverse this procedure to install a WWAN module.
58 Chapter 4 Removal and replacement procedures