39Using the WWAN Feature(Optional)A WWAN (Wireless Wide Area Network) uses mobile telecommunicationcellular network technologies to transfer data. The WWAN module of yourcomputer supports 3G.NOTE: Your model only supports data transmission. Voice transmission isnot supported.Installing a SIM Card1. Turn off the computer and disconnect the AC adapter.2. Carefully place the computer upside down.3. Unfasten four screws and flip open the cover. Be careful not to pull onthe cables connected to the cover.4. Locate the SIM card slot. Locate the SIM card slot. Slide the locking tabinward to unlock (). Lift the slot up and, noting the orientation, insertthe SIM card into the slot (). Slide the locking tab outward to securethe SIM card in place ().