57Security• Password Lock: set a device lock password.• SIM Lock: enable or disable the SIM lock function.• SIM PIN: set whether or not to require a PIN whenusing the device.• Change PIN: change the current PIN.• Change PIN2: change the current PIN2.• Change Barring Password: change the current callbarring password.• Mobile Tracker: configure and change thepassword for the mobile tracker feature.Network Settings• Band Selection: select a band to use for cellularservice.• Network Options: set the network selection methodand set preferred networks.• HSDPA: enable or disable high-speed downlinkpacket access (HSDPA).• Restore Connections: restore all network settingsto factory defaults.• Operator Settings: select a cellular operator.• Bluetooth: activate or deactivate the Bluetoothfeature.• Wi-Fi: turn on or off Wi-Fi.• Certificates: view personal, intermediate, and rootsecurity certificates and their expiration dates.