Settings 81Location & securityChange the settings for securing your device and the SIMor USIM card, and GPS functionality.• Use wireless networks: Set the device to use thewireless networking for checking locations, if supportedin an application.• Use GPS satellites: Enable the GPS functionality forchecking locations, if supported in an application. Youcan view locations at street level by using the GPS.• Set unlock pattern: Activate the gesture unlock featurethat allows you to unlock the touch screen and keys bydrawing a specified character. ► p. 26• Require pattern: Set the device to require the unlockpattern you have set each time you turn it on. Bydoing this, you can prevent unauthorised people fromunlocking the device.• Use visible pattern: Set the unlock pattern to be visibleor invisible as you draw it.• Audible touch tones: Set the device to sound when youtouch the keys on the dialler.• Audible selection: Set the device to sound when youselect an application or option on the touch screen.• Haptic feedback: Set the device to vibrate when youtouch the keys.• SD card notifications: Set the device to sound when amemory card is recognised.• Orientation: Set whether or not to rotate the contentautomatically when the device is rotated.• Animation: Set the device to display animation whenyou switch between windows.• Brightness: Set the brightness of the display.• Screen timeout: Set the length of time the device waitsbefore turning off the display's backlight.