Settings URL schemes:

Settings URL schemes:

Settings URL schemes:
Note: < i=OS 5.1 use prefs:. > 5.1 use app-settings:

app-settings:root=General&path=About
app-settings:root=General&path=ACCESSIBILITY
app-settings:root=AIRPLANE_MODE
app-settings:root=General&path=AUTOLOCK
app-settings:root=General&path=USAGE/CELLULAR_USAGE
app-settings:root=Brightness
app-settings:root=General&path=Bluetooth
app-settings:root=General&path=DATE_AND_TIME
app-settings:root=FACETIME
app-settings:root=General
app-settings:root=General&path=Keyboard
app-settings:root=CASTLE
app-settings:root=CASTLE&path=STORAGE_AND_BACKUP
app-settings:root=General&path=INTERNATIONAL
app-settings:root=LOCATION_SERVICES
app-settings:root=ACCOUNT_SETTINGS
app-settings:root=MUSIC
app-settings:root=MUSIC&path=EQ
app-settings:root=MUSIC&path=VolumeLimit
app-settings:root=General&path=Network
app-settings:root=NIKE_PLUS_IPOD
app-settings:root=NOTES
app-settings:root=NOTIFICATIONS_ID
app-settings:root=Phone
app-settings:root=Photos
app-settings:root=General&path=ManagedConfigurationList
app-settings:root=General&path=Reset
app-settings:root=Sounds&path=Ringtone
app-settings:root=Safari
app-settings:root=General&path=Assistant
app-settings:root=Sounds
app-settings:root=General&path=SOFTWARE_UPDATE_LINK
app-settings:root=STORE
app-settings:root=TWITTER
app-settings:root=General&path=USAGE
app-settings:root=VIDEO
app-settings:root=General&path=Network/VPN
app-settings:root=Wallpaper
app-settings:root=WIFI
app-settings:root=INTERNET_TETHERING
Implementation
Titanium

  Ti.Platform.openURL("app-settings:root=General&path=About");
Swift

UIApplication.sharedApplication().openURL(NSURL(string:"prefs:root=General&path=Keyboard")!)
Objective-C

[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"prefs:root=General&path=Keyboard"]];