+ (UIDevice *)currentDevice;

@property(nonatomic,readonly,retain) NSString    *name;              // e.g. "My iPhone"

@property(nonatomic,readonly,retain) NSString    *model;             // e.g. @"iPhone", @"iPod touch"

@property(nonatomic,readonly,retain) NSString    *localizedModel;    // localized version of model

@property(nonatomic,readonly,retain) NSString    *systemName;        // e.g. @"iOS"

@property(nonatomic,readonly,retain) NSString    *systemVersion;     // e.g. @"4.0"

@property(nonatomic,readonly) UIDeviceOrientation orientation;       // return current device orientation.  this will return UIDeviceOrientationUnknown unless device orientation notifications are being generated.

@property(nonatomic,readonly,retain) NSUUID      *identifierForVendor NS_AVAILABLE_IOS(6_0);      // a UUID that may be used to uniquely identify the device, same across apps from a single vendor.

@property(nonatomic,readonly,getter=isGeneratingDeviceOrientationNotifications) BOOL generatesDeviceOrientationNotifications;

- (void)beginGeneratingDeviceOrientationNotifications;      // nestable

- (void)endGeneratingDeviceOrientationNotifications;

@property(nonatomic,getter=isBatteryMonitoringEnabled) BOOL batteryMonitoringEnabled NS_AVAILABLE_IOS(3_0);  // default is NO

@property(nonatomic,readonly) UIDeviceBatteryState          batteryState NS_AVAILABLE_IOS(3_0);  // UIDeviceBatteryStateUnknown if monitoring disabled

@property(nonatomic,readonly) float                         batteryLevel NS_AVAILABLE_IOS(3_0);  // 0 .. 1.0. -1.0 if UIDeviceBatteryStateUnknown

@property(nonatomic,getter=isProximityMonitoringEnabled) BOOL proximityMonitoringEnabled NS_AVAILABLE_IOS(3_0); // default is NO

@property(nonatomic,readonly)                            BOOL proximityState NS_AVAILABLE_IOS(3_0);  // always returns NO if no proximity detector

@property(nonatomic,readonly,getter=isMultitaskingSupported) BOOL multitaskingSupported NS_AVAILABLE_IOS(4_0);

@property(nonatomic,readonly) UIUserInterfaceIdiom userInterfaceIdiom NS_AVAILABLE_IOS(3_2);

- (void)playInputClick NS_AVAILABLE_IOS(4_2);  // Plays a click only if an enabling input view is on-screen and user has enabled input clicks.

IOS - [UIDevice currentDevice] name/model/localizedMode/systemName/systemVersion...../userInterfaceIdiom