Archived:Using backlight and vibration in Java on S60 2nd Edition (Known Issue)
There are methods for using backlight and vibration both in the Nokia UI API (DeviceControl.flashLights(long duration) and DeviceControl.startVibra (int freq, long duration)) and in MIDP 2.0 (flashBacklight(int duration) and vibrate(int duration)). It is recommended not to use the Nokia UI API methods.
The MIDP 2.0 methods should be used. In software versions 3.42.1 and 4.09.1, only backlight is supported.