It means that display light is being turned off and the device is in power save/sleep mode.
- Can I still use Email on my Nokia S40, S60 (Symbian) or Asha device?
- Why is the home screen widget indicating downloading and seems to be stuck in that state on my Nokia N97?
- My phone does not charge
- How can I recover/reset/restore my phone software?
- What can I do if my Nokia Symbian phone memory is low?