speed up symbian phone

This trick I found from the web, really speeds-up any* symbian mobile phone.
First I thought this is a joke, but don't know how, it worked !!!
It must be a secret code for Nokia.
First change ur phone date to 03/04/2005
Go to Menu -> office-> To-do List.
Make a new to do note with following data :
Subject : Speed
Due date : 04/08/2005
Priority : High
Press Done, but don't Exit.
Now make another note with :
Subject : Qoukie
Due date : 04/08/2005
Priority : Low
Press Done & Exit to Stand-By screen.
Now go back again to To-do List.
Then press "options" & "mark as done"
( Do this to the notes in the order above )
Exit & update the phone date.



*tested it on phone nokia n70, n6600, N73 and N95.

**if you not see to-do-list, refer this step :
Go to Office->Calender->Options->New entry->To-do