How to speed up mobile phone

I found trick from the web, really speeds-up any* speed up symbian mobile phone.

I tested that on Nokia N70, N73

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.