hi friends yesterday i got know about some Nokia codes.Well i have not tried yet but i read it somewhere. Like imagine ur cell battery i slow and u have to call urgent .......... then there is reserve battery in nokia.Ur cell will restart with reserve and show 50% increase in battery status.
This reserve will get charge when u charge ur cell next time.

26**61*number# turns on "no reply" diverting to the phone number entered.

26**21*number# turns on "all call" diverting to the phone number entered.

11*#2640# displays the security code in use.