These are generic codes that work on most Nokia handsets:-

 

Show IMEI - *#06#

Show Firmware Version - *#0000#

Warranty Menu - *#92702689#

Activate EFR - *3370#

Deactivate EFR - #3370#

Activate HFR - *4720#

Deactivate HFR - #4720#

Display SIM Clock Status - *#746025625#

Reset Timers & Game Scores - *#73#

Production Serial Number - *#7760#

Own Number (Vodafone only) - *#100#

Format Phone (Symbian) - *#7370#

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