Nokia Code function

• *#0000# Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release Date, 3rd Line : Compression Type .
• *#9999# Phones software version if *#0000# does not work.
• *#06# For checking the International Mobile Equipment Identity (IMEI Number) .
• *#746025625# Displays the SIM Clock status, if your phone supports this power saving feature "SIM Clock Stop Allowed", it means you will get the best standby time possible.
• *#92702689# Displays - 1.Serial Number, 2.Date Made, 3.Purchase Date, 4.Date of last repair (0000 for no repairs), 5.Life timer.

Source: http://www.programmerworld.net/articles/tips/nokia_codes.php