Nokia codes

version information - *#0000#
IMEI number - *#06#
service information - *#92702689#
restart and save batteries, a bit lesser ---- [30%] - *4720#
restart and gain --- suck more batteries [30%] - #4720#
Better sound quality {sucks more batteries} - *3370#
Turn off better quality {saves batteries} - #3370#
simclock testing & disabling - *#746025625#