Motorola secret code
*#300# list the software hardware version
*#06# EMEI
*#301# full keypad functional test
*#303# setting defoult language
*304#Set (of) engineering mod
*#304#Set (of) engineering mod
*#403# manufacturing infomation
19980722 unlock ur phone master code
19980722 master code
*#305# location
*#307# engineerig test mod
*#311# phone code change
*#400# Adc cal val*
*#403# adjust display contrast
*#3370# enhand full rate
*#3370# Deactivated enhanced full rate
*#3370# Deactivated enhanced full rate
*#72837726# confirm data save
Motorola defoult mean code 1234 ok
*#0000# save setting restore phone
