*#06# IMEI
*#9999# firmware
*#9998# configuration
*#9997# selftest
*#9994# serial number (DANCALL HP 2731)
*#9993# adding "Engineering functions"

*#9990# battery monitor
M1599955 time to discharge

*#9000# SIM Lock
*#9001# Group SIM Lock
*#9002# Operator SIM Lock
*#9003# Network SIM Lock