*#06# IMEI
*#9999# Firmware
*#9998# Configuration
*#9997# Selftest
*#9994# Serial number (DANCALL HP 2731)
*#9993# Adding "Engineering functions"
*#9990# Battery monitor
*#9000# SIM Lock
*#9001# Group SIM Lock
*#9002# Operator SIM Lock
*#9003# Network SIM Lock
M1599955 Time to discharge