Following codes are for D500, it might work for e720/E730(though it is dependent on phones firmware).

*#1111# S/W Version
*#1234# Firmware Version
*#2222# H/W Version
*#8999*8376263# All Versions Together

*#8999*8378# Test Menu
*#4777*8665# GPSR Tool
*#8999*523# LCD Brightness
*#8999*377# Error Menu
*#8999*327# EEP Menu
*#8999*3825523# Don’t Know.
*#8999*667# Debug Mode
*#92782# PhoneModel (Wap)
#*5737425# JAVA Mode
*#2255# Call List
*#232337# Bluetooth MAC Adress
*#5282837# Java Version

#*4773# Incremental Redundancy
#*7752# 8 PSK uplink capability bit
#*7785# Reset wakeup & RTK timer cariables/variables
#*1200# ????
#*7200# Tone Generator Mute
#*3888# BLUETOOTH Test mode
#*#8999*324# ??
#*7828# Task screen
#*5111# ??
#*#8377466# S/W Version & H/W Version
#*2562# Restarts Phone
#*2565# No Blocking? General Defense.
#*3353# General Defense, Code Erased.
#*3837# Phone Hangs on White screen
#*3849# Restarts Phone
#*3851# Restarts Phone
#*3876# Restarts Phone
#*7222# Operation Typ: (Class C GSM)
#*7224# !!! ERROR !!!
#*7252# Operation Typ: (Class B GPRS)
#*7271# CMD: (Not Available)
#*7274# CMD: (Not Available)
#*7337# Restarts Phone (Resets Wap Settings)
#*2787# CRTP ON/OFF
#*2886# AutoAnswer ON/OFF
#*3737# L1 AFC
#*5133# L1 HO Data
#*7288# GPRS Detached/Attached
#*7287# GPRS Attached
#*7666# White Screen
#*7693# Sleep Deactivate/Activate
#*7284# L1 HO Data
#*2256# Calibration info? (For CMD set DEBUGAUTONOMY in cihard.opt)
#*2286# Databattery
#*2527# GPRS switching set to (Class 4, 8, 9, 10)
#*2679# Copycat feature Activa/Deactivate
#*3940# External looptest 9600 bps
#*4263# Handsfree mode Activate/Deactivate
#*4700# Please use function 2637
#*7352# BVMC Reg value (LOW_SWTOFF, NOMINAL_SWTOFF)
#*2558# Time ON
#*3370# Same as 4700
#*3941# External looptest 115200 bps Read more »

Samsung sph-n240, n400, a460, a500, etc Nam Programming:

Nam Set: ##Spc

Test Mode: 47*869#1235

Debug Menu: ##33284,ok

Service Menu: Menu+8+0 (#889)

Reset (Life time, Clear Memory, etc): ##786,ok

A-key: ##2539,ok

Label Selection: ##3882,ok

Label(Home, Work, etc) : **523,ok

NGG Setting (Gateway, etc.): ##2769737,ok

Vocoder: ##8626337,ok

CAI Change: ##7738,ok

Enable TTY: ##889,ok Read more »

#*0000#
#*0400#
#*1200# – AFC DAC Val
#*1300# – IMEI
#*1400# – IMSI
#*1700# – ( ) Command #*1700 Executed
#*1800# – ( ) Command #*1800 Executed
#*1900# – ( ) Command #*1900 Executed
#*2000# – ( ) Command #*2000 Executed
#*2100# – ( ) Command #*2100 Executed
#*2200# – ( ) Command #*2200 Executed
#*2252# – Current CAL
#*2255# -
#*2256# – Calibr.-Info
#*2282#
#*2285#
#*2286# – Databattery
#*2337# – ( ) Permanent Registration – Not Yet Implemented
#*2355#
#*2400# – ( ) Command #*2400 Executed
#*2474# – For CMD Set – DEBUGBATTERY in cihard.opt
#*2527# – GPRS Switching Set to class {4/8/9/10}
#*2558# – Time ON
#*2562#
#*2565#
#*2677# – AMR State: {None / Full Rate}
#*2679# – Copycat Feature: {ACTIVATED/DEACTIVATED}
#*2787# – CRTP {ON/OFF}
#*2834# – Audio path Mobile Normal
#*2836# – AVDDSS Management: {DEACTIVATED/ACTIVATED}
#*3230# – Trace Enable DCD disable
#*3231# – Trace disable DCD Enable
#*3232# – Current Mode {Trace enabled/DCD enabled}
#*3270# – DCS Support: {DEACTIVATED/ACTIVATED}
#*3282# – Data: {DEACTIVATED/ACTIVATED}
#*3333#
#*3353# – General Defence Code Erased
#*3370#
#*3377#
#*3476# – EGSM: {DEACTIVATED/ACTIVATED}
#*3676# – Flash Volume Formated
#*3683#
#*3737# – Some Codes
#*3777#
#*3779#
#*3825# – ( ) Command #*3825 Executed
#*3837#
#*3849#
#*3851#
#*3876#
#*3877# – Dump of SPY Trace

Read more »