Display IMEI number
*#06#
Display current firmware
*#1234#
Diagnostic and general settings mode
*#*#4636#*#*
Factory soft reset
*#*#7780#*#* or *#7780#
Factory hard reset to ROM firmware default settings
*2767*3855#
To display product code
*2767*4387264636#
Display/change CSC code
*#272*imei#*
or *#272*HHMM#*
GPS test settings
*#*#1472365#*#*
Service mode main menu
*#*#197328640#*#*
SW & HW Info
*#12580*369#
ADC Reading
*#0228#
Ciphering Info
*#32489#
Bluetooth Address
*#232337#
Bluetooth Test Mode
*#232331#
WLAN MAC Address
*#232338#
WLAN Test Mode
*#232339#
Vibra Motor Test Mode
*#0842#
Real Time Clock Test
*#0782#
Audio Test Mode
*#0673#
General Test Mode ( LCD Test )
*#0*#
RF Band Selection
*#2263#
Diagnostic Configuration
*#9090#
USB I2C Mode Control
*#7284#
USB Logging Control
*#872564#
GCF Configuration
*#4238378#
Audio Loopback Control
*#0283#
GPS Control Menu
*#1575#
LBS Test Mode
*#3214789650#
RIL Dump Menu
*#745#
Debug Dump Menu
*#746#
System Dump Mode
*#9900#
Sofware Version Info
*#44336#
Melody Test Mode
*#0289#
TSP / TSK firmware update
*#2663#
NAND Flash S/N / Unique Number
*#03#
Light Sensor Test Mode
*#0589#
Proximity Sensor Test Mode
*#0588#
Data Create Menu
*#273283*255*3282*#
Data Create SD Card
*#273283*255*663282*#
Data Usage Status
*#3282*727336*#
Remap Shutdown to End Call TSK
*#7594#
Camera Firmware Update
*#34971539#
WLAN Engineering Mode
*#526#
WLAN Engineering Mode
*#528#
Camera Firmware Menu
*#7412365# or *#*#34971539#*#*
*#80# (GPS Satellite)
Test History
*#07#
GCF Mode Status
*#3214789#
Auto Answer Selection
*#272886#
OTA Update Menu
*#8736364#
HSDPA/HSUPA Control Menu
*#301279#
Quick Test Menu
*#7353#
Sellout SMS / Product CODE view
*2767*4387264636#
View Phone Lock Status
*#7465625#
Configure Network Lock MCC/MNC
*7465625*638*#
Insert Network Lock Keycode
#7465625*638*#
Configure Network Lock NSP
*7465625*782*#
Insert Partitial Network Lock Keycode
#7465625*782*#
Insert Network Lock Keycode SP
*7465625*77*#
Insert Operator Lock Keycode
#7465625*77*#
Insert Network Lock Keycode NSP/CP
*7465625*27*#
Insert Content Provider Keycode
#7465625*27*#

credit: mod2xtreme.com