HTC secret Code

Tested/Working Code:

##775# – EPST/PRL – PRL Settings
##786# – EPST – Status Menu
##3282# – EPST – Data Programming Menu (User Name, Advanced, Restore, Enable HFA, DSA Server, MMSC URL)
##2539# – EPST/A-Key – Data A key menu
##7738# – EPST/P_Rev – Protocol Revision
##8626337# – EPST/Vocoder – Unsure
##33284# – Debug – Debug Menu – (Debug Screen, Test Calls, RC Data, HDR/1X Selection, Voice Privacy, DTMF Set, Korea Mode Set)
##3424# – Diagnostic – Connect to phone in diag mode
##4772579# – Reset the GPS
##72786# – changes DSA back to Factory
##889# – enables TTY
*#*#34971539#*#* – update firmwire
*#*#7594#*#* – change the End Call / Power button action
*#*#273283*255*663282*#*#* – code opens a File copy screen where you can backup your media files
*#*#197328640#*#* – enter into Service mode
*#*#232339#*#* – WLAN test (Use “Menu” button to start various tests)
*#*#526#*#* – WLAN test (Use “Menu” button to start various tests)
*#*#528#*#* – WLAN test (Use “Menu” button to start various tests)
*#*#7780#*#* – Factory reset
*2767*3855# – Factory Format
*#*#232338#*#* – Shows WiFi MAC address
*#*#1472365#*#* – GPS test
*#*#1575#*#* – Another GPS test
*#*#232331#*#* – Bluetooth test
*#*#232337#*# – Shows Bluetooth device address
*#*#8255#*#* – launch GTalk Service Monitor.
*#*#4986*2650468#*#* – PDA, Phone, H/W, RFCallDate
*#*#1234#*#* – PDA and Phone
*#*#1111#*#* – FTA SW Version
*#*#2222#*#* – FTA HW Version
*#*#44336#*#* – PDA, Phone, CSC, Build Time, Changelist number
*#*#0283#*#* – Packet Loopback
*#*#0*#*#* – LCD test
*#*#0673#*#* OR *#*#0289#*#* – Melody test
*#*#0842#*#* – Device test (Vibration test and BackLight test)
*#*#2663#*#* – Touch screen version
*#*#2664#*#* – Touch screen test
*#*#0588#*#* – Proximity sensor test
*#*#3264#*#* – RAM version

—– Was only able to get the following working on CM6 Rom —– 
*#*#4636#*#* – Phone Information – “Phone information, Battery information, Battery history, Useage statistics, Wifi information” (froyo only)

Confirmed not Working:

##UPST# – modem directory
##778# – EPST – Advanced Programming

Unverified code:

##37872# – Full Speed USB Mode – Enable/Disable
##3386# – DDTM – Enable/Disable
*#0011# Service menu
*#0228# Battery Status
*#2454# Low Battery Power Off
*#0283# Receiver Packet loopback
*#0782# RTCTimeRead displays time (and seconds)
*#147852# Allows you to access many screens including CDMA DATA Connections
*#369852# Allows you to access many screens including CDMA DATA Connections
*#1472365# GPS Setup
*#232331# Bluetooth RF Test Mode
*#1575# Service menu
*#197328640# Service menu
*#2767*2878# Service menu
*#32489# Service menu
*#4238378# Service menu
*#6984125*# Service menu
*#7284# Service menu
*#9090# Service menu
*#2580# Service menu
*#2664# Touchscreen Firmware Version
*#2664# Main Firmware Update
*#3264# RAM Version
*#3282*727336*# Current Data State
*#745# Sec_RIL_Dump allows you to copy to phone memory, clear ril log, (greyed out copy to SDcard and view RIL log), exit
*#7450# Phone Dump Mode Disable
*#7451# Phone Dump Mode Enable
*#7780# Factory Reset
*#9900# SysDump copy logcat/dumpstate/dumpsys, enable debug log, copy watchdogdumpstatelog)

*#0*# – Test Utility – SAFE TO PLAY WITH
*#0289# Melody Test again?
*#0673# Melody Test SAFE TO PLAY WITH
*#0842# Vibration test SAFE TO PLAY WITH
*#2263# ??
*#2663# Touchscreen Accuracy Test SAFE TO PLAY WITH

*#767*3855# Factory Format – CRAP!! WARNING!!!