HTC secret Code

*#*#3424#*#* – Run HTC function test program
*#*#4636#*#* – Show HTC info menu
*#*#8255#*#* – Launch Google Talk service monitor
##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

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!!!

ANDROID secret codes

*#06# – IMEI number

*#*#273282*255*663282*#*#* – Immediate backup of all media files

*#*#4636#*#*

This code can be used to get some interesting information about your phone and battery. It shows following 4 menus on screen:

* Phone information
* Battery information
* Battery history
* Usage statistics

*#*#7780#*#*

This code can be used for a factory data reset. It'll remove following things:

* Google account settings stored in your phone
* System and application data and settings
* Downloaded applications
It'll NOT remove:

* Current system software and bundled applications
* SD card files e.g. photos, music files, etc.
PS: Once you give this code, you get a prompt screen asking you to click on "Reset phone" button. So you get a chance to cancel your operation.

*2767*3855# - Think before you give this code. This code is used for factory format. It'll remove all files and settings including the internal memory storage. It'll also reinstall the phone firmware.

PS: Once you give this code, there is no way to cancel the operation unless you remove the battery from the phone. So think twice before giving this code. 

*#*#34971539#*#* - This code is used to get information about phone camera. It shows following 4 menus:
* Update camera firmware in image (Don't try this option)
* Update camera firmware in SD card
* Get camera firmware version
* Get firmware update count

WARNING: Never use the first option otherwise your phone camera will stop working and you'll need to take your phone to service center to reinstall camera firmware.

*#*#7594#*#*

This one is favorite one. This code can be used to change the "End Call / Power" button action in your phone. Be default, if you long press the button, it shows a screen asking you to select any option from Silent mode, Airplane mode and Power off.

You can change this action using this code. You can enable direct power off on this button so you don't need to waste your time in selecting the option.

*#*#225#*#* - Events calendar.

*#*#426#*#* - Debug information for Google Play service.

*#*#759#*#* - Access Google Partner setup (Rlz debug interface).

*#872564# - USB logging control

*#9900# - System dump mode

*#*#97#*#* - Language and Keyboard settings

*#*#46*#*# - Reset Sim

*#301279# - HSDPAHSDPA means “High Speed Downlink Packet Access” and is a technique used in the UMTS mobile communication system, the download speeds of currently 3.6 Mbit/s to 7.2 Mbit/s. HSUPA is developed commercially since 2007 in Germany. High Speed Downlink Packet Access (HSDPA, 3.5G, 3G + or UMTS broadband) is a data transmission method of the cellular standards UMTS, which was defined by the 3rd Generation Partnership Project. The method enables DSL-like data rates in mobile networks. HSDPA is available in Germany, among others by the network operators Vodafone, E-Plus, O2, and telecom and in Switzerland by Swisscom, Sunrise and Orange. In Austria operate the A1, T-Mobile, Orange and Three HSDPA networks./HSUPAHSUPA means “High Speed Uplink Packet Access” and is a technique used in the UMTS mobile communication system, the upload speeds up to 5.8 Mbit/s. High Speed Uplink Packet Access (HSUPA) is a transmission method of the UMTS mobile radio standard that allows higher data rates in the uplink and reduces the round trip time (often referred to as ping). HSUPA Category 6 were up to 5.76 Mbit / s and category 9 (Release 9) up to 23 Mbit / s can be achieved. HSUPA is part of Release 9 of UMTS. Control Menu

*#7465625# - View phone lock status

*#*#273283*255*663282*#*#* - This code opens a File copy screen where you can backup your media files e.g. Images, Sound, Video and Voice memo.

*#*#197328640#*#* - This code can be used to enter into Service mode. You can run various tests and change settings in the service mode.

WLAN, GPS and Bluetooth Test Codes:

*#*#232339#*#* OR *#*#526#*#* OR *#*#528#*#* - WLAN test (Use "Menu" button to start various tests)

*#*#232338#*#* - Shows WiFi MAC address MAC (Media Access Control), address is a globally unique identifier assigned to network devices, and therefore it is often referred to as hardware or physical address. MAC addresses are 6-byte (48-bits) in length, and are written in MM:MM:MM:SS:SS:SS format. The first 3-bytes are ID number of the manufacturer, which is assigned by an Internet standards body. The second 3-bytes are serial number assigned by the manufacturer.

*#*#1472365#*#* - GPSThe Global Positioning System (GPS) is a space-based navigation system that provides location and time information in all weather conditions, anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. test

*#*#1575#*#* - For a more advanced GPS test

*#*#232331#*#* - Bluetooth test

*#*#232337#*# - Shows Bluetooth device address

*#*#8255#*#* - This code can be used to launch GTalk Service Monitor. Gtalk Service Monitor and play services monitor are developer options to let you examine and debug the push connections to google talk and google play services. Below these, the "restore default heartbeats" button lets you bring back the original heartbeat exchange settings if you have to. The final button is about making a donation to the developer of this convenient app. and that is it! now, you are left to experiment with the data and wi-fi settings until you land the most comfortable intervals for you.

*#*#36245#*#* - Access email debug information.

Codes to get Firmware version information:

*#*#4986*2650468#*#* - PDA, Phone, H/W, RFCallDate

*#*#1234#*#* OR *#1234# - PDA and Phone firmware information

*#*#1111#*#* - FTA SW Version (1234 in the same code will give PDA and firmware version)

*#12580*369# – Software and hardware info

*#9090# – Diagnostic configuration

*#*#2222#*#* - FTA HW Version

*#*#44336#*#* - PDA, Phone, CSCThe Customer Service Code (CSC) plays an important role in the operation of your Samsung mobile device. Different countries have different standards for both voice and data communications to a cell phone tower. Although most countries follow the international standard for WiFi connects, there are variations from the standard. The CSC code ensures that your mobile device complies with the standards for your country, and your cell phone operator. The CSC code also determines the source for firmware updates via FOTA or Samsung Kies., Build Time, Changelist number

Codes to launch various Factory Tests:

*#*#0283#*#* - Packet Loopback

*#*#0*#*#* - LCD display 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 
GSM codes

Type the code and press send button.

Barring code: 0000

Check barring

Outgoing: *#33#

Incoming: *#35#

Cancel all: #330*BC# (BC=barring code)

Set out: *33*BC#

Cancel out: #33*BC#

Set in: *35*BC#

Cancel in: #35*BC#

Set out msg: *33*BC*16#

Cancel out msg: #33*BC#

Set in msg: *35*BC*16#

Cancel in msg: #35*BC#

Divert calls (N=number)

set all: **21*N#

check all: *#21#

Cancel all: ##21#

Smart menu 
GP: *111#

Robi: *140#

Banglalink: *789#

Waiting 
Set: *43#

Cancel:#43#

Check:*#43#

Restore PIN by PUK: 

**04*PUK*PIN*PIN#

Restore PIN2 by PUK2:

**042*PUK2*PIN2*PIN2#

International Mobile Equipment Identity (IMEI):*#06#

Type code and press the green key! 

Caller's ID: *#30#

My caller ID: *#31#

Answering number: *#76#

My ID on ans: *#77#

Type*#61# and press call - Check redirection status.

Cancel all redirections:##002# ;

*43# to activate call waiting, to deactivate#43#.

If your phone doesn't have incoming call barringand outgoing call barring, You can try this.

For outgoing call barring dial *33*barcode*# and pres OK.

To deactivate it dial #33#barcode*#.

On any phone on any network type in **43# to enable conference calls. You can make up to7 calls at once .

If you need to block SMS reception (if you are spammed by someone) just press this code: *35*xxxx*16#

xxxx is your Call Barring code (default is 0000).

To remove this barring type: #35*xxxx# .

If you want to hide/show your phone number when calling, putone of these codes below in front of the number that you are going to call. (*#30# / *#31# or*31# / #31# ) Works onsome networks.

Typing *0# or *nm# on the beginning of a txt message gives you detailed delivery report on some networks.. But turn off reports in message settings before.

When the sim card-pin blocked type **042*pin2 old*newpin2*newpin2* .

To hide Your number while texting (only 02 network n Nokia phone) go 2 the messages menu select create e-mail, it will ask for an e-mail adress, enter t@t, enter a subject, write the msg than send. It will ask e-mail server number, enter the number of your friend and send!
When roaming, type*#111*# or *#111# to call home abroad. 

http://mobilespecs.net/phone/codes/HTC/HTC_M7_32GB.html