[Continuum Android Development] colbyman:
Here are a bunch of others "secret menu" items, for those who care.

Go into the Dialer and enter *#83786633 then press the Home key

Go back into the phone dialer and enter *#22745927

Now a box will come up asking for the SPC code. Enter 000000

Press the Hidden menu Enable radio button.

Now you can use these codes.

The dialing code string you have to use is *##

Here are some things you can gain access to

Audio Tuning

*#28346#

Several audio tuning menus.

I've only tested the two items below:

To silence boot and shutdown audio go to Situation/BOOTSOUND and turn the values to 0. I've tested and confirmed this works.

To silence the volume key audio when turning the volume up/down go to Situation/VOLUMEKEY and turn the values to 0. I've tested and confirmed this works.

Full Bat Popup

*#3844228#

This allows you to disable the full battery pop-up.

I have tested this and it works successfully.

HwCodec

*#0002*28346#

Audio path volume controls. Most importantly, it looks like there's a sidetone adjustment.

I have not tested any of these items yet.

Shutdown

*#7594#

This enables you to shut your phone off by long-pressing the power/lock key.

No more pop-up confirmation.

I have tested this and it works successfully.

I also need to point out that this disables your slide lock screen.

Diag/Testing Mode

*#4636*1111#

GPSSetup menu

*#1472365#

The settings are set to the "fixed" values by default.

You can go into Command and then start GPS and force a satellite lock.

There's other cool info there too.

*#7594#

If your enable this, it appears to not only shutdown your phone with a long press of the power key, but it also disables your lock screen (puzzle/glass screen).

*#1472365# - GpsSetup

Very useful tests for the GPS!!!

Setup/Position Mode/ Operation Mode: (Standalone/MSAssisted/MSBased) Starting Mode: (Cold Start/Warm Start/Hot Start) Session Type: (Single Fix/Navigation) Setup/Command allows you to test the GPS and look at the results

*#INFO*1111# - Testing

Phone information/Battery information/Battery history/Usage statistics

Very useful diagnostics

*#0*# - LCD TEST

red/green/blue/melody/vibration/dimming/megacam/Sensor/touch/sleepmode/LED/RECEIVER

Very useful tests for the LCD

##RTN# - Real-Time Network (RTN)

Lots of useful information, like the Life timer / calls and Life Byte usage stats

*#DATA*727336*# - DataCreate

Call log/System Space/User Space/Phone Book/Schedule/Message/Ring tone/Screen/IMEI/ESN/Error log

Very useful information!!!

*#0228# - BatteryStatus

Very useful real-time battery statistics!

##UPST# - PhoneUtil - UART/USB

Universal Asychronous Receiver/Transmitter / Universal Serial Bus

Most likely controls how you connect technician testing equipment to test out the UART/USB subsystems

##DATA# - Data Programming - (Verizon customers: whenever prompted for SPC enter 000000)

User Name/Advanced/Restore/Enable HFA/DSA Server/MMSC/URL/Multimedia/WorkMode/WiMAX

##DEBUG# - Debug Menu - (Verizon customers: whenever prompted for SPC enter 000000)

Debug Screen/Test Calls/RC Data/HDR/1X Selection/Voice Privacy/DTMF Set/Korea Mode Set

##AKEY# - Data A key menu - (Verizon customers: whenever prompted for SPC enter 000000)

##<MSL># - (Verizon customers: whenever prompted for SPC enter 000000)

Program your Mobile Device Number(MDN) and Mobile Station ID(MSID)

##GPSCLRX# - Reset the GPS - (Verizon customers: whenever prompted for SPC enter 000000)

##SCRTN# - Changes DSA back to Factory - (Verizon customers: whenever prompted for SPC enter 000000)

##TTY# - TTY TestMode

*#0842# - Device Test - Vibration Test

*#0673# - MelodyTest

*#7780# - Factory data reset

*#232331# - BluetoothTest

*#2664# - Touchscreen Accuracy Test

Nice if you want to see how accurate your touchscreen is

*#0283# - ServiceMode - PACKET LOOPBACK

Need to hit home to get out - I couldn't get this to do anything but it could be the data packet that you sent coming back to you on the loopback device

*#767*3855# - Factory Format - WARNING!!!

Will go to Hands Free Activation

Nice if you'd like to reactivate your phone, it will do so automatically

*#197328640# - ServiceMode - Menu key to bring up menu - WARNING!!!

Will turn off your radio - Not sure what this does

*#0011# - ServiceMode - Force Closes - Menu key to bring up menu

Will turn on your radio, and then reboot

*#32489# - ServiceMode - Force Closes - Menu key to bring up menu

Doesn't seem to affect the radio

*#2580# - ServiceMode - Not sure what this does

*#0782# - RTCTimeRead - Displays Date and Time

*#745# - Sec_RIL_Dump - Has the LogFileList

Copy to phone memory/Copy to SD card(grayed out)/View Ril Log(grayed out)/Clear Ril Log/Exit

Probably dumps the logs for the Radio Interface Layer (RIL) between the Operating System and the phone's radio and modem

I haven't tested a dump yet

*#9900# - SysDump

copy logcat/dumpstate/dumpsys/enable debug log/copy/watchdogdumpstatelog

Probably dumps the logs for the Operating System kernel

I haven't tested a dump yet