List Of Android Secret Codes

Android is one of the the most trusted mobile operating system for smart phones,tablets,TVs. One of the success mantra of android is it is open source, and therefore it can be customized by any developer. Easy customization is directly proportional to the number of apps, which means more number of satisfied customers. I have come up with the secret codes for android devices which are legit and useful in for various purposes but might not work for all.
Android Secret Codes :

For IMEI Number: *#06#
 For RAM Memory version: *#*#3264#*#*
 For FTA SW version: *#*#1111#*#*
For FTA HW version: *#*#2222#*#*
For Touchscreen version: *#*#2663#*#*
View Phone Lock Status: *#7465625#
Executes Emergency Dial Screen to unlock PUK Code: **05**#
Enables Voice Dialing Logging Mode: *#*#8351#*#*
Disables Voice Dialing Logging Mode: *#*#8350#*#*
Change behavior of Power button: *#*#7594#*#*
To test Vibration and Back-light of device: *#*#0842#*#*
To test Proximity/Distance Sensor: *#*#0588#*#*
To test Touchscreen: *#*#2663#*#*
For Audio Test: *#*#0289#*#* or *#*#0673#*#*
 To launch Service Mode: *#*#197328640#*#*
 Hidden Service Menu (Motorola Droid): ##7764726
Field Test: *#*#7262626#*#*
To format the phone: *2767*3855#
 To start GTalk Monitoring: *#*#8255#*#*
To get PDA, Phone, H/W and RF Call Date: *#*#4986*2650468#*#*
Displays Build Time and Change List number: *#*#44336#*#*
Packet Loopback Test: *#*#0283#*#*
LCD Display Test: *#*#0*#*#*
Enter Service Menu (on New Phones): *#0*#
Diagnostic Configuration: *#9090#
USB Logging Control: *#872564#
System Dump Mode: *#9900#
To test Bluetooth: *#*#232331#*#*
To display Bluetooth Physic Address: #*#232337#*#
To test secret GPS: *#*#1472365#*#*
 To test other GPS: *#*#1575#*#*
 To test WiFi/Wireless LAN of phone: *#*#232339#*#* or *#*#528#*#* or *#*#526#*#*
 To display Wi-Fi MAC Address: *#*#232338#*#*
 To Restore Factory Settings: *#*#7780#*#*
To create Immediate backup of your multimedia files: *#*#273282*255*663282*#*#*
To display Phone Information: *#*#4636#*#*
To get detailed Camera Information: *#*#34971539#*#*
For Software & Hardware Information: *#12580*369#
To display HSDPA/HSUPA Control Menu: *#301279#

Do tell us which set of codes work for you in the comments below and you can also suggest us some more codes if any.