List Of Android Secret Codes
*#06# To check IMEI of your device, enter this code.
*#0*# To enter service menu on the very new Android phones.
*#0228# To check battery status.
*#9090# / *#1111# To make device in Service mode.
*#*#4636#*#* To get information about battery, usage statistics and device.
*#*#34971539#*#* To get all information about camera.
*#12580*369# To get software and hardware info.
*#228# For ADC Reading.
#7353# To hide test menu 2/Self Test Mode.
##7764726 To hide service menu for Motorola Droid.
*#*#273283*255*663282*#*#* For backup of our all media files.
*#*#232338#*#* It display the Wi-Fi mac address.
*#7465625# To view status of lock-phone.
*#*#3264#*#* To show RAM version.
*#*#44336#*#* To display build time and change list number.
*#*#232337#*# To see or display device’s Bluetooth address.
*#*#197328640#*#* It enables test mode for service.
*#*#8351#*#* To enable voice dial mode.
*#*#8350#*#* To disable the voice dial mode.
*#*#0842#*#* To test Back-light/vibration.
*#*#2664#*#* To test the touch-screen.
*#*#0289#*#* For Audio test.
*#*#0*#*#* For LCD display test.
*#*#232331#*#* To test Bluetooth of any Android device.
*#*#0283#*#* To perform a packet loop-back test.
*#*#1575#*#* For advanced GPS test.
*#*#1472365#*#* To Perform a quick GPS test.
*#*#0588#*#* To perform a proximity sensor test.
*#*#7262626#*#* To perform field test.
*#*#232339#*#* Testing Wireless LAN.
*#9090# To Diagnose configuration of device.
*#872564# To control U-S-B logging.
*#9900# System dump mode.
*#*#7780#*#* Reset to factory state.
*2767*3855# To format Android device.
*#*#4986*2650468#*#* To get pda, phone, H/W and RF Call Date.
*#*#1234#*#* To know about pda and firmware version.
*#*#1111#*#* For FTA Software version.
*#*#2222#*#* For FTA Hardware version.
*#*#7594#*#* To change power button behaviour once code enabled.
*#*#8255#*#* To launch Google Talk service monitor.
All the above given android secret codes are tested and working fine. But some codes may not works few devices. You can just try find which work or which not. If you have any trouble, comment down below.