Here are all the secret codes and hidden features which you don’t know. Only for Samsung Galaxy Nexus. Here are the codes which we update time by time, but before using any of the mentioned secret key you should double verify that what you are doing. You will be using this at your own risk.
Secret Code Galaxy Nexus GSM
*#*#786#*#* = RTO = Restore To Original
Hard Reset (Wipes/Resets Data/Profile & internal storage)
*#*#4772579#*#* = GPSCLRX
GPS clear (reset)
*#*#4636#*#* = INFO
Testing menu (Phone, Battery & Wifi Info, Usage Statistics)
*#*#8255#*#* = TALK
GTalk Monitoring (Monitor GTalk Activity)
*#06#
IMEI number
*#*#2432546#*#* = CHECKIN
Checkin (Manually check for System Updates)
Secret Code for Galaxy Nexus CDMA
*#*#3282#*#*
Data Programming (Data Profile, DDTM, Roaming Orig. Vocoder, EVRC-B, Home SID, USB Charging, RTSP/HTTPPD ports & addresses, Browser Gateway, MMSC URL)
*#*#33284#*#*
Debug Menu (1x/EVDO Engineering, , Data Status,Debug Screen, Test Calls, RC Data, HDR/1x Selection, Voice Privacy, DTMF Set, Korea Mode Set)
*#*#786#*#* = RTO = Restore To Original
Hard Reset (Wipes/Resets Data/Profile & internal storage!)
*#*#(your msl)#*#*
Service Menu (Phone Number Change)
*#*#8778#*#*
Phone Utility (UART/USB Modem & PDA Selection)
*#*#4772579#*#* = GPSCLRX
GPS clear (reset)
*#*#4636#*#* = INFO
Testing menu (Phone, Battery & Wifi Info, Usage Statistics)
*#*#8255#*#* = TALK
GTalk Monitoring (Monitor GTalk Activity)
*#06#
MEID number (Display your MEID/IMEI)
*228
Phone activation (Activate your phone)
*#*#2432546#*#* = CHECKIN
Checkin (Manually check for System Updates)
*#*#72786#*#* = SCRTN
Factory default value for DSA selection