Google Nexus S Secret Code

Secret Code for i9020/i9023/M200

• *#*#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 D720

• *#*#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