Samsung D720 (Nexus S 4G)
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Programming Instructions
  1. Power on the phone
  2. Enter *#*#000000#*#*
  3. Select edit mode and enter 000000
  4. Type in your 10 digit MDN number and hit enter
  5. Type in your 10 digit MIN number
  6. Now just keep hitting enter until the phone exits the programming menu and reboots on its own
Diagnostic Mode
  1. Go to Menu, Settings, Applications, Development and check "USB Debugging"
  2. Bring up the dial pad and enter *#*#8778#*#*
  3. You should have 2 different options on the screen
  4. Select MODEM for both options
  5. Phone is now on diag mode
Additional Troubleshooting
  1. Make sure phone is in diag mode. (if applicable)
  2. Ensure port on phone is clean, brush out if necessary.
  3. Check for proper cable and snug connection to phone port.
  4. Unplug computer side of USB cable, wait 3 seconds and plug into different usb port.
  5. Reinstall drivers for your mobile device. Use Device Manager to ensure you dont have any driver conflicts and the phone is showing up properly.
If you are in the United States of America and own a phone that was purchased before January 26th, 2013, you may legally unlock or flash your device in accordance with exemptions in the Digital Millennium Copyright Act. Cellphone unlocking and flashing will now be no longer be exempted from the regulations specified within the Digital Millennium Copyright Act for cellphones that were purchased after January 26, 2013, unless you have permission from the service provider your phones was originally locked to or purchased from.

We will not be able provide any advice, service, or support for an USA service provider's cellular phones or smartphones that were purchased on January 26, 2013 or thereafter.

By using our software, information, support, or intellectual property you agree not to hold CyberFlashing, LLC liable or responsible for any consequences that may result from unlocking or flashing phones that were purchased after January 26th, 2013. You accept full responsibility for complying with all local, national and international laws.

CyberFlashing, LLC will not knowingly give any advice or provide any service to anyone who wishes to unlock or flash a phone that was purchased from any USA service provider on or after January 26, 2013 without carrier permission.

For more information click here for the Digital Millennium Copyright Act.