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How To Unlock Samsung SC-03D Docomo Galaxy S2 LTE

To start unlocking Samsung SC-03D Docomo Galaxy S2 LTE, please read every step carefully and your Samsung device will be unlocked in minutes.

These are instructions with fewer details. If you prefer instructions with pictures, please skip this guide and download the PDF version here:

  1. Shut down your PC’s firewall and antivirus. Connect to the Internet with a standard high speed connection and not a wireless modem, a VPN, or a Proxy. Unlock at home and not at a company.

  2. Download the unlock software and install all items.

  3. If you have the software Samsung Kies or PC Studio installed, uninstall it from your PC. If you have the software Microsoft Active Sync installed, uninstall it from your PC as well. Reboot computer.

  4. Insert original Docomo SIM into phone or do not insert any SIM card at all. It is preferred to use a Docomo SIM though. Do NOT connect the phone to the computer yet. Make sure that the battery is fully charged!

  5. On your phone, make sure Bluetooth is turned off. Increase screen time out to the maximum if available.

  6. On your phone, turn on USB Debugging: Settings > Applications > Development > USB debugging and checkmark the box. On some phones, the path may be Settings > Programs > Development > USB debugging or Settings > Developer options > USB debugging.

  7. Enter *#7284# and select Qualcomm USB settings in the PhoneUtil menu.

  8. Select DM+Modem+ADB and press OK.

  9. Enter *#9090#. In the ServiceMode menu select the first option: USB.

  10. Turn phone off. Insert non-Docomo SIM card and turn phone back on. Connect phone to PC. Select Kies Mode in case the phone gives you the option to do that.

  11. Launch GalaxyUnlocker software on your PC. Enter your username and password and connect (if you don’t have one, buy it here).

  12. Press the Rescan button. On the right side of the unlock program, make sure that "QCOM Diag" is detected. If not or if the unlock software gives you the error that ports have not been set correctly, download the PDF guide above and go to step 13 at the end of the document to see how to set ports correctly.

  13. Click Direct Unlock. GalaxyUnlocker will now unlock the phone.

  14. Your Samsung SC-03D Docomo Galaxy S2 LTE is now unlocked.


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