OEM unlock and ClockWorkMod Recovery install for Samsung Nexus S(i9023 and i9020A)


  • Installed Android SDK
  • Download and extract recovery clockwork, placed the img file inside android-sdk-windows/tools and rename it become recovery.img

Install Samsung Nexus S driver

Unlock OEM Samsung Nexus S

  1. Turn off Nexus S
  2. Connect to PC/Laptop via USB cable
  3. Press and hold Power + Volume[+] buttons until the bootloader interface loaded.
  4. At Nexus S Screen, you`ll see LOCK STATE – LOCKED
  5. At windows Open command prompt or start > run, type: cmd
  6. Change work path and unlock oem

    cd c:\android-sdk-windows\tools
    fastboot oem unlock

  7. In Nexus S, you`ll see confirmation to unlock
  8. Select YES, make sure you already backup all your data, this step will wipe all your data
  9. Wait for complete confirmation come up
  10. A confirmation ‘LOCK STATE – UNLOCKED’ will show on screen, go to next steps

Install ClockWorkMod Recovery

  1. back to command prompt to install CWM Recovery, type

    fastboot flash recovery recovery.img

  2. Wait for cwm installation successed report
  3. Reboot
  4. Done

Do With Your Own Risk

Download Support Files

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