Download Google USB Drivers

Download Lenovo USB Drivers and Qualcomm Drivers

Download ADB Platform Tools (a.k.a. SDK Platform Tools)

Download QFIL tool (Not necessary unless bricked)

Install the necessary drivers shown above (→ 드라이버들 설치)

Download and extract the ADB Platform Tools (→ 다운로드 후 압축 해제)

Developer Mode (개발자 모드)

Enable Developer Mode by tapping on the device Build Number repeatedly Go to Developer Options → Enable USB Debugging and OEM Unlocking

→ 기기 정보에서 “빌드 번호”를 계속 눌러서 개발자 모드 설정 활성화 → 개발자 모드에서 USB Debugging 과 OEM Unlocking 설정 활성화

Recovery Mode (리커버리 모드)

Hold down Volume Up + Down when powering on to enter Recovery Mode

Go to the ADB platform tools folder, then Shift+RClick → Open Command Prompt or Powershell Use the following commands to check if ADB is working

fastboot devices -> check if device is connected to fastboot adb devices -> check if device is connected to adb

→ ADB platform tools 폴더로 가서, 쉬프트+우클릭 → Command Prompt 또는 Powershell 실행 → 위에 명령어로 ADB가 제대로 작동하는지 확인

Emergency Download Mode (Not necessary unless bricked) (벽돌 됐을 경우 긴급 복구)

adb reboot edl -> device will show into emergency download mode → Check if Qualcomm port is displayed in Device Manager or on QFIL tool