1. Press Menu Softkey.
2. Go to Settings—Advanced UI, input password to enter.
3. Select Reset to Factory option. The LCD screen will prompt with: ”Warning, Reset to Factory Setting”. Press OK to continue.
Or long press the “OK” button about 5s in idle status.
Long press the “Redial” button about 5 s in idle status.
For information on how to operate your Yealink Device not referenced here, please refer to the user guide.