Factory Resetting
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.
Note:
Long press the “Redial” button about 5 s in idle status.
User Guide
For information on how to operate your Yealink Device not referenced here, please refer to the user guide.
T53
https://support.yealink.com/en/portal/docDetail?documentCode=b8539d8fb9814dab
T53W/T54/T57W
https://support.yealink.com/en/portal/docDetail?documentCode=89dc2873d4b38917
T58A
https://support.yealink.com/en/portal/docDetail?documentCode=a7573557d4b51330