How to Factory Reset Yealink Desk Phones

1. Standard Phone Interface Reset

Default credentials (if not changed by provider):

• Username: admin
• Password: admin

1. Press and hold the OK button for 5-10 seconds
2. When you see the confirmation message, press OK
3. Enter the administrator credentials when prompted
4. The phone will reset to factory settings

2. Newer Models Interface Reset

For T33G, T42S, T46S, T48S, T43U, T46U, T48U, T53, T53W, T54W, T40P, T58W, VP59:

1. Long-press the OK button for 5 seconds
2. Enter administrator credentials when prompted
3. Press the Yes softkey to confirm factory reset

Note: For T57W models only - Long-press the Redial button for 5 seconds instead of OK

3. Local Configuration File Method

This method requires admin access to the phone:

1. Create a configuration file (e.g., reset.cfg) containing:

   static.security.user_password = admin:admin

   or

   static.security.user_password = user:user

2. Host this file on a local web server
3. On the phone:
   • Long press a Line Key
   • Choose Type as "Key Event"
   • Set Key Type as "Zero Touch"
   • Set Label as "password"
4. Press the configured line key
5. Navigate through Network Auto Provision
6. Enter the URL to your configuration file
7. Go to Menu → Basic → Update Configuration