TIP: You can change the master user code, but you cannot delete it.
- At the Home screen, tap Security.

 - At the Security screen, tap Menu.

 - Select Toolbox.

 - Enter the 4-digit master code.

 - On the Toolbox (1 of 3) screen, tap User Management.

 - The Users Management screen displays 3 users at a time. Use the ↓ and ↑ arrows to scroll through the list.

 - Tap the user you want to delete.
 - Tap Delete User.

 - Press OK.

 - Press the Back button 3 times to return to the Security screen.

 
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