Deregistering the handset
Open the 'De-register' option in the 'H/Set Settings' menu
Enter the system PIN with the number keys and confirm with MENU.
Select the handset to be deregistered.
Press MENU to deregister the handset.
Resetting a handset
This function resets all of the individually performed settings on the
handset back to the factory settings.
Open the 'Handset reset' [Reset the handset] option in the 'H/Set
Settings' menu.
Confirm the security question with MENU.
You will find the factory settings of the handset at Factory settings on the
handset.
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