Yealink SIP-T38G - Manual (Page 37)

Customizing Your Phone
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WWW DD MMM Tues 17 Jul
You can also configure the time and date settings via web user interface at the path
Phone->Preference.
You can change the administrator password to protect your phone from unauthorized
use. Only the users owning the administrator password have the permission to change
the advanced settings.
To change the administrator password via phone user interface:
1. Press Menu->Setting->Advanced Settings (password: admin) ->Set Password.
2. Enter the old password in the Current PWD field.
3. Enter the new password in the New PWD field.
4. Enter the new password again in the Confirm PWD field.
5. Press the Save soft key to accept the change or the Back soft key to cancel.