Pasted from admin guide, below info.
You can restrict the menus and options that phone users see when they use the
phone interface. The Phone-UI-user-mode parameter can be enabled in a
provisioning file or in the configuration utility. Specific parameters are then
designated as “na” or “ro.” Parameters designated as “na” will not appear on the
user’s phone interface. Parameters designated as “ro” will not be editable by the
user.
You can set the Phone-UI-user-mode parameter in the configuration utility, but you
then need to designate individual parameters as “na” or “ro” using provisioning
files. For more information on provisioning, see the Cisco Small Business IP
Telephony Devices Provisioning Guide on cisco.com.
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You've printed out the xml file, for the fields that you want to hide, you'll need to change the designation to "na", so those fields aren't seen when the Phone UI user mode is set to yes. Then have the phone download the changes in your xml file.
