The phone settings XML tag (<phone-settings>) contains the main part of the available configuration parameters.
This XML tag can be used either inside the <settings> tag
or as an individual XML file whose URL is listed inside <setting-files> tag
action representing the action on the setting, currently only supported value is "remove"
"remove" will remove only the value from the setting. Note that this setting only applies to a small list of settings.
The action attribute was added in 10.1.57.0, it can only be applied to the below listed settings and if used on any other settings will simply result in a normal "set" of the included value overwriting any previous value available to following settings: