You can use a campaign filter template to specify the filter and sort conditions for the contacts in the contact list associated with a campaign. POM filters the contacts in the contact list based on the filter conditions and then sorts the filtered contacts based on the sort conditions configured in the filter template. POM uses these filtered and sorted contacts for the associated campaigns. POM also provides an option to make phone attributes of a filter template unavailable for sorting. However, existing filter templates with phone attribute continue to work without any impact.