diff --git a/biz/filters.py b/biz/filters.py
index 848d376..5714c53 100644
--- a/biz/filters.py
+++ b/biz/filters.py
@@ -147,6 +147,7 @@ class PhoneFilter(admin.SimpleListFilter):
     def lookups(self, request, model_admin):
         return (
             ('exclude_mobile', 'Exclude mobile (06/07)'),
+            ('mobile_only', 'Mobile only (06/07)'),
         )
 
     def queryset(self, request, queryset):
@@ -154,4 +155,9 @@ class PhoneFilter(admin.SimpleListFilter):
             return queryset.exclude(
                 Q(phone__startswith='06') | Q(phone__startswith='07')
             )
+        elif self.value() == 'mobile_only':
+            return queryset.filter(
+                Q(phone__startswith='06') | Q(phone__startswith='07')
+            )
+
         return queryset