I have seen both of the following methods of switch interface configuration for supporting IP Phones.
switchport access vlan <data-vlan>
switchport voice vlan <voice-vlan>
switchport mode access
and
switchport trunk native vlan <data-vlan>
switchport trunk allowed vlan <data-vlan>,<voice-vlan>
switchport mode trunk
Can anyone provide a good pro or con of standardizing on either method or does it just come down to a matter of personal preference which one you should choose to implement?