Verizon carrier update brings IPv6, preparation for VoIP in bundle

[planktons]

Was just looking at the carrier bundle that was pushed with iOS 6.1. It enabled IPv6 over LTE and going over the carrier.ims file you can find this (changed identifying strings to 1234):

  <!-- VoIP parameters -->
  <app_field id="USERNAME"     type="string" value="sip:1234@vzims.com" />
  <app_field id="PASSWORD"     type="string" value="1234" />
  <app_field id="DOMAIN"       type="string" value="vzims.com" />
  <app_field id="PRIVATE_URI"  type="string" value="sip:1234@ims.vz.ne" />
  <app_field id="DISPLAY_NAME" type="string" value="qctlabsip1234 user" />
  <app_field id="REGISTRATION_MODE" type="int32" value="2" />
  <app_field id="VOIP_CONFIG_DOMAIN_NOTF_ENABLED" type="int32" value="1" />
  <app_field id="VOIP_CONFIG_VDN" type="string" value="0000001234" />
  <app_field id="SMS_CONFIG_SMS_FORMAT" type="int32" value="0" />

And in carrier.pri you find this:

<dict>
		<key>IMS Feature Enable</key>
		<true/>
		<key>VOIP Registration Mode</key>
		<string>0</string>
		<key>SMS MO On Traffic Channel</key>
		<true/>
		<key>VOIP Preferred URI</key>
		<string>1</string>
	</dict>

Makes you wonder what happens if you enable registration mode...

Have you found anything else worth mentioning?