Lumia 810 WIFI calling vs Lumia 521

Will Lumia 810 have Wifi calling?

Ok, so the Lumia 521 will have wifi calling out of the box when you buy it from T-Mobile, and they are going to push an update out to the 521s that are bought through third party sellers.  Does this mean that wifi calling will be live for Lumia 810 owners then too?

T-Mobile said an over-the-air update will start rolling out May 20 to enable Wi-Fi Calling.)