How often does 2 degrees update the listw of compatible wifi calling phones on their web site?

I have often thought a WiFi calling phone would be useful in our household which seems to get patchy interior reception, but we are with 2 degrees and like their service to date. Their list of WiFi calling phones looks somewhat static, and one of their pages says 'updating soon in 2018'.

So I guess I'm wondering how often they get around to updating their FAQ and supported Andriod phones. It looks a bit out of date.