Wi-Fi calling now available on AT&T iPhones - Six Colors
sixcolors.com/post/2015/10/wi-fi-calling-now-available-on-att-iphones
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
October 8, 2015 11:56 AM PT The good news is that AT&T and the FCC seem to have finally finished whatever spat discussions they’ve been having, and iPhone users on the carrier can now…