I was at an AT&T store yesterday & the rep said that it will be rolling out to more phones but couldn't confirm which phones would actually get the feature.
Thanks for posting this. I was considering using my unlock code on my phone to try with Cricket or T mobile and I dropped T Mobile years ago for Dropped Calls. So not sure I trust them in my area. Like ATT coverage here, so this would be a big Plus! (That's not a reference to the dreaded Fruit phone! lol)