AT&T begins enabling Wi-Fi Calling for some subscribers
AT&T began turning on Wi-Fi Calling for a portion of subscribers on Thursday, just days after receiving a waiver from the Federal Communications Commission, AppleInsider has learned.

One reader helped confirm that the option is in effect in places like Taylorsville, Utah. AppleInsider found, however, that even customers in New York City may not be able to turn the feature on, even if the carrier has switched from telling people that the option isn't available to saying it can't be turned on for a particular account.
To check whether Wi-Fi Calling is available, iPhone users should go into the iOS 9 Settings app, select Phone, and try toggling it on. Several steps are required if service is available, including entering an emergency address, and it may take a few minutes for the feature to become functional.
Last year, AT&T promised to activate Wi-Fi Calling sometime in 2015, but as recently as a week ago said it couldn't because it didn't have a waiver to temporarily ignore full TTY options for the deaf and hard-of-hearing. The FCC issued the waiver on Tuesday.
Two of the carrier's rivals, T-Mobile and Sprint, have been offering Wi-Fi Calling for some time. This has generated vocal complaints from AT&T, accusing the FCC of unfair enforcement.

One reader helped confirm that the option is in effect in places like Taylorsville, Utah. AppleInsider found, however, that even customers in New York City may not be able to turn the feature on, even if the carrier has switched from telling people that the option isn't available to saying it can't be turned on for a particular account.
To check whether Wi-Fi Calling is available, iPhone users should go into the iOS 9 Settings app, select Phone, and try toggling it on. Several steps are required if service is available, including entering an emergency address, and it may take a few minutes for the feature to become functional.
Last year, AT&T promised to activate Wi-Fi Calling sometime in 2015, but as recently as a week ago said it couldn't because it didn't have a waiver to temporarily ignore full TTY options for the deaf and hard-of-hearing. The FCC issued the waiver on Tuesday.
Two of the carrier's rivals, T-Mobile and Sprint, have been offering Wi-Fi Calling for some time. This has generated vocal complaints from AT&T, accusing the FCC of unfair enforcement.
Comments
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Wow, had no idea this was available but I just went through the activation steps and my iPhone is now using wifi calling. Carrier is AT&T and location is in central Texas.
I've been using it on AT&T with the iOS 9 public beta since 9.0 beta 3 here in the Minneapolis/St. Paul area. Of course it finally started working reliably when I went to the 9.1 beta.
It is enabled in Memphis, TN - well at least on my account!
Does anyone know if it sounds clearer?
Also what happens to the call as you enter in and out of wifi?
If it just drops calls I'm not going to see this very useful on the road as when you drive around and hit wifi spots it may cause frustrations.
Sure you can turn off wifi from control center but then that effects apple maps a little.
Working in Northeast Texas between Dallas and Shreveport.
Just turned it on and working fine for me in NYC. In my apartment where I only have two bars calling over wifi will hopefully be an improvement. Made a couple of calls and so far the quality seems very good.
Activated in Pittsburgh. I hope this works better than the microcell I've been using. It was great when it worked, but getting it to work was pure luck.