When iOS 9 beta 5 launched last week, one of the more welcome additions was Wi-Fi calling support for AT&T. The only problem, however, was that the carrier didn’t actually flip the switch to make this feature work; it was just staring people in the face, waiting to be used.

Today, however, a number of users are reporting that Wi-Fi calling support for AT&T is working, though only in a handful of markets. It’s unclear how comprehensive the support will be in the early going; a disclaimer during setup warns that this is just a trial run. It’s likely support will be more widely available this fall when the final version of iOS 9 launches.

If you want to give the feature a quick test run, flip on the Wi-Fi calling option, and agree to the terms. Once you do this, you’ll know pretty quick whether or not it’s available in your market. If it is, you’ll be able to make calls over Wi-Fi where AT&T coverage isn’t quite up to snuff.

Not working for you? Well, you’ll have to wait patiently until AT&T decides to roll it out to the market you’re in. Check out the video below to see what else is new in iOS 9 beta 5.