Now if you’re in an area with a bad connection, you can make calls using Wi-Fi. AT&T has made this feature available to eligible customers who are also running iOS 9. MacRumors reports that many people have successfully activated Wi-Fi calling.

This feature isn’t groundbreaking (Apple’s FaceTime Audio functions in the same way) but it is a good option to have.

If you’re an AT&T customer you can activate Wi-Fi calling in the Phone section of the iPhone Settings app by simply toggling on Wi-Fi calling. After that, you’ll go through a few steps to set it up and to include entering an emergency address. To use this feature, you must be running iOS 9 on an iPhone 6 or newer.

Additionally, you must enable AT&T HD voice features and be connected to the Internet to use Wi-Fi calling. It’s free to use within the U.S., Puerto Rico, and the Virgin Islands. Outside of that, standard long distance rates will apply. After going through the setup, there’s a short activation period and then you’ll be ready to make calls.

This feature was originally supposed to launch at the same time as iOS 9 but was delayed as AT&T was waiting on a waiver from the FCC. The waiver, which they received Tuesday, allows AT&T to temporarily not offer support options for deaf and hard-of-hearing customers.