In a text message sent today to its eligible customers, AT&T announced that those who have activated the Wi-Fi Calling feature on their iPhone can now make and receive phone calls from and to the US at no charge when traveling internationally, assuming they have first updated to iOS 9.3 and installed the newly available carrier update.
This marks a small yet important change to how users can benefit from Wi-Fi Calling. Up until now, Wi-Fi calling for AT&T customers restricted them to using the service only from the U.S., Puerto Rico, or U.S. Virgin Islands. But now, it is opened to any country (except for a few exceptions), meaning an AT&T Wi-Fi Calling user can make calls to the US, or receive calls from the US anywhere in the world as long as there is a Wi-Fi connection.