Want international Wi-Fi calling on your AT&T iPhone? Update to iOS 9.3.
"With the latest software update for your phone you can use Wi-Fi Calling when traveling outside the U.S.," reads an AT&T text message sent to those who upgraded to Apple's latest mobile operating system, as reported by AppleInsider. "This means you can call back to the U.S. or receive incoming calls, with no airtime charges."
When calling international numbers, however, rates from your calling plan or international long distance package still apply.
AT&T rolled out Wi-Fi calling in October, which can assist customers in areas with strong Wi-Fi but spotty cellular service, like basements and elevators. It is currently available on the iPhone 6 lineup. Users will also need a wireless account set up for AT&T HD Voice and, of course, a Wi-Fi connection.
To get started, visit your iPhone's Settings menu and enable Wi-Fi calling. You'll be prompted to enter an address where you are most likely to use the function—a home or office, probably. This information can help first responders find you in the event of a 911 call when your location data is unavailable.
Once set up, the handset automatically uses Wi-Fi Calling in places with spotty or nonexistent cell service but a strong wireless signal. Plus, it works with your current phone number and does not require an additional app download.
Apple officially enabled Wi-Fi calling in iOS 8, but it required carrier support to work. Verizon added it in December for Samsung's Galaxy S6 and Galaxy S6 Edge devices, with the promise of more Android and iOS support this year.
For more, see PCMag's full review of iOS 9.3.