The benefits of Wi-Fi Calling: It’s included at no additional charge with your existing voice plan and HD voice-compatible device.
You make and receive calls with Wi-Fi using your phone number.
Wi-Fi calls to US numbers are free, even while traveling internationally.
Is WiFi calling free outside US?
AT&T launched Wi-Fi Calling, allowing users to call US numbers from abroad over Wi-Fi instead of a cellular network. Provided you’re connected to Wi-Fi, the calls will be free of charge. The service only works for iPhones 6 or newer running with iOS 9.3. Wi-Fi Calling only works when you call US numbers.
Can I use Verizon WiFi calling overseas?
You can make and receive calls over Wi-Fi even if you’re outside the Verizon network coverage area. Wi-Fi calls always originate in the US, even when you’re outside of the US. Calls to international numbers are billed according to your international long distance plan.
Can I use tmobile WiFi calling internationally?
If you’re in a foreign country and are using WiFi Calling, you are TECHNICALLY on T-Mobile’s network at that point, therefore no additional charges happen (unless you call an international number). WiFi calling is an extension of T-Mobile’s network