MacRumors has received tips from customers who were able to activate Wi-Fi calling and we were able to activate the feature on our own iPhones. A number of readers in our forums are also having success activating Wi-Fi calling.
Wi-Fi Calling allows devices to place calls over a wireless connection when cellular connectivity is poor. When the feature is switched on, an iPhone will use the Wi-Fi network it is logged into for phone calls, improving the quality of the call.
AT&T customers can turn on Wi-Fi Calling by going to: “Settings” -> “Phone” -> “Wi-Fi Calling,” and toggle the “Wi-Fi Calling on This Phone” switch to on. (GREEN). Users will also have to enter a 911 emergency address to complete the process.
Once the process is complete, customers should receive a notification letting them know the feature will be available after a short activation period.
Customers will need to have AT&T HD voice features enabled, as well as an available Internet connection. MacRumors notes the new feature can be used for voice calls within the United States, Puerto Rico, and United States Virgin Islands at no charge. Long distance global voice calls will be charged standard long distance rates.