Available on selected enabled BT Mobile handset plans. 4G Calling also available on iPhone 6 and above – 4G connection required. Wi-Fi Calling also available on iPhone 5S and above - Wi-Fi connection required. All calls or texts charged as per your BT Mobile plan. Terms apply. 4G & BT Wi-fi in more places. For BT Wi-fi see: btwifi.com.
How to Make Free Wi-Fi Calls While Traveling Overseas Apr 28, 2016 Wifi and 4G Calling explained | O2 With Wifi and 4G Calling you’ll move seamlessly between wifi and 4G network coverage to continue your call. And you can still check your social media or send an email while you’re on the phone. Wifi and 4G Calling is available on many of our devices.
Pros and Cons of Wifi Calling | Wifi vs. Cellular Calling
How to Enable Wi-Fi Calling on an Android Phone Oct 27, 2017 Wi-Fi Calling from AT&T
Thanks for fixing the wifi calling feature in latest wp8.1 update. Works fine now, both SMS and call. However, voicemail does not sync. Have to disconnect and use regular cell network to sync visual voice mail. And of course would be nice to have seamless handover to LTE like iPhone 5s and 6 has.
Wi-Fi Calling Feature | Bell Mobility | Bell Canada