What is Wi-Fi Calling?
When you enable Wi-Fi calling and are in an area with poor cell coverage (like our school) your phone will use the wifi network to send and receive your phone call instead of the cell network. Where ever the cell network is good, that will be the first choice, wifi is only used where cell coverage is poor.
Your phone calls will still be charged under your plan as if they were sent from a cell network so the same restrictions apply as for regular cell calls under your plan.
How to Enable Wi-Fi Calling
You need to be running the latest iOS on your phone (iOS 9)
Go under Settings and click on Phone
Click on Wi-Fi Calling and turn it on
You are all ready to make calls where ever there is good wireless!