Wi-Fi calling is a carrier-provided feature that allows you to make phone calls and send text messages where Wi-Fi is available but cellular coverage is inadequate. You can call and text (SMS/MMS) as you do on the cellular network. You need to make minor configuration adjustments on your cellular phone to activate Wi-Fi calling. Once enabled, cellular phones automatically use Wi-Fi calling when needed.
Wi-Fi Calling and Emergency Services
During setup, you'll be prompted to include an address for 911 emergency call routing. The address for 911 emergency call routing helps first responders locate you at the address where you are most likely to use Wi-Fi calling. When you place a 911 call, it uses the cellular network when possible. If no cellular network is available, the address you provide during setup will be used. It is your responsibility to make sure you keep your Wi-Fi calling location up to date for 911 as you change locations. It will not automatically update.