Wi-Fi calling: Nokia Lumia 635

Learn how to set up and use Wi-Fi calling and connection preference on the Nokia Lumia 635.




Turn on & connect

To use Wi-Fi calling, you must first register an E911 address and turn on Wi-Fi to connect to a Wi-Fi network.


  1. Register your E911 address at My T-Mobile.
  2. Turn on Wi-Fi.
  3. Swipe left on the Start screen.
  4. Tap Wi-Fi Calling.
  5. Tap the Wi-Fi Calling switch 'On'.


Set connection preference

  1. Swipe left on the Start screen.
  2. Tap Wi-Fi Calling.
  3. Swipe left to preferences.
  4. Tap desired connection preference:
    • Wi-Fi Preferred
    • Cellular Preferred
    • Wi-Fi Only