e911 troubleshooting for Wi-Fi Calling

Learn how to troubleshoot Wi-Fi Calling e911 problems. If you have not added an e911 address to your My T-Mobile account, you will see the error 'REG09: Missing 911 address' when you try to use Wi-Fi Calling.


When you dial 911 using Wi-Fi Calling, your location may not be automatically provided to the dispatcher. To help save time in the event of an emergency, you will not be able make and receive Wi-Fi calls until an e911 address is provided.



Update your e911 address



Troubleshooting steps

To add an e911 address, follow these steps:


  1. Open the T-Mobile My Account application.
  2. Tap Account info.
  3. Tap Settings.
  4. Tap 911 Address.
  5. Enter your home address.
  6. Tap Continue.

    Note: Allow up to one hour for the e911 address to update.