Wi-Fi calling: ZTE Obsidian

Learn how to set up and use Wi-Fi calling and connection preference on the ZTE Obsidian.




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. From any Home screen, tap the Apps icon.
  3. Tap Settings.
  4. Tap Wi-Fi.
  5. Tap the Wi-Fi Switch to On.
  6. Tap the Wi-Fi network you want to connect to. If you do not see the network, tap Scan.
  7. If prompted, enter the password. If necessary, tap Show advanced options to enter IP settings and Proxy settings.
  8. Tap Connect.


Set connection preference

  1. From any Home screen, tap the Phone icon.
  2. Tap the Menu icon in the top right.
  3. Tap Settings.
  4. Tap More.
  5. Tap Wi-Fi Calling.
  6. Tap Connection Preferences.
  7. Select one of the following options:
    • Wi-Fi Preferred
    • Cellular Network Preferred
    • Never use Cellular Network