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Important Android security issue – how to disable Wi-Fi Calling to protect your phone

Ultra cares about your security. A security flaw in Android phones was recently discovered and could impact a small set of phone makes and models. This is not an Ultra network issue. If you believe your device may be impacted, we strongly recommend disabling Wi-Fi Calling until the vulnerability has been fixed by the phone’s manufacturer.

If you have Wi-Fi Calling enabled, here’s how to turn it off:
– Navigate to and open Settings
– Tap Connections
– Tap Wi-Fi Calling
– Tap the switch to turn the feature off


On some phones, you can also disable Wi-Fi Calling from the quick settings panel:
– Swipe down from the top of the screen
– Tap the Wi-Fi Calling icon to turn it off

Reports indicated that the devices impacted by the security issue are as follows:

  • Vivo phones, including those in the S16, S15, S6, X70, X60 and X30 series
  • Google Pixel 6 and 6 Pro, Pixel 6a, Pixel 7 and 7 Pro
  • Any wearables that use the Exynos W920 chipset
  • Any vehicles that use the Exynos Auto T5123 chipset