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HD Voice FAQs

Basics and Benefits

Making Video Calls (only applicable to Video Calling-capable phones)

Making 6-Way Calls




  1. Why did I receive a "Cannot Activate LTE Calls" error message when attempting to change the "Enable LTE" setting to "Voice & Data" on my iPhone 6 or iPhone 6 Plus?

    There are several reasons why you may have received this error message. Please refer to our Wi-Fi Calling error message page for more information.

  2. Android is a trademark of Google, Inc.
    iOS is a trademark or registered trademark of Cisco in the US and other countries and is used under license.
    iPhone is a registered trademark of Apple Inc.

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