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Hi @toddreg and Community,

Thanks to @sandblaster, @jt212s, @lizdance40 and others for their great input.  All of you pretty much answered this one correctly, but I wanted to jump in and clarify the responses and give an update.

For more information on what Carrier Settings are, and how to update them, you can view Apple's support article.

The short version is that Carrier Settings updates let AT&T update carrier network and related settings to improve cellular network connectivity and performance or add support for features like VoLTE or Wi-Fi Calling. For more information on what is included in a carrier settings update, contact your carrier.

The most recent updates, 28.3 and 28.4, had the following effect: 

  • 28.3 - Enabled VoLTE when roaming international. 
  • 28.4 - Corrects an issue related to international customer roaming while using VOLTE.

Thanks so much, and if you have specific questions about a particular update, please feel free to send us a PM.

Thanks

Tim, AT&T Community Specialist

AT&T Customer Care

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