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AT&T related help: Wi-Fi Calling set up

estep0511's profile

New Member


1 Message

Saturday, June 4th, 2022 3:41 AM

What is SMSC number

Trying to set up wifi calling threw a app

Community Support


225.7K Messages

2 years ago

Hi estep0511, we're here to help you with the SMSC number to set up Wi-Fi calling.


The common Message Center Number for new and existing AT&T wireless customers is:

  • +1.312.314.9810
  • This number is provided on all AT&T SIM cards nationally. 

For more information on setting up Wi-Fi Calling review the following steps.

  1. Tap Settings on your phone, then tap Cellular (Apple devices) or Connection (Android devices).
  2. Check if Wi-Fi Calling's listed.
    • If it is, select Wi-Fi Calling.
    • If not, your phone isn’t compatible.
  3. Review important info and confirm your emergency 911 address.

Let us know if this information helps, and thank you for contacting the AT&T Community Forums.


Jeff, AT&T Community Specialist

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