WiFi Calling from outside the US to US

Discussion in 'iPhone Tips, Help and Troubleshooting' started by pmcjr, Jan 20, 2017.

  1. pmcjr macrumors member

    Jan 12, 2013
    AT&T allows wifi calling calls from countries outside the US to US based numbers. Does anyone know if these calls require the + sign prefix as the international exit code or do the calls work just by dialing 1+the 7 digit number?
  2. C DM macrumors Sandy Bridge

    Oct 17, 2011
    Should work as if you are calling from within US as it's basically calling from your US number.
  3. pmcjr thread starter macrumors member

    Jan 12, 2013
    Thank you. You could always use the + prefix if just the US numbers don't connect the call. If you're in Airplane mode with wifi turned on, it won't cost you either way.
  4. C DM macrumors Sandy Bridge

    Oct 17, 2011
    I don't think I even have the 1- for numbers I call in US, and similarly used outside of US (this was with Verizon's Wi-Fi calling, but as I recall AT&T's and basically all of them work about the same).
  5. johnparks1 macrumors newbie

    Apr 6, 2017
    Kingston, Canada
    I believe different SIM companies set it up differently. Sugar Mobile requires the +. I phoned from Scotland/Ireland and Northern Ireland to Canada regularly over WiFi with no charge and no problems.
  6. jetsam, Apr 13, 2017
    Last edited: Apr 13, 2017

    jetsam macrumors 6502

    Jul 28, 2015
    The "1" prefix is never needed for cell phone calls on US carriers in the US (or logically in the US). Dialing "1" before a seven or ten digit number was the old POTS Telco way of saying "this is going to be a toll call, please give me access to the toll system." (My Comcast VoIP service also does not ever require a "1" before a number.) Because so many people are used to starting phone calls with the number "1", it's never flagged as an error - it just isn't required.

    What can be confusing is the US country code is also "1". But that's really just a coincidence.
    --- Post Merged, Apr 13, 2017 ---
    Right - when using AT&T WiFi calling, you are logically sitting in your house making the phone call, no matter where you are physically.
    Note, too, you probably want to avoid making international calls on Wi-Fi calling while abroad. Even if the call is only going 50 feet, you will pay AT&T's fairly high international rates as if you were calling from the US.

Share This Page