WiFi Calling from outside the US to US

[pmcjr]

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?

 

[C DM]

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?

Should work as if you are calling from within US as it's basically calling from your US number.

 

[pmcjr]

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.

 

[C DM]

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.

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).

 

[johnparks1]

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).

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.

 

[jetsam]

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).

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.
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Should work as if you are calling from within US as it's basically calling from your US number.

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.