Calling while in Europe; + and then country code?

Is this the first time you've tried to call while traveling internationally? Did it work on other numbers in Ireland? If not, I'd suspect that AT&T hasn't turned on international dialing.

Do the numbers that you entered start with a zero? When making a local call in the UK, dialing codes start with a zero, so advertising or websites will show something like 0207 123 4567.

If you are dialing internationally you first put the international dialing number (00 from UK, 011 from US and Canada) or much simpler so you don't have to worry where you are, use the + symbol on an app or mobile phone.

Next bit of the number is the country code for the country you are calling, 1 for North America, 44 for UK, etc.

The next bit for calling many countries (but often not Italy) is to drop the leading zero of the dialing code, and put the zero-less dialing code and local number.

So, for the example above ( a made-up inner London number) if you are at a house in the UK and use the hall phone or a local British mobile, you just dial 02071234567.

If dialing from overseas use +442071234567. Note the missing zero.

Good luck....

Ray, I have not been successful with any call while in Ireland. Nigel, no zeros in the numbers. I used + and then country code and then phone number. I did confirm on line with ATT that passport was in place before leaving USA. Thanks for any more suggestions.

Val,
If it were me I'd try the following methodical process of elimination:

Say I am trying to phone the Hilton Paddington. Their phone number is listed on the Hilton website as +44 20 7850 0500

If I were in Ireland I would try, in this order:
00 44 20 7850 0500
00 44 020 7850 0500
+44 20 7850 0500
011 44 20 7850 0500
(these last two are to see if my US phone is smarter than I am and will correctly guess what I am trying to do)

If I am in the UK I would try, in this order:

020 7850 0500
20 7850 0500
+44 20 7850 0500
011 44 20 7850 0500
(these last two are again to see if my US phone is smarter than I am and will correctly guess what I am trying to do)

If I were in Ireland trying to call the Hilton Dublin I would try, in this order:
0 1 402 9988
0 402 9988
+353 1 402 9988
011 353 1 402 9988
(these last two are again to see if my US phone is smarter than I am and will correctly guess what I am trying to do)

If none of those work I suggest trying to contact ATT to double check your international dialing is set up.

As far as I know ATT does not do anything to "set up" international calling. We have called Italy, England, etc. on our phones both with and without signing up for their international plan. All that does is reduce the per-minute charges and maybe give you some data usage if you buy that too. You are free to dial foreign numbers without signing up. About half our international trips we do not sign up and the phones work just fine.

I think there is something else going on.

I appreciate all suggestions. Perhaps, I have not turned on correct settings. All of your suggestions regarding settings are welcome.