Make an international call

Learn how to dial international numbers.


Dial international numbers

The easiest way to make an international call, including to and from the US, is to dial the + (which should be the same key as the 0), followed by the country code, and then the phone number. The + replaces the International Direct Dialing (IDD) code when you use a mobile phone to make a call to another country.


Call another country from the U.S

Dial "+" followed by the country code, city code (if necessary), and local number.


Call while you are outside the U.S., whether you’re calling within the country or to a location outside it

Dial "+" followed by the country code, the city code (if necessary), and the local number.


Call the U.S. from another country

Dial +1, the area code, and the number (example: +1-555-123-4567).


Call Mexico from the U.S.

  • Mobile numbers: Dial + or 011 > Dial 52 > Dial 1 > Dial the ten-digit mobile number. (some mobile numbers may require the two or three digit area code after the '1')
  • Landline numbers: Dial + or 011 > Dial 52 > Dial the two or three digit area code > Dial the 7 or 8 digit number.


Call toll-free numbers while you are outside the U.S.

Toll-free numbers such as 1-800 or 1-888 may not be accessible and cannot be guaranteed to work while abroad. You should look up alternate numbers in case you are unable to reach a toll-free number.


Dialing examples


LocationIDDCountry CodeCity or Mobile CodePhone NumberFull Number Dialed
London, UK+4420XXXX-XXXX+44-20-XXXX-XXXX
Groningen, Netherlands+3150XXXX-XXXX+31-50-XXXX-XXXX
Sydney, Australia+612XXXX-XXXX+61-2-XXXX-XXXX
Seattle, WA USA+1206XXXX-XXXX+1-206-XXXX-XXXX
Mexico City, Mexico+5255XXXX-XXXX+52-55-XXXX-XXXX
Tokyo, Japan+813XXXX-XXXX+81-3-XXXX-XXXX



Things you should know

When calling some countries, you may hear an automated message prompting you to enter a random two-digit number between 10 and 99 in order to complete the call. T-Mobile added this extra step to help prevent fraud, and it's only needed when calling certain international locations.