Learn how to dial international numbers.
If you’re using a T-Mobile phone, 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.
Examples of dialing from a mobile phone:
|Location||IDD||Country Code||City or Mobile Code||Phone Number||Full Number Dialed|
|Seattle, WA USA||+||1||206||XXXX-XXXX||+1-206-XXXX-XXXX|
|Mexico City, Mexico||+||52||55||XXXX-XXXX||+52-55-XXXX-XXXX|
When dialing to another country from a US landline, dial 011 before the country code and then the phone number.
An International Direct Dialing (IDD) code is needed whenever you make a call from a landline in one country to another country.
Countries that are part of the North American Numbering Plan (including the US) use 011 for their IDD code. The large table below shows a list of IDD codes and country codes.
When calling some countries, you may hear an automated message prompting you to enter a random digit between 0 and 9 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.