Dialing international numbers
Dialing international numbers can sometimes be trickier than remembering your parent's Wi-Fi password, but we're got you covered. Read below to find out all you need to know. If you're looking for detailed information on how to use your phone while in another country, check out our International roaming checklist.
Dial international numbers
- The easiest way to make an international call 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 call to another country.
- This same dialing pattern applies whether you're within the U.S. or in another country.
| Location | IDD | Country Code | City or Mobile Code | Phone Number* | Full Number Dialed* |
|---|---|---|---|---|---|
| London, UK | + | 44 | 20 | XXX-XXXX | +44-20-XXX-XXXX |
| Groningen, Netherlands | + | 31 | 50 | XXX-XXXX | +31-50-XXX-XXXX |
| Sydney, Australia | + | 61 | 2 | XXX-XXXX | +61-2-XXX-XXXX |
| Seattle, WA USA | + | 1 | 206 | XXX-XXXX | +1-206-XXX-XXXX |
| Mexico City, Mexico | + | 52 | 55 | XXX-XXXX | +52-55-XXX-XXXX |
| Tokyo, Japan | + | 81 | 3 | XXX-XXXX | +81-3-XXX-XXXX |
*Please note, XXX-XXXX is just a placeholder. Phone numbers can vary in length from 2-13 digits based on the dialing patterns and city or mobile code in each country.
To find out how much calls will cost, be sure to check out our International calling services and rates.
Call a country outside the U.S.
Dial + followed by the country code, city code (if necessary), and local number.
Call Mexico from the U.S.
- Mobile numbers: Dial + > Dial 52 > Dial the ten-digit mobile number. (some mobile numbers may require the two or three digit area code)
- Landline numbers: Dial + > Dial 52 >Dial the two or three digit area code > Dial the 7 or 8 digit number.
To find out how much calls will cost, be sure to check out International roaming services.
Call back to the U.S. from another country
Dial +1, the area code, and the number (example: +1-555-123-4567).
Call a country outside the U.S.
Dial + followed by the country code, city code (if necessary), and local number.
Call toll-free numbers from outside the U.S.
Toll-free numbers such as 1-800 or 1-888 cannot be guaranteed to work while abroad. Be sure to look up alternate numbers before you take your trip.
Call T-Mobile Customer Service from another country
From your mobile device, dial +1-505-998-3793. We won't charge you anything for this call, no matter where you are. Go ahead and store this number in your phone's contact list for easy and quick dialing while you're away.
Randomizer security
- When calling some countries, you may hear an automated message that gives you a random two-digit number between 10 and 99.
- Enter the number you hear in order to complete the call.
- T-Mobile added this extra step to help prevent fraudulent calls. It's only needed when calling certain international numbers/locations which may change over time.