

How to call from Vietnam to the US? Making international calls might seem complicated, but with the right steps and information, it becomes quite simple. In this guide, VTJ will walk you through the easiest methods to connect with your friends and family in the US from Vietnam.
To call from Vietnam to the US, there are several methods you can use:
Direct call using 00 (+) prefix
To make a call from Vietnam to the US, dial 00 + 1 + area code + phone number, or you can use +1 + area code + phone number.
Remember to drop the leading zero in the phone number if it exists. When calling a mobile number, you don’t need to include the area code.
Example: From Vietnam to a number in California, US: Dial 001 + 1 + 345 + 1234xxxx or +1 + 345 + 1234xxxx. (1 is the country code for the US, and 345 is the area code for California)
Calling via VolP 131
This is a cheaper option for calling international numbers. If you’re using a MobiFone SIM card in Vietnam, you can use this method.
To call from Vietnam to the US, dial 131 + 00 + 1 + area code + phone number, or +131 + 1 + area code + phone number.
Again, drop the leading zero if it exists.
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MobiFone offers international calling packages that give you a set number of minutes to call the US.
After registering for the package, dial 1313 + 00 + country code + area code + phone number to use the minutes.
Example: From Vietnam to California, US, dial 1313 + 001 + 345 + 1234xxxx or +13131345 + 1234xxxx.
Mobifone’s international calling packages: TQT49, TQT99, TQT199, TQT299
VinaPhone offers a simple and convenient service called “171” for international calls.
Dialing Format: 171 + Country code + Area code + Phone number.
To save on international call costs, registering for a call package with Viettel is a good option. Here’s a simple guide:
Step 1: If you haven’t registered for Viettel’s international calling service, you can start by sending an SMS: QT ON to 133.
Step2: Once registered, you’ll receive a notification and can choose a suitable international call package. There are three ways for you to register for the plan after you have chosen one:
Viettel’s international calling packages: IFT10, IFT20, QT199, QT1, QT30, TQ10K
Step 3: After registering, use the format: 00 + 1 + Area code + Phone number to make a call.
You can also use online calling apps like Messenger, Zalo, or WhatsApp for free international calls, as long as your phone has internet access.
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Check the phone number and area code: Make sure you have the correct phone number and area code before dialing.
Ensure sufficient balance: Make sure your account has enough credit to cover the call charges.
Mastering the steps to call from Vietnam to the US can save you both time and money. By following the correct dialing formats and choosing cost-effective methods, you can easily stay in touch with your loved ones.