The answer for question is still available if you previously subscribed to the original network’s international roaming service. When you arrive in Vietnam, you just need to reinstall and turn on international roaming mode. Then your phone will automatically receive signals from carries in Vietnam. However, the fees used for communication and data for foreign SIM cards will be relatively high.
But if you use an international SIM card (also known as a tourist SIM), the answer maybe that it can’t be used in Vietnam. Because this type will specify an area and country that you can use. If you use an international SIM card that doesn’t include the Vietnam country, the phone will not receive signal because it isn’t in the correct operating area.
Therefore, if investors and your relatives live in Vietnam for permanently, you need to buy a local SIM card which is both convenient for communication, use data, easily register as well as the fees will be cheaper than using a foreign SIM card or an international SIM card. The three largest Vietnamese phone providers, including: Viettel, MobiFone and Vinaphone.
Local SIM cards in Vietnam are incredibly affordable. For just $5, you can purchase a SIM card that comes with 2 GBs of mobile data. If you are looking for a monthly data plan, you can acquire 28 GBs of mobile data for just $6. The Internet is often included in the rent of apartments in Vietnam. If not, you can buy data from the phone providers.
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