Tourist SIM Card in Vietnam: Rules and Registration

A tourist SIM card in Vietnam is safest when it is registered in your name. Bring your passport, buy from an official shop, and ask the staff to register it on the spot. That one step gives you proof the number is yours.

Why registration matters

Registering a SIM means linking the number to a named owner. Ask the shop to do this for you and keep the confirmation. A SIM with no registered owner can be hard to get fixed if it stops working.

This is why a cheap SIM from a street seller is a poor deal. If the seller never registered it in your name, you carry the risk. You may lose the number, the balance and your access to ride apps and maps in the middle of a trip.

Note for this section: this is practical advice, not a summary of the law. Check what the carrier needs from you when you buy.

What to bring

• Your passport. Carry the original, not just a copy, in case the shop wants to see it.
• An unlocked phone. Check this before you travel, because a locked phone may not accept a local SIM.
• Time. Allow a little while at the counter so nothing is rushed.

Ask staff to register the SIM in your name and to confirm the number is active before you leave the counter.

Where to buy safely

Viettel, Vinaphone and MobiFone are three well-known carriers. According to Wikipedia, Viettel launched its 4G network on 18 April 2017 with nationwide coverage of up to 95 percent. That may suit visitors who plan to leave the big cities.

Choose one of these places:

• A carrier store with the brand sign and uniformed staff.
• A carrier counter at the airport, if the airport has one.
• An authorised dealer that can show the carrier name and register you at the shop.

Avoid sellers who hand you a sealed pack and say it is already registered, or who ask you to send photos of your passport over a chat app.

Sources for this section: Wikipedia entries on Viettel and on telephone numbers in Vietnam.

How to read the number and the pack

Mobile numbers in Vietnam begin with a prefix that points to the carrier. Viettel uses prefixes such as 032 to 039, 086, 096, 097 and 098. Vinaphone uses prefixes such as 081 to 085, 088, 091 and 094. MobiFone uses prefixes such as 070, 076 to 079, 089, 090 and 093.

The prefix tells you who runs the number, which helps you check that the SIM matches the shop you bought it from. Old numbers that began with 012 were moved to other mobile prefixes starting in 2018, so you may see a reference to that in older guides.

Read the pack for three things: the data allowance, the number of days it lasts, and the start rule. Some packs start the clock the moment you insert the SIM, and others when you first top up. A pack that says it lasts a set number of days may run out sooner if you finish the data early.

Sources for this section: Wikipedia entry on telephone numbers in Vietnam.

How to avoid an expiring or blocked SIM

• Register at the counter and keep the receipt or confirmation message.
• Test calls, texts and data before you walk away.
• Note the end date of your pack and set a phone reminder two days earlier.
• If your trip runs long, top up before the pack ends so the number stays active.
• If the number stops working, go back to the same shop with your passport. Do not buy a second SIM from a stranger.

Also keep your home SIM safe. Many banks and apps send codes to your home number, so keep it in a safe place and turn on roaming only if you need it.

A short checklist

Before you land, unlock your phone and save a photo of your passport page. At the shop, show the original passport and ask staff to register the SIM. Test it, note the end date, and keep the pack. These few steps are all most visitors need.

This guide is general information for travellers and not legal advice. Rules can change, so ask the carrier what applies when you buy.

Sources

Wikipedia, Viettel, en.wikipedia.org/wiki/Viettel. Wikipedia, Telephone numbers in Vietnam, en.wikipedia.org/wiki/Telephone_numbers_in_Vietnam.