Roaming in Europe: How to Sign Up and Which Plan to Choose

Roaming in Europe (international roaming) lets you keep your Vietnamese phone number to make calls, send texts and use data in Europe without changing your SIM. All 3 major carriers in Vietnam – Viettel, Vinaphone and MobiFone – support roaming in Europe, each with its own plans and sign-up process. To use the service, your line generally needs to be active for both outgoing and incoming services, and you must turn on international roaming (free of charge) before subscribing to a specific plan.

How to sign up for roaming in Europe with each carrier

1. Viettel

Sign up from Vietnam: text CVQT to 138 (free), or use the My Viettel app (International Roaming section), the vietteltelecom.vn website, or a Viettel store.

Sign up once you're in Europe: dial the USSD code 1381# and follow the instructions.

Cancel the service: to cancel international roaming entirely (you will no longer be able to roam), text HUY to 138; to cancel just one plan while keeping roaming enabled, text HUY [PLAN NAME] to 191 (e.g. HUY REU15 to 191).

Support while abroad: contact Viettel's international roaming hotline – the number is listed in the My Viettel app and on Viettel's official website (calls from abroad may be charged).

2. Vinaphone

Sign up from Vietnam: text DK CVQT to 9123, or use the My Vinaphone app (Roaming section), the digishop.vnpt.vn website, or a Vinaphone service point.

Sign up once you're in Europe: dial the USSD code *101# to activate.

Support while abroad: contact Vinaphone's international customer service hotline – the number is listed in the My Vinaphone app and on VNPT's official website.

3. MobiFone

Sign up from Vietnam: text DK CVQT ALL to 999, or use the My MobiFone app (International Services section), the mobifone.vn website, or a MobiFone store.

Sign up once you're in Europe: dial the USSD code 0932*1# to activate.

Support while abroad: contact MobiFone's international roaming hotline – note that MobiFone changed this hotline number on 10 April 2025, so check the latest number in the My MobiFone app or on mobifone.vn before you travel.

Which Europe roaming plan should you choose?

Each carrier has its own plans for Europe, mostly priced around 400,000 VND for 2–5GB over 15 days, or 800,000 VND for 5–12GB over 30 days (reference prices, subject to change).

Compare the Europe roaming plans below to find the one that suits you best (reference prices, subject to change):

Viettel currently offers only 2 plan options for Europe (15 days or 30 days) – if your trip is shorter than 15 days, you'll still need REU15, as Viettel doesn't yet have a shorter plan for this region.

Vinaphone has no Europe-specific plan. The RU1 plan (unlimited data in 97 countries) is its best multi-country option, but the daily charge is fairly high, so it's better suited to short trips.

MobiFone's plans cost about the same as Viettel's but come with less data and narrower coverage.

What should you keep in mind when roaming in Europe?

• Turn on Data Roaming when you arrive (Settings > Mobile/Connections > turn on Data Roaming) and switch it off when you're not using it to avoid unexpected charges.
• Check your remaining data regularly via the app or a balance-check code (e.g. Viettel: text KTTK to 191) to keep costs under control, and remember to cancel the service when you return to Vietnam if you no longer need it.

Roaming or a travel SIM/eSIM for Europe?

Roaming is the traditional, convenient option that lets you keep your Vietnamese number to receive calls, texts and bank OTP codes while in Europe. However, if you want cheaper data or a wider choice of plans, a Europe SIM or eSIM is the better solution. In particular, if your phone supports it, a Europe eSIM (such as TouriESIM's) helps you save money while keeping your main SIM active for calls and texts during your trip. See also: eSIM vs roaming compared.

Here's how the cost of data compares for a 15-day trip to Europe (roaming prices are for reference and subject to change):

• TouriESIM's Europe travel eSIM: usually considerably cheaper per GB – see plan prices at Europe 33 Countries eSIM
• Viettel's REU15 roaming plan: 5GB for 400,000 VND (~80,000 VND/GB)
• MobiFone's Roam EU1 plan: 2GB for 400,000 VND (~200,000 VND/GB)

Clearly, a travel eSIM is the more economical choice if you mainly need data.

Buy TouriESIM's Europe 33 Countries eSIM and get your QR code by email right after payment!

→ TouriESIM also offers other eSIM plans covering Europe to suit different needs:

• Europe Orange Data + Calls eSIM (includes voice calls – see the plan page for details)
• Europe 40 Countries eSIM
• Europe 8 Countries eSIM

Frequently asked questions

Will I be charged if I don't cancel roaming after returning to Vietnam?

You may be charged if your phone still picks up a roaming network near a border or if Data Roaming is still on. Turn off Data Roaming as soon as you land and cancel your plan if you no longer need it.

Can I use roaming in Europe if my phone is carrier-locked?

Yes, because roaming uses the same Vietnamese SIM that is already in your phone – there's no need to switch SIMs. A carrier lock only matters when you want to use a SIM from a different carrier; it doesn't affect roaming. If you plan to use a travel eSIM, check whether your phone is carrier-locked.

Do I need to provide ID to sign up for roaming?

No, because it's an add-on service for your existing registered Vietnamese number, not a new SIM. This is different from buying a SIM or eSIM in the destination country, where some countries may require a passport under local regulations.

If I visit several European countries on one trip, do I need to sign up for roaming in each country?

No. Europe roaming plans cover every country on the plan's list – your phone automatically switches to the appropriate partner network as you cross borders, with nothing more for you to do.