Two types of eSIM
| Type | Advantages | Limitations |
|---|---|---|
| Vietnamese operator eSIM | Local network, may include a Vietnamese number, easier to renew for a longer stay | May require registration and identity verification |
| International travel eSIM | Can be bought before travel and activated quickly after arrival | Often data-only; terms depend on the provider and partner network |
What to check before buying
- Your phone is unlocked and supports eSIM.
- The package works specifically in Vietnam, not only in a broad 'Asia' region with unsuitable roaming terms.
- The validity period and activation trigger are clear: installation versus first network connection.
- The amount of high-speed data is clearly stated.
- Tethering/hotspot is allowed if you need to connect a laptop.
- A phone number and SMS are included if you need them.
What local operators offer
Large Vietnamese operators continue to develop tourist eSIM products. At the time of review, MobiFone, for example, offers an International Travel eSIM service for foreign visitors and an official registration channel. Promotions and package details change. Check MobiFone’s official page for current offers before you buy.
How to install an eSIM safely
- Connect to stable Wi‑Fi.
- Add the eSIM via QR code or the provider's app.
- Name the lines clearly, for example 'Primary' and 'Vietnam'.
- Turn off data roaming on your primary SIM if you want to avoid accidental charges.
- Set the Vietnam eSIM as the mobile-data line.
- After arrival, enable the Vietnam line and, if required, data roaming for a travel eSIM.
When a physical SIM is better
If you are staying longer, use local calls frequently, want easy local top-ups, or your phone handles dual lines poorly, a physical SIM can be simpler. eSIM is a SIM format, not a guarantee of a better plan.
Questions and answers
Can I buy a Vietnam eSIM before arrival?
Yes. International travel eSIMs can usually be bought in advance, and local operators increasingly offer tourist online channels as well.
Will an eSIM give me a Vietnamese phone number?
Not necessarily. Many travel eSIMs are data-only.
Do I need to enable roaming?
Some travel eSIMs require it because they operate through a roaming partner. Follow the instructions for the specific provider.
Can I use hotspot?
It depends on the plan. Check tethering/hotspot before paying.