What MXH100 actually is
The VietSIM catalogue lists Vietnamese mobile plans under the codes the carriers themselves sell them by — codes like V90B, and codes like MXH100. Those codes belong to the domestic market: they are the labels a Vietnamese subscriber sees when comparing a monthly package on their own network.
That is the whole of it. A plan code is an identifier, not a product description. It tells you which package a carrier sells, not what a visitor should buy. If you searched for MXH100 because you saw it somewhere and wondered whether it was a tourist SIM, the short answer is that it is not aimed at you.
Why travellers keep landing on plan codes
Vietnam's mobile market is dense. Three networks dominate — Viettel, VinaPhone and MobiFone — and each sells dozens of packages with short alphanumeric names. If you have read a forum thread, a price list or a shop sign, you have probably seen a handful of these codes without any explanation attached.
For a visitor, none of that matters much. Traveller connectivity in Vietnam comes down to three practical choices, and a carrier plan code is not one of them.
| What you are looking at | Who it is for | Can a visitor buy it? |
|---|---|---|
| Carrier plan codes (for example MXH100, V90B) | Vietnamese subscribers on a domestic contract or top-up | No — these are domestic packages |
| A physical tourist SIM bought on arrival | Short-stay visitors | Yes, at airports and city shops |
| A prepaid Vietnam eSIM bought before you fly | Visitors who want to be online the moment they land | Yes — this is the one to buy |
If you want the fuller picture of how the three networks differ, our comparison of Viettel, VinaPhone and MobiFone covers it without the plan-code noise.
What to buy instead
Buy a prepaid Vietnam eSIM before you travel. You install it on your phone at home, it activates when you reach Vietnam, and you skip the arrival-hall queue entirely.
The Vietnam eSIM store is where the plans live. Pick by data volume and trip length rather than by any code: a short city break needs far less than a two-week run down the country. If you are weighing whether a fixed allowance or an "unlimited" plan suits you better, read what unlimited data really means on a Vietnam eSIM before you choose — the word does not mean what most people assume.
Two things to check before you buy:
- Your phone supports eSIM. Most recent iPhones and Androids do; some regional variants do not. Our Vietnam eSIM guide for iPhone and the Android setup guide both walk through compatibility and dual-SIM behaviour.
- You know how activation works. Installation is done before you fly; activation happens on arrival. The step-by-step activation guide covers installation, first connection and the common first-connection problems.
If you would rather buy on arrival
Some travellers prefer to sort connectivity after landing, and that is a legitimate choice. Vietnam's main airports all have SIM counters, though prices, opening hours and queues vary by terminal and by time of day. We have arrival-specific guides for Tan Son Nhat in Ho Chi Minh City and Noi Bai in Hanoi, plus city-level guides for Hanoi and Ho Chi Minh City if you would rather buy in town.
The trade-off is simple: an airport SIM means a queue and a cash transaction right after a long flight; an eSIM means you are already online when the plane doors open. Neither is wrong, but only one of them can be done from your sofa.
What an eSIM does not include
Be clear about the boundaries. A Vietnam eSIM gives you data connectivity on the network named in the plan's product record. It is not a domestic carrier package, it does not come with a Vietnamese phone number unless the plan says so, and it is not a top-up service for a Vietnamese SIM you already own.
If you need a local number — for calls to Vietnamese landlines, for example, or for a service that insists on one — our explainer on whether a Vietnam eSIM comes with a phone number sets out what is and is not possible. For most travellers, messaging apps cover everything they need.
The short version
MXH100 is a domestic plan code. Ignore it. Buy a prepaid Vietnam eSIM before you fly, install it at home, and land connected. If you have already bought one and lost the order email, the help centre is the place to start — order links arrive by email and there is no public lookup page.