Vietnam Travel eSIM Networks: Viettel, Vinaphone and MobiFone

Why Vietnam’s registration rule is the strictest in the region

Vietnam is a cheap data market with fast networks and one unusually strict rule, and the rule is the reason this destination behaves differently from its neighbours.

Every local SIM has to be registered in person. That means the original passport rather than a copy or a photograph, and a live selfie taken at the counter, so the process cannot be completed in advance or on someone else’s behalf. There is no address or tax number requirement for a prepaid line, but the identity step itself is not negotiable and there is no remote route through it.

For a visitor the practical consequence is that the local SIM is cheap and costs you a counter visit, while a travel eSIM bought before you fly has data working the moment you clear immigration. All 10 brands we track take that second route, and our Vietnam plan ranking compares them on price and allowance.

What the counter process actually involves

The registration requirement comes from Vietnam’s telecom rules on subscriber identity, and the counter process reflects how strictly they are applied. Expect to hand over the original passport, have it recorded, and take a live photograph at the counter as part of the same transaction. A photocopy or a picture on your phone will be refused.

Where you complete it matters less than it used to. Carrier stores in Hanoi and Ho Chi Minh City handle it, and the airport counters do the same thing. The step that is genuinely missing is the online one: Vietnam does not offer a buy-now activate-on-arrival path for a local line, and the requirement follows the line rather than the physical card.

The honest case for buying locally is a long stay. A Vietnamese number is useful for ride-hailing accounts, for delivery, and for a local bank or wallet if you are staying long enough to want one. For a two week holiday the counter visit buys you very little that an eSIM cannot do.

Which Vietnamese network to ride

Vietnam is one of the destinations where the three networks genuinely diverge outside the cities, so the host network on your plan is worth checking before you buy on price.

Viettel is the network that covers the north

Viettel won Download Speed at 56.7 Mbps, Coverage at 8.4 out of 10 and Consistent Quality at 78.8% in Opensignal’s August 2026 report. Those are the broadest awards of the three, and they match the practical reputation: the northern mountains behind Ha Giang, the road up to Sapa and the karst around Ha Long Bay are where Viettel keeps a signal and the others often do not.

Vinaphone has the fastest 5G

Vinaphone took 5G Download Speed at 339.2 Mbps, which is the highest 5G figure in our entire data set and a reminder of how fast Vietnamese 5G can be where it exists. Its profile sits a band below Viettel on overall speed and coverage, so it is the better host for a city itinerary and the weaker one for a northern route.

MobiFone wins on upload and video

MobiFone took Upload Speed, Time on Network at 98.9% and Video Experience, which is a different set of strengths: staying connected and uploading rather than downloading fastest. Time on Network in particular is the measure of how rarely you fall back to nothing, and 98.9% is a strong figure for a third network.

Read the awards as a ranking and the speed bands as indicative ranges. One set comes from Opensignal’s independent measurement programme, the ranges are our own compilation from carrier listings, and the specific mast you attach to still decides what you feel.

Vietnam prepaid rules and why the local eSIM route stalls

Two Vietnamese rules shape how you buy data, and the second one is the reason this destination differs from Thailand or Malaysia.

The registration picture is the strictest in our data. Vietnam asks for the original document and a live selfie, so the process resists the workarounds that work elsewhere, and it applies to the line rather than the format.

That last point is what makes this destination unusual. In most countries a carrier eSIM is a way around the counter, because the identity step can be done digitally. In Vietnam it cannot, so the carrier eSIM carries the same obligation as a plastic card and the international travel eSIM is the only product that does not.

5G in Vietnam and the routes that stay on 4G

All three networks run commercial 5G and every Vietnamese carrier profile we track lists it, with Vinaphone’s measured 339.2 Mbps the headline figure. What that number does not tell you is how much of the country it covers. The 5G footprint sits in the dense urban cores, and the overall download award of 56.7 Mbps describes the experience most of the country actually gets.

The gaps are geographic and predictable once you picture the map. The northern highlands behind Ha Giang, the mountain road to Sapa, the karst around Ha Long Bay away from the harbour, the Central Highlands inland from Da Nang, and the long coastal road between Nha Trang and Quy Nhon all thin out or stop. Download offline maps before any of those, and check which network your phone has chosen when you leave a city.

An eSIM is a profile your phone downloads rather than a card it accepts, a standard maintained by the GSMA, so it works with whatever bands your handset covers. The phone compatibility checker covers specific models.

Three closing notes. If your itinerary continues into Cambodia or Thailand, buy a South East Asia regional plan rather than a Vietnam-only one, because the overland crossings are common enough that a single-country plan becomes a limitation. If the north is on your route, check the host network before you buy on price — the brand table on this page lists it for every plan we track. And for everything else, our Vietnam plan ranking lists every plan we hold, the allowance calculator sizes one to your dates, and live discounts sit on the eSIM promo codes page.