Buying a SIM card at Noi Bai International Airport (HAN)

Three carriers, and the longest queue in Vietnam

Noi Bai's arrivals counters carry Viettel, Vinaphone and Mobifone. That is the widest choice at any Vietnamese airport in our records, and it comes with the longest wait: around 20 minutes at peak and about 8 off-peak. When the mid-day international arrivals land together, the queue runs 20 to 30 minutes.

The counters close at 22:00.

You need your passport. A Vietnamese prepaid line is registered against a document, so this is not a hand-over-the-cash purchase — the desk scans, types and hands back, and that is where most of the twenty minutes goes. Our data records a typical airport SIM at about $7, but not what allowance that buys. Treat it as the price of getting a working Vietnamese number, not as a figure to set against a data plan gigabyte for gigabyte.

Below that level, we hold nothing: not which terminal or hall the desks sit in, not what time they open in the morning, not whether the 22:00 close flexes for a delayed flight. If your plan depends on any of those, this page cannot support it.

The 22:00 close is the decision, not the queue

A large share of long-haul flights into Hanoi land at night, and for those passengers the counter question answers itself — there is no counter. Free wi-fi is generally available in the terminal, which is enough to book a car, but you will leave the airport without a Vietnamese number and sort it out in the city the next morning.

That is the real reason to decide this before you fly rather than after you land. An eSIM installed at home comes up when the aircraft doors open, at 02:00 as readily as at 14:00. If you would rather have plastic in your hand, check your scheduled arrival against 22:00 first, and leave yourself a margin for the immigration hall.

If you are going north, this is the one queue worth joining

Noi Bai is the staging point for Sapa and the Ha Giang Loop, and that changes the calculation here in a way it does not at Vietnam's other airports. Signal in the northern highlands falls away with altitude rather than distance — Sapa is fine in town and unreliable above the tree line — and Viettel has the broadest reputation for reach up there.

The standard advice is to make sure your travel eSIM runs on Viettel. You cannot follow it, because no seller offers it. Neither Airalo nor Saily publishes a host network for Vietnam at all: we had Saily down as Viettel and Vinaphone until we read its own pages on 16 August 2026, which name nobody. Nomad publishes none either, in Vietnam or in any of the 47 countries it sells in — an earlier version of this page said its listing named Mobifone and Vinaphone, which was wrong. Holafly publishes nothing either — the GPC Vinaphone entry our data carried against it came from our own records rather than from the seller. The Mobifone name our data carried against eSIMCard's Vietnamese rows came from this site's generated text rather than from eSIMCard, and has gone with its prices — it is the only one of the six that publishes a host network at all, so its own listing is the place to look. Either way, it is not Viettel.

The only way to be certain you are on Viettel is to hold a physical Viettel SIM, and Noi Bai's arrivals hall has a Viettel desk. If your trip runs into the mountains, twenty minutes there is the best-spent airport queue in the country. It is close to the only place on this site where the answer is "yes, queue".

For a city break in Hanoi, none of that applies. All three networks cover the capital, and the reason to skip the counter is simply that you would rather not stand in it.

What the eSIM alternative costs

Read that table from the bottom. The small plans look cheap and are not: a single gigabyte costs $2.90 to $4.00, roughly half the price of a whole physical SIM at the desk. The unit rate keeps falling all the way up the ladder, and the strongest value in the Vietnamese data is Nomad's 50 GB at $39 — $0.78 a gigabyte, roughly a fifth of the 1 GB rate, and read off Nomad's own site on 17 August 2026. An earlier version of this page gave that title to Airalo's 50 GB at $49 on the grounds that Nomad's row was indicative; it is not indicative any more.

Full pricing for every provider we track is on the Vietnam hub.