Data in Hanoi: the Old Quarter, Tet, and the trips that start here

Hanoi does not cost more

Vietnamese eSIM prices are national. Nothing sold for Vietnam is priced differently for Hanoi, and no provider offers a Hanoi-only product. The full price comparison lives on the Vietnam hub; this page is about the three things Hanoi genuinely changes.

They are a street layout that defeats navigation, one week of the year when the network buckles, and the fact that the hardest coverage in the country starts a few hours up the road.

The Old Quarter is a maps problem, not a coverage problem

The Old Quarter is 36 guild streets, each named for the trade historically practised there — Silk Street, Paper Street, Tin Street, Silver Street. The names tell you what was once sold there and nothing at all about where you are, which is why the area is genuinely disorienting on foot.

Google Maps handles it. The complication is that signal can be intermittent in the densest alley sections, so download the offline map area before you walk in rather than relying on a live fix while standing in a lane two metres wide. That is the one real coverage quirk in central Hanoi.

Everything else in the city is straightforward. Hoan Kiem Lake and the Turtle Tower area are well connected. Metro Line 2A, elevated across the south of the city, has partial coverage at stations. Grab is the standard way to move, and each booking needs very little data — but it does need you to be online at the kerb, which is the practical argument against buying the smallest plan on the board.

Tet is the one date that changes what you buy

Tet, the Lunar New Year, falls in late January or February and causes city-wide network congestion for three to five days.

Congestion is not a coverage problem and you cannot buy your way out of it. An unlimited plan does not help when the cells are full; neither does a different provider. What helps is doing the fetching in advance — maps, tickets, booking confirmations, translations, anything you would otherwise pull down on the day — before the holiday starts. Assume messaging will be slow and that a Grab may take a while to match.

If your trip lands on Tet, that is also an argument for having your data sorted before you arrive rather than joining a queue at a counter in the middle of the busiest travel week in the country.

Hanoi is the staging post for the trips where the network matters

Sapa, the Ha Giang Loop and Ha Long Bay cruises all depart from Hanoi, and those are the places where Vietnamese coverage stops being uniform. Our coverage data credits Viettel as the only reliable carrier in the Sapa highlands, on the Ha Giang Loop and on Ha Long Bay.

We cannot point you at an eSIM that guarantees it, or even claims it. Neither Airalo nor Saily publishes a host network for Vietnam — this page previously credited Saily with a Viettel and Vinaphone listing, and reading Saily's own pages on 16 August 2026 showed it names no carrier at all. Neither does Nomad, whose Vietnam prices we read at source on 17 August 2026 and which names no carrier there or anywhere — an earlier version of this page said it listed Mobifone and Vinaphone. Nor does Holafly, whose GPC Vinaphone entry in our data came from the same place. 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.

So if the northern leg is the reason you want data, buy a local Viettel SIM in Hanoi rather than betting on which network an eSIM lands on. City shops are cheaper than the airport, a passport is required and registration is enforced, and Noi Bai's counters run to about a twenty-minute queue at peak. Our where to buy page has the counters and prices.

For a Hanoi-only stay

For a few days in the city and a day trip or two, 5 GB is comfortable. Airalo's Xin Chao package is $10 for 5 GB over 7 days or $11 over 30 days, both read off its checkout on 13 August 2026, and Saily's 5 GB month is $10.99, read off its own site on 16 August. If you are mostly on café and hotel wifi, Saily's 3 GB month at $7.99 is the better shape — Airalo's 3 GB costs the same $8 but runs out after a week. The cheapest entry point in our data is Saily's verified $3.99 for 1 GB over seven days.

Avoid the 1 GB tier if you are relying on maps and Grab. At a verified $4 for 1 GB over three days from Airalo, or $3.99 over seven from Saily, it is the worst value we hold for Vietnam, and an evening of navigation in the Old Quarter will eat a meaningful part of it.