Will Grab work in the Old Quarter?

Yes, once the Vietnam line is the mobile-data SIM and data roaming is off. Alleys lose indoor signal the way old brick always does. Step outside if a pin will not drop.

5G exists in parts of the city. Opensignal’s national 5G coverage score for Viettel was only 1.1 out of 10 in August 2026, so plan on 4G as the normal experience and treat 5G as a bonus.

Do you have a Hanoi-only speed test?

Not from us, and not from the Opensignal or nPerf reports cited here. Those reports are national. We have not found a published city breakdown for Hanoi to put next to them.

Does indoor cafe Wi-Fi replace the eSIM?

Use cafe Wi-Fi if you want. The eSIM is what works between cafes, and on the way back to Noi Bai.

When does the daily 5GB reset?

At 23:59 Vietnam Standard Time, GMT+7. Using it up at 11 p.m. means a short wait, not a new purchase, unless you need data in that hour.

Viettel coverage in Hanoi

Central Hanoi is ordinary urban Viettel coverage: the Old Quarter, Hoan Kiem, and Tay Ho are not the hard part. The hard part is the highway north, where the same eSIM is what you will use for Ha Long, Ninh Binh, and the road toward Sapa.

The city itself

Hanoi is dense, flat, and full of macro sites. Walking from Hoan Kiem to the French Quarter, or riding Grab to Tay Ho, is not a coverage puzzle on Viettel. What travelers notice instead is indoor loss: tube houses, thick hotels, and basements of shopping malls. If Maps will not load at the back of a cafe, the fix is usually the front door, not a new APN. The Vietnam line should be the only line allowed to use mobile data. The home SIM stays on for SMS.

A normal Hanoi day is maps, a handful of Grab rides, chat, and photos. That pattern fits in 5GB with room to spare. The day that does not fit is a laptop on hotspot for a full work session plus video calls. Hotspot is allowed. It spends the same daily bucket. There is no separate hotspot cap on our plan, and there is also no slowed unlimited mode when the bucket ends.

Leaving the city

The airport road north to Noi Bai is covered. The expressway toward Ha Long is covered in the ordinary sense of a national highway, with short dips at cuts and bridges. Ninh Binh’s tourist core, Tam Coc and the boat docks, is a town, not a wilderness. The moment the trip becomes a mountain trip, read the Sapa and Ha Giang pages instead of assuming the Old Quarter experience continues. Viettel is the network people choose for that drive because its rural grid is the wide one. It is not immune to valleys.

Download offline maps for the north before you go, even with a working eSIM. A tunnel or a gorge is a bad time to discover that the next turn instruction needed a fresh tile. Offline maps are a few hundred megabytes once, which is cheap against a 5GB day, and they keep working when the radio does not.

Published speeds, and what they are not

We do not publish an eSim For Vietnam speed test for Ba Dinh or for Long Bien. The numbers below are national. Use them to compare operators, not to predict the cafe you are sitting in.

Published speeds for Viettel

These figures come from independent reports. They are national results, not a test run by eSim For Vietnam in Hanoi, and not a promise of the speed you will see on a given street.

Everyday download speed: Viettel 56.7 Mbps, compared with MobiFone 55.4 Mbps and Vinaphone 54.6 Mbps.
5G download: Viettel 247.5 Mbps. MobiFone measured 320 Mbps and Vinaphone 339.2 Mbps on 5G in the same report.
5G upload: Viettel 26.3 Mbps, MobiFone 31.9 Mbps, Vinaphone 29.4 Mbps.
Coverage experience (0–10): Viettel 8.4, Vinaphone 5.5, MobiFone 4.3.
5G coverage experience (0–10): Viettel 1.1, Vinaphone 0.3, MobiFone 0.2.
Consistent quality: Viettel 78.8% of tests, MobiFone 77.4%, Vinaphone 68.6%.

Source: Opensignal, Vietnam Mobile Network Experience, August 2026 (collected 1 April 2026 – 29 June 2026). Read the report.

nPerf’s 2026 edition, measurements April 2025 – March 2026 ranked Vinaphone first overall (74,587) and Viettel second (71,703). In that barometer Viettel’s download bitrate was 76.48 Mb/s (+49% versus the previous nPerf year). nPerf also credited Viettel with the lead on overall latency and on web browsing.

Source: nPerf, Barometer of mobile Internet connections in Vietnam, 2026 edition, measurements April 2025 – March 2026. nPerf PDF.

Ookla’s Speedtest Global Index for Vietnam, updated August 2026, shows a country median mobile download of 360.77 Mbps, upload 59.84 Mbps, and latency 20 ms. That median mixes every operator. It is not a Viettel score.

Source: Ookla Speedtest Global Index, Vietnam median country speeds, August 2026. Speedtest Global Index.

If you want the arrival sequence for Terminal T2, the Noi Bai guide covers the counter, the published Wi-Fi name, and the ride into Hoan Kiem. Coverage and arrival are different jobs.

Viettel coverage in Hanoi

The city itself

Leaving the city

Published speeds, and what they are not

Get the local Viettel eSIM

Questions