Vietnam — Read the full guide
A Vietnam travel eSIM roams onto Viettel Mobile, Vinaphone or MobiFone. Viettel has by far the deepest national footprint, including the northern mountains and the Mekong Delta. Vietnam has switched off 2G, so an older non-4G handset simply will not connect. Buying a local SIM means a passport-registered kiosk purchase; an eSIM skips that.
Before you buy
Local Vietnamese SIM cards require passport registration: you must show your passport at an operator kiosk or shop, and the SIM is registered in your name. A roaming travel eSIM bought abroad does not require this, because it is not a Vietnamese subscription.
The network choice matters more here than in most countries. Viettel Mobile reaches furthest by a wide margin — it is the one that still works in the northern mountains, in the smaller Mekong Delta towns and on the roads between them. Vinaphone and MobiFone are strong across Hanoi, Da Nang, Hue, Nha Trang and Ho Chi Minh City and along the coastal corridor that links them, and in the cities you will not notice a difference. If your trip involves anything inland or upland, a profile that can register on Viettel is the one worth having.
Vietnam decommissioned its 2G network, which is a genuinely practical detail rather than a technicality. An older handset without 4G will not connect at all — not badly, not slowly, but not at all. 4G is the working baseline countrywide, and 5G has been rolling out in the big cities, so plan around solid LTE and treat 5G in Hanoi, Da Nang and Ho Chi Minh City as a bonus. Anyone bringing a spare travel phone from a drawer at home should check its bands before relying on it as a backup.
Coverage follows the coastal spine, and so does most of the country's tourism. The Reunification railway and Highway 1 from Hanoi through Hue, Da Nang and Nha Trang down to Ho Chi Minh City are well covered, and even the Hai Van Pass generally holds signal, which surprises people. The genuine gaps are elsewhere: the far north around Ha Giang, the Dong Van karst plateau and the high passes on the loop; remote parts of Sapa once you leave town; the Phong Nha cave systems; and boat time on Ha Long and Lan Ha bays, where cruise operators often have no usable service at all.
Day to day, Grab is the app that decides how much data you actually need. It is the default for taxis, motorbike rides and food delivery, and it wants live data at exactly the wrong moments — standing on a kerb in the rain, or trying to confirm a driver in a crowded street. Add maps, messaging and translation and most travellers still stay light, but running out is more disruptive here than elsewhere. Noi Bai (HAN) in Hanoi, Tan Son Nhat (SGN) in Ho Chi Minh City and Da Nang (DAD) are the main gateways; the SGN arrivals hall gets very congested.
Plans and prices
| Plan | Data | Validity | Price | Per GB | Daily cap | Hotspot |
|---|---|---|---|---|---|---|
| Unlimited · 1 day | Unlimited | 1 day | $3.66 | — | 500 MB/day, then 512 kbps | Included |
| 1 GB · 7 days | 1 GB | 7 days | $5.02 | $5.02 | No daily cap | Included |
| 3 GB · 15 days | 3 GB | 15 days | $13.33 | $4.44 | No daily cap | Included |
| 3 GB · 30 days | 3 GB | 30 days | $14.16 | $4.72 | No daily cap | Included |
| 5 GB · 30 days | 5 GB | 30 days | $22.24 | $4.45 | No daily cap | Included |
| 10 GB · 30 days | 10 GB | 30 days | $40.59 | $4.06 | No daily cap | Included |
Prices as of · Networks: Viettel Mobile, MobiFone, Vinaphone
When you land
Install the eSIM at home over Wi-Fi before you fly, then switch off airplane mode after landing at Noi Bai (HAN), Tan Son Nhat (SGN) or Da Nang (DAD) — it should register on Viettel, Vinaphone or MobiFone within a couple of minutes. This matters most at Tan Son Nhat, where the arrivals hall is often heavily congested and being able to book a Grab immediately is the difference between leaving and waiting.
Networks
Viettel Mobile · Vinaphone · MobiFone
Common questions
- Does an eSIM work in Vietnam?
- Yes. The profile registers on Viettel Mobile, Vinaphone or MobiFone as a roaming guest, with no restriction on foreign travel eSIMs. The one hard requirement is a 4G-capable, eSIM-capable, carrier-unlocked handset: Vietnam has switched off its 2G network, so older phones without 4G will not connect at all.
- Do I need a passport or ID registration for a Vietnamese eSIM?
- Not for a travel eSIM bought abroad. Local Vietnamese SIM cards do require passport registration at an operator kiosk or shop, and the SIM is issued in your name. A roaming eSIM is not a Vietnamese subscription, so none of that applies — you install it before you fly and nothing else is needed.
- Will it activate on arrival at Noi Bai or Tan Son Nhat?
- It should register within a couple of minutes of leaving airplane mode, which is worth having at Tan Son Nhat in particular, where the arrivals hall gets very congested and a working Grab booking saves a long queue. Da Nang is quicker. Confirm Data Roaming is enabled on the eSIM line, not your home SIM.
- Can I use the personal hotspot?
- Tethering works on most Vietnam plans and draws from the same allowance. It is useful on long train legs and on sleeper buses down Highway 1, where coverage is good but onboard WiFi is not a thing. Battery drains quickly in the heat, so carry a power bank if you plan to share all day.
- How much data do I need for two weeks in Vietnam?
- Most travellers use well under a gigabyte a day. Grab, maps, messaging and translation are all modest. What lifts the total is uploading photos and video, and streaming on long transfers between Hanoi, Hue, Da Nang and Ho Chi Minh City. Around 10 GB comfortably covers a fortnight for normal use.
- eSIM or a local Vietnamese SIM card?
- For a normal trip the eSIM is simpler: no kiosk, no passport registration, no queue after a long flight. A local Viettel or Vinaphone SIM makes sense for long stays or if you need a Vietnamese number for domestic services — but you will be showing your passport and having the SIM registered to you.
- Does it include a Vietnamese phone number?
- No. These profiles are data-only, so there is no Vietnamese number for calls or SMS. Grab, WhatsApp, Zalo and Messenger all work over data, but you will not receive an SMS code on this line, and a few Vietnamese apps and services that verify a local number will refuse to register you.
Cities
Hanoi · Ho Chi Minh City · Da Nang
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