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Price checked on October 13, 2026

Ubigi eSIM for Vietnam: our review

  • Vietnamese networkVinaphone
  • Checked monthly
  • 4.1/5 · 48,542 · Trustpilot
  • 1 vietnam plans · from $12.90
  • Hotspot OK

Verdict

Ubigi, the travel brand of NTT's Transatel, sells a single Vietnam plan on its website: 10 GB for 30 days at 12.90 dollars, on Vinaphone, with a six-month activation window. It is simple and fairly priced, but the catalogue is thin unless you go through the app, the plan is Vinaphone-only, and the help desk works by contact form.

Some links on this page are affiliate links. We may earn a commission if you buy through them, at no extra cost to you. Rankings are not influenced by commissions.

Best for

  • A two-week city trip where 10 GB is the right size
  • Travellers who want a plan that does not start until first connection, with six months to use it
  • People who already use Ubigi's subscription in other countries

Look elsewhere if

  • You want a choice of sizes or an unlimited plan from the website
  • You are heading to the northern mountains: Vinaphone only, no Viettel
  • You expect live chat support

What works

  • 10 GB for 30 days at 12.90 dollars, in line with Airalo and Nomad
  • Smartstart activation at first connection, 180 days to activate, top-ups from the account
  • Hotspot allowed; 5G badge on the site

What to watch

  • One Vietnam plan on the website; other sizes, if any, only in the app
  • Vinaphone only; no 3G fallback
  • Trustpilot 4.1 with complaints about no connection on arrival and manual APN settings
  • Refunds only if no data was used; no refund on top-ups once started

Ubigi in Vietnam: the facts

Vietnamese network
Vinaphone
https://cellulardata.ubigi.com/rates-and-coverage/vietnam-data-plans/vietnam-10gb-30-days/
5G
Not stated
Hotspot
Yes
Phone number
data only
Plan starts
at first connection in Vietnam
Must activate within: 180 days
Top-up
Yes
Refunds
Preloaded eSIM bought on the website: refund only if none of the data has been used (or device is locked/incompatible). Top-ups bought in the account: no refund once service started, except proven technical issues on Ubigi's side. Request via help-center form with receipt within 14 business days; refund processed within 10 business days to original payment method.
Support
email
Trustpilot
4.1/5
48,542 · October 13, 2026
Type
International eSIM
Last checked
October 13, 2026
Ubigi is in our "checked monthly" group: prices, network, caps and promo codes are re-verified every month.

Ubigi's Vietnam offer is a single, sensible plan: 10 GB over 30 days for 12.90 dollars, which covers maps, messaging and photos for most two-week trips. It activates when you first connect in Vietnam and stays valid for six months before that, so buying early is safe.

The network is Vinaphone (VNPT), excellent in cities and along the coast, thinner than Viettel in the mountains. Ubigi's site shows a 5G badge but does not confirm 5G for Vietnam specifically. The recurring complaint on Trustpilot is an eSIM that does not connect on landing until the APN or the network is set by hand: our installation steps below cover this.

If 10 GB is what you need, Ubigi is a fine pick from a large operator. If you want more choice, an unlimited plan or Viettel coverage, look at the comparison table.

Ubigi Vietnam plans and prices

PlanDataValidityNetworkPriceper GB
Vietnam 10 GB 30 days10 GB30 daysVinaphone$12.90$1.29

Read on Ubigi's website on October 13, 2026. Prices in US dollars, before any promo code.

See at Ubigi

Ubigi promo code

Ubigi has no public promo code at the moment. Discounts, when they exist, apply automatically through the link below; we remove codes as soon as they stop working.

What Ubigi customers complain about

Trustpilot score 4.1/5 on 48,542 reviews (read on October 13, 2026). The recurring themes:

  • eSIM not connecting or slow activation on arrival
  • dropped connections and spotty coverage
  • manual APN/network settings needed
  • slow email support

Trustpilot →

Installing a Ubigi eSIM for Vietnam

  1. Check that your phone is eSIM-compatible and carrier-unlocked (Settings → About → "Digital SIM" or "EID" on Android, "Add eSIM" on iPhone).
  2. Buy the plan on Ubigi's site or app and install it at home on Wi-Fi: scan the QR code or let the app add it.
  3. Label the line "Vietnam", keep your home SIM for calls and SMS, and turn on data roaming for the eSIM line only.
  4. Leave mobile data on your home line off before take-off. On landing, select the Ubigi line for data: the plan starts counting at first connection.
  5. No signal after a few minutes? Toggle airplane mode, then pick the network manually in the cellular settings.

Alternatives to Ubigi for Vietnam

For the same trip, here is what the other brands charge: (10 days, 5 GB)

Ubigi in Vietnam: questions

Which network does Ubigi use in Vietnam?

Ubigi connects to Vinaphone. That choice matters more than the brand. Viettel has the widest coverage, especially in the northern mountains, the central highlands and the islands; Vinaphone and MobiFone are excellent in cities and on the coast; Vietnamobile is weak outside the big cities.

Is Ubigi's unlimited plan really unlimited?

Ubigi does not sell an unlimited plan for Vietnam: all its plans have a fixed data allowance.

Do I get a Vietnamese phone number with Ubigi?

No. Ubigi is data-only: no Vietnamese number, so no Vietnamese SMS. Calls go through WhatsApp or your home line in roaming.

Can I share Ubigi's connection as a hotspot?

Yes

When does the Ubigi plan start?

The plan starts at first connection in Vietnam. Install it at home, keep data roaming off on that line until you land.

Some links on this page are affiliate links. We may earn a commission if you buy through them, at no extra cost to you. Rankings are not influenced by commissions.