Staying Connected in Vietnam: A Traveller's eSIM Guide

There is a particular kind of regret that sets in somewhere mid-flight: you never sorted your data. Now your options are your home network's roaming rates, a queue at an airport SIM kiosk, or hoping the hotel wifi reaches past the lobby. Vietnam rewards travellers who can summon a map, a translation or a ride in seconds, so it is worth solving connectivity before your plane leaves the ground.

Getting around: your phone does the negotiating

Vietnam's cities move on two wheels, and the easiest way for a visitor to join the flow is Grab, the ride-hailing app that covers both cars and motorbike taxis. It agrees the fare before you set off, shows the driver exactly where you are standing, and takes the language barrier out of the whole exchange. The catch is that none of it works without data, and the moment you need it most is usually the moment you have none: outside the terminal with your bags, or on a dark street corner after dinner.

For longer distances, trains and sleeper buses are mostly booked through apps and websites rather than station windows, with confirmations arriving by email or QR code. Screenshot everything in advance, but keep a connection handy for the day a bus is cancelled and you need to rebook from the roadside.

One habit worth forming early: download offline maps for each region before you leave the city. Rural navigation is far more relaxed when the blue dot keeps moving even where the signal does not.

Paying: cash in hand, banking app in pocket

Vietnam runs on a blend of cash and QR codes. Markets and street food stalls remain firmly cash territory, while cafes and shops increasingly settle up by bank transfer QR. As a visitor you will lean on cash and cards, and data earns its keep in everything around the money: checking your banking app after an ATM withdrawal, catching a card notification the moment it lands, or converting a price before you agree to it. The dong's long strings of zeros catch almost everyone out once, and a live exchange rate is cheap insurance.

Where you will actually want data

Three situations come up again and again. The first is translation. English gets you a long way in tourist areas, but menus, homestay hosts and pharmacy visits all go more smoothly with a translation app, and those work best with a connection.

The second is the countryside. The karst valleys around Ninh Binh, the terraces above Sapa and the long mountain roads of the north are exactly where hotel wifi thins out, and where mobile data becomes your only line for maps, bookings and checking in with home.

The third is transit days. Sleeper trains and overnight buses are a joy, but plans change, and being able to message your next host, shift a booking or stream something while the scenery rolls past makes long journeys far easier.

Mobile data in Vietnam with Keep On Roaming

Keep On Roaming connects to two networks in Vietnam, Mobifone and Vietnamobile, with 2G, 3G and 4G support.

Roam Like Home® plans are built to be sorted before you fly. You install the eSIM via QR code before you travel, and it activates when you arrive and connect. Plans are data-only, so your existing SIM, number, calls and texts keep working alongside. And when your allowance runs low, you can top up the same eSIM with more data from your account dashboard, with no new eSIM to install.

How much data do you need?

Vietnam plans run from single-day unlimited passes to large 30-day allowances, so match the plan to your travel style rather than defaulting to the biggest number.

• Light use. If your phone handles messages, maps and the occasional search, 1 GB over 7 days (£6.50) covers a one-week trip, and 3 GB over 30 days (£10.00) suits a slower month.
• A typical fortnight. 2 GB over 15 days costs £8.50. If you would rather navigate, upload and video call without watching a meter, unlimited data for 15 days is £24.50.
• Heavier use. 10 GB over 30 days (£15.00) or 20 GB over 30 days (£18.00) gives comfortable headroom for photo backups and the odd hotspot session.
• Working on the road. 50 GB over 30 days (£32.00), 100 GB over 30 days (£56.00) or unlimited data for 30 days (£47.50) gives you the allowance for video calls and laptop tethering.
• Short stays and stopovers. Unlimited passes run for 1 day (£8.50), 3 days (£12.50), 5 days (£14.50), 7 days (£15.50) or 10 days (£17.00).

Because top-ups go onto the eSIM you already have, starting small is low risk. Buy what you expect to use, then add more from the dashboard if Vietnam keeps you longer than planned. It usually does.

Ready to land connected? Browse the full range of Vietnam plans, install your eSIM before you fly, and make the only airport queue you join the one for a banh mi.