Best eSIM for the UK for Australians: What to Know Before You Fly
UK trips by Australians tend to be longer — a week in London, a fortnight in the countryside, or a stop on a Europe itinerary. Here's how to choose the right UK eSIM.
Published 27 September 2026 · Updated 27 September 2026 · By Roamza
For a UK trip, a Roamza unlimited daily eSIM gives you data for the Tube, navigation and messaging from the moment you land. Current UK plans offer 1GB of high-speed data per day, then unlimited at up to 512kbps. A UK eSIM does not work elsewhere in Europe unless the plan's coverage explicitly includes those countries.
Roamza sells travel eSIMs for the UK, and this guide helps you choose the right one. UK trips by Australians tend to be longer than Southeast Asia trips — a week in London, a fortnight exploring the countryside, or a stop on a longer Europe itinerary. That changes what you need from an eSIM.
Arriving in London
Whether you land at Heathrow, Gatwick or Stansted, the moment you clear customs you'll want data for the Tube map, train bookings, ride-share and messaging. A travel eSIM installed before you fly means you're connected the moment you step out of the terminal — no hunting for a SIM counter after a 24-hour flight.
Longer stays change the calculation
A week in London uses data differently than a 3-day Bangkok stopover. You'll use the Tube app (Citymapper or TfL Go) daily, search for pubs and restaurants, navigate on foot, and probably stream in the evening. Over a fortnight, you might add day trips to Bath, Oxford or the Cotswolds — all of which need navigation.
Roamza's current UK plans are unlimited daily eSIMs, available in 1-day, 3-day and 5-day durations starting from $5.00. Each day you get 1GB of high-speed data, followed by unlimited data at up to 512kbps. For a week or longer, you can combine multiple plans.
You can see the current UK eSIM plans here.
Getting around: public transport and navigation
London's public transport is excellent, and the apps that make it work — Citymapper, TfL Go, Trainline — all need data. Active navigation uses roughly 120–150MB per hour. Over a day of exploring, you might use 300–500MB just on transport apps and maps.
Google Maps walking navigation in London's narrow streets is surprisingly data-hungry because the map redraws frequently. If you're walking for an hour or more, expect 150–200MB for navigation alone.
UK-only vs wider Europe travel
If your trip is UK-only, a UK eSIM is all you need. But many Australians combine the UK with a few days in Paris, Amsterdam or Rome. A UK eSIM connects to UK networks (EE, O2, Three) — it does not work in France, the Netherlands or Italy unless the plan's coverage explicitly includes those countries.
Check the UK plans page for current coverage details. If you're travelling beyond the UK, you may need a separate eSIM for each country or a regional Europe plan.
Network coverage in the UK
Roamza's UK eSIMs connect to major UK networks including EE, O2 and Three. Coverage is strong in London and other major cities, and along motorways and rail routes. Coverage can be thinner in rural areas — the Scottish Highlands, parts of Wales and rural Cornwall — where signal drops are common.
The plans support 4G networks. Actual speeds depend on your location, the local network, and your device.
Hotspot and work use
If you're working remotely from the UK — a few days in a London cafe, or a week in a Cotswolds cottage — you may want to use hotspot for a laptop. Roamza's UK plans support hotspot. Data used via hotspot counts against your daily 1GB high-speed allowance, then continues at the reduced speed.
For video calls, 1GB per day may run out partway through a long meeting. Use Wi-Fi where available for work calls, and save the eSIM for maps, messaging and browsing.
Setting up before you fly
Install your eSIM at home over Wi-Fi — it takes under two minutes. The eSIM sits inactive until you land and switch it on. For step-by-step instructions, see the installation guide.
On a compatible dual-SIM phone, you can keep your Australian SIM installed for calls and SMS while using the eSIM for data. Check the compatibility checker to confirm your phone supports dual SIM.
Your Australian carrier may offer international roaming, but it can be expensive — check your carrier's current roaming rates before travelling. See how it works for more on travel eSIMs vs roaming.
Plan options and prices were current when this guide was updated. Check the UK plans page for the latest options.
Heading to the UK?
Get your UK eSIM sorted before leaving Australia and use mobile data while keeping your Australian SIM installed on compatible devices.
VIEW UK eSIM PLANSFrequently asked questions
Not unless the plan's coverage explicitly includes those countries. Roamza's UK eSIMs connect to UK networks. If you're travelling beyond the UK, check the UK plans page for coverage details or consider a separate eSIM for each country.
Coverage is strong in major cities and along motorways and rail routes. It can be thinner in rural areas like the Scottish Highlands, parts of Wales and rural Cornwall.
Yes. Roamza's UK plans support hotspot. Data used via hotspot counts against your daily 1GB high-speed allowance, then continues at the reduced speed. Use Wi-Fi for long video calls.
Citymapper and TfL Go use data for live updates and route planning — roughly 50–100MB per day of regular use. Active navigation uses more, around 120–150MB per hour.
For a 5-day trip, the 5-day plan covers you. For a week or longer, combine a 5-day plan with a 3-day or 1-day plan to cover the full duration. Each day gives you 1GB of high-speed data.