HelloRoam offers a London eSIM from €2.45. HelloRoam covers 185+ countries through 212+ partner networks. Your eSIM taps into local 5G networks the moment you land, with no roaming charges. Scan the QR code and you're online in under two minutes on any eSIM-compatible phone. Your Three Ireland, Vodafone IE or Eir number keeps running on dual SIM while your eSIM handles the data.
- local networks
212+- network type
5G- to activate
2 minutes
Last updated
London data plans from Zone 1 to the suburbs
Cheap eSIM for London, starting from €2.45. Local 5G data on local partner networks in London. Works on any carrier-unlocked, eSIM-compatible phone. London is Ireland's most-visited city, pulling millions of Irish visitors, students, and diaspora travellers every year to the West End, markets, museums, and every neighbourhood in between. An eSIM in London from HelloRoam starts at €2.45 and covers the city and greater London area on local UK networks. Activate by QR code at home before travelling from Ireland. No roaming charges, no contract. GDPR-compliant checkout, 180-day refund guarantee on unactivated eSIMs.
London eSIM with 5G coverage
HelloRoam offers eSIM plans for London starting from €2.45. Connect on 5G through EE and Three UK. Your Irish carrier's international roaming charges apply outside the EU. With a HelloRoam eSIM, you pay one set price for your data up front. Activate before your flight from Dublin Airport and connect on arrival at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY).
- Plans start at €2.45 with 5G speeds
- Coverage from EE and 1+ other operators
- Instant activation in under 2 minutes
- 180-day refund on unactivated eSIMs
- London coverage across major cities
- Network
- 5G
- Plans From
- €2.45
- Activation
- Under 2 min
- Refund
- 180 days if unactivated
How to Set Up an eSIM in London
Follow these steps to get started with an eSIM on your iPhone or Android.
Set up an eSIM on your iPhone with the HelloRoam app
Set up an eSIM on your Android with the HelloRoam app
- 1
Choose your plan and checkout
Pick a data plan for your destination and complete checkout online.
2Scan the QR code
Scan the QR code to install your eSIM instantly.
- 3
Activate in minutes: ready on arrival
Your eSIM installs instantly and activates the moment you land.
4Manage everything from the app
Track usage, top up data, and manage all your eSIMs in one place.
Trip changed? No bother, we have got you sorted.
Travel plans shift, and that's grand. HelloRoam refunds unactivated, unscanned eSIMs in full for up to 180 days after purchase, no drama.
Learn more about our refund policyHelloRoam London eSIM vs a travel SIM card or Three Ireland, Vodafone IE and Eir roaming
Comparing an eSIM with a travel SIM card for London? Outside the EU, Eir, Vodafone IE and Three Ireland roaming charges add up day by day. Skip the airport SIM counter at Dublin Airport and get a prepaid eSIM for London from €2.45, with instant QR activation and a 180-day refund on unactivated eSIMs.
Why Travellers from Ireland Use HelloRoam e-sim for London
24/7 live chat support
Stuck at 2am in Bangkok, or sorting things out the night before you fly from Dublin? HelloRoam support is available 24/7. Message us by live chat, WhatsApp or email at help@helloroam.com. Data problems don't wait for office hours, and neither do we.
Best eSIM for London
Get data at 5G speeds the moment you land in London. On trips outside the EU, skip your home carrier's roaming fees. HelloRoam connects you to local carrier networks in minutes, whether you're on holiday or working. Your connection is ready before you clear customs.
Dual SIM ready
Keep your Three Ireland, Vodafone IE, or Eir mobile number active for calls and texts. HelloRoam runs travel data on a second eSIM line on any dual SIM compatible phone. No need to choose between your Irish number and your data abroad. Running two lines on one handset means family back home can always reach you on your usual number, while your data runs on a local network at one prepaid HelloRoam price.
212+ partner networks worldwide
HelloRoam connects to 212+ carrier networks across 185+ countries. Your phone joins a partner 5G network automatically, from European cities to long-haul destinations in Asia and the Americas. Speeds depend on the local network.
Usage alerts before you run out
HelloRoam emails you as your data runs low on a fixed plan, so you can top up or buy a new plan in time. Where your plan allows it, top up from the app without reinstalling your eSIM or visiting a shop. Adding a fresh prepaid data package takes under a minute from your account dashboard.
Local network speeds in London
HelloRoam eSIM connects to local 5G networks in London for one prepaid HelloRoam price. Use maps, video calls and streaming without roaming charges from Eir or Vodafone IE on trips outside the EU. Speeds depend on the local network and your location. You pay HelloRoam's own price, shown before you buy, not the local carrier's tariff or your Irish carrier's international add-ons.
Global and regional plans
Heading to more than one country? HelloRoam regional plans cover many countries in Europe, Asia, the Americas and more, in one eSIM purchase. One multi-country data plan means no SIM swapping at borders and a single account managing all your international mobile data in one place.
Hotspot and data sharing in London
Share your London eSIM data with a laptop or tablet using your phone's hotspot. No extra fees, no setup. Works on all eSIM compatible phones. Tethering and mobile hotspot support means the whole group stays online without buying separate data plans for every device.
Best eSIM Prices for London
HelloRoam, the best eSIM London. Compare plans and find the right data for your trip.
| Number of days | Price |
|---|---|
| 1 day | €2.59 |
| 3 days | €7.39 |
| 7 days | €15.97 |
| 15 days | €31.11 |
| 22 days | €42.21 |
| 30 days | €52.90 |
HelloRoam vs Other eSIM Providers for London
See how HelloRoam compares with Airalo, Holafly, Nomad, Saily and Ubigi for your London trip. The table covers a 180-day refund on unactivated eSIMs, data overage charges and instant QR code delivery.
| Feature comparison | HelloRoam | Airalo | Holafly | Nomad | Saily | Ubigi |
|---|---|---|---|---|---|---|
| 180-day refund (unactivated eSIMs) |  Feature available |  Feature not available |  Feature available | Feature not available | Feature not available | Feature not available |
| No data overage charges | Feature available | Feature available | Feature available | Feature available | Feature available | Feature available |
| Instant QR code delivery | Feature available | Feature available | Feature available | Feature available | Feature available | Feature available |
What Is an e SIM? How eSIM Works in London
An eSIM is a digital SIM built directly into your phone: no plastic chip, no SIM tray. Scan a QR code to activate in under 2 minutes on any eSIM compatible iPhone or Android. It works as a prepaid data plan for London travel with no airport SIM counter, no physical SIM card, and no carrier contract. Sort everything at home before you head to Dublin Airport, Shannon, Cork, or Knock and you are ready to go the moment you land. guide
Mobile connectivity guide for London
London has 5G mobile coverage across its main tourist areas. EE and Vodafone UK are the core networks. Your Irish carrier's international roaming charges apply outside the EU. With a HelloRoam eSIM, you pay one set price for your data up front.
A HelloRoam eSIM means you arrive at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY) already connected without hunting for a SIM card. Plans start at €2.45.
- HelloRoam connects to EE 5G, Three 4G in London
- 5G coverage across London's main areas
- Connect on EE and Three UK
- Activate before your flight from Dublin
eSIM Travel Tips for London
Sort your eSIM before you leave Dublin
Buy your HelloRoam eSIM for London at home, scan the QR code over Wi-Fi, and switch on data when you land at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY). You step off the plane already connected on local 5G. No queuing at airport telecom shops.
Keep your Irish number live
On a dual-SIM phone, leave your Three Ireland, Vodafone Ireland, Eir, or GoMo SIM active for calls and texts. Use HelloRoam for data in London. People back home can still ring your Irish number without international charges.
Download offline maps first
Save Google Maps or Maps.me for London offline before you fly. Offline navigation uses no data and keeps working even where signal is patchy. It's a handy backup when you arrive and need directions quickly.
Watch your data usage
The HelloRoam app shows how much data you've used, though it can be up to 3 hours behind. On a fixed-data plan, HelloRoam also emails you when your data runs low, so there are no nasty surprises. Top up inside the app if you need more data in London, no reinstall needed.
Save emergency numbers offline
The emergency number in most countries is 112. In London it is worth checking the local number too. Save these offline before you travel. Your phone can call an emergency number on any available mobile network, even with no data left on your plan. The HelloRoam eSIM itself is for data only.
Mobile networks in London: what Irish visitors need to know
HelloRoam connects on EE and Three in London. These are the leading 5G networks with strong coverage in Central London, Shoreditch, and Canary Wharf and main tourist areas. Coverage and speed on your eSIM depend on the local network in each area. Plans start at €2.45 and give you instant 5G data on arrival.
- EE
- 5G
- Three
- 4G
HelloRoam eSIM vs Irish carrier roaming in London
Your connectivity options for a trip to London from Ireland. Compare HelloRoam eSIM plans against buying a local SIM card or using your Irish carrier's roaming add-on.
| Category | HelloRoam eSIM Recommended | Local London SIM card | Roaming with your carrier |
|---|---|---|---|
| Typical cost | From €2.45 total | — | — |
| Details | Plans from €2.45. Buy before your flight from Dublin Airport, activate at home over Wi-Fi, and arrive at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY) already on local 5G data. No store visit, no ID check, and no wasted time after a long flight. | Available at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY) but requires setup time after your flight. Tourist SIMs may need passport registration and in-store activation. Unused data is usually forfeited when your trip ends. | Outside the EU, roaming on an Irish plan usually costs extra, often as a daily add-on that builds up over a longer trip. Before a week in London, check whether your Irish plan's roaming allowance covers the UK and how much data it gives you. HelloRoam eSIM plans start from €2.45, and you can choose more data or a longer validity for a longer stay. |
Prices approximate as of . Actual savings vary.
Best time to visit London from Ireland
London is a popular destination for Irish holidaymakers. Dublin Airport has regular direct or connecting flights year-round. The best time to visit depends on your preferences for weather, crowds, and value.
Top Attractions in London
Big Ben
Big Ben's clock tower at the Palace of Westminster is one of London's top landmarks. Use HelloRoam eSIM to stay connected.
Stand on Westminster Bridge for the classic Big Ben photo angle.
Buckingham Palace
Buckingham Palace is the official London residence of the British monarch since 1837. Use HelloRoam eSIM to stay connected.
Arrive by 11 AM for a good spot to watch the Changing of the Guard.
London Eye
The London Eye is a 135-meter observation wheel on the Thames South Bank. Use HelloRoam eSIM to stay connected.
Book a sunset pod for the best views as city lights start to glow.
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Reviews
What Our Customers Say
Real reviews from Trustpilot and the App Store, quoted as written.
40k+ travellers have used HelloRoam
Cat
On a trip to Europe, my hotel Wi-Fi was so slow and outside Wi-Fi was unreliable. I couldn’t take it anymore so I got helloroam for a few days. It was tricky to set up correctly because of the primary settings (with my original number). But I reached out to their customer service via WhatsApp. Super responsive and helpful, with specific and clear steps to troubleshoot. Appreciate having 4G roaming instead of being stuck with in and out Wi-Fi during my trip!!
Rated 5 out of 5 by this reviewer
Very good experience! The eSIM was easy to set up and worked great in London. It was much cheaper than it would have been to use my own operator there.
Ilona
Rated 5 out of 5 by this reviewer
metulker
Hard to set up but help was good
Rated 5 out of 5 by this reviewer
Reuben
Really happy with HelloRoam. Everything worked as expected, from messaging and Google Maps through to streaming without any issues. Easy to use, reliable and affordable. Would happily use them again when travelling.
Rated 5 out of 5 by this reviewer
Angeline
Reliable connection. Reasonable pricing.
Rated 4 out of 5 by this reviewer
Last updated
Your London eSIM Questions Answered
How do Irish visitors avoid roaming charges in London on a city break from Dublin?
An eSIM London plan from HelloRoam gives you local UK coverage across all London Zones from €2.45. HelloRoam delivers a QR code to your email, activated at home before you fly or travel from Ireland. No roaming charges from your Irish provider, no physical SIM card, and a 180-day refund guarantee on unactivated eSIMs included.
What does an e-sim London plan cover for an Irish visit including Heathrow and the West End?
A HelloRoam e SIM London plan covers central and greater London on UK networks from €2.45, including Heathrow, Gatwick, and all city zones. Activate at home before you travel from Ireland so data is live on arrival. No physical SIM, no roaming fees, and a 180-day refund guarantee on unactivated eSIMs on every prepaid order.
What is the best eSIM for London from Ireland?
HelloRoam is a strong choice for travellers from Ireland visiting London. Plans start from €2.45 and connect through our worldwide network of 212+ carriers, giving you local 5G speeds in London. Activate via QR code in under two minutes, keep your Three Ireland, Vodafone IE or Eir number on dual SIM, and get a 180-day refund window on unactivated eSIMs. No carrier contract needed.
How much does an eSIM for London cost from Ireland?
A London eSIM starts from €2.45. Fixed data plan sizes vary by country, and this page lists every size on sale. Unlimited daily plans, where offered, charge by the day. All plans include local 5G access with no overage charges and no carrier contract. Outside the EU, that compares well with what Eir or Vodafone IE charge for roaming.
Which networks does a London eSIM connect to?
eSIM in London connects to local partner networks on 5G. Your phone joins a local partner network automatically on arrival, with no manual carrier selection needed. Coverage and speeds depend on the local network, so they vary from place to place.
How do I get an eSIM for London before flying from Ireland?
Getting your eSIM for London takes three steps. First, choose your plan at helloroam.com and pay in the currency you choose. Second, scan the QR code from your confirmation email in Settings under Mobile Data, then Add eSIM. Third, your eSIM installs in under two minutes and activates when you land. Do everything at home before you head to Dublin Airport, Shannon, Cork or Knock. No shop visit, no physical SIM swap, no queue.
Does iPhone support eSIM for London travel from Ireland?
Yes. iPhone XS and all newer models support your eSIM for London. Go to Settings, tap Mobile Data, then Add eSIM, and scan the QR code from your HelloRoam email. Your Irish number stays active on your main SIM through dual SIM while HelloRoam handles all travel data on the eSIM line. Some iPhones, like iPhone 14 and later models sold in the US, are eSIM-only with no SIM tray at all.
What is the best eSIM for London for Irish travellers?
HelloRoam is a solid eSIM choice for London, connecting on EE and Three UK 5G. Buy your plan before your flight from Dublin Airport, scan the QR code at home, and land at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY) already connected. Plans start at €2.45.
Does a HelloRoam eSIM work in London?
HelloRoam eSIM plans work in London on EE 5G and Three 4G. Activate at home before your flight from Dublin by scanning the QR code in your phone settings. Enable data roaming when you land and you'll be online within seconds of arrival.
Do Irish travellers need a local SIM in London?
Your Irish carrier's international roaming charges apply outside the EU. With a HelloRoam eSIM, you pay one set price for your data up front. A HelloRoam eSIM from €2.45 gives you local 5G data without daily add-on charges or trips to an airport SIM shop. Sort everything from Dublin before you fly.
Which networks does HelloRoam use in London?
HelloRoam eSIM for London connects on EE and Three. Your phone picks the strongest available 5G signal as you travel around London. Coverage is reliable in all main tourist areas and near Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY). No manual network selection is needed.
How much does an eSIM for London cost?
HelloRoam eSIM plans for London start at €2.45. Larger plans with more data and longer validity are available for bigger trips or heavy data users. All plans include 5G data and there are no daily fees or surprise charges. Compare plans at helloroam.com.
How much data do I need for a week in London?
A week in London using maps, messaging, social media, and light browsing typically uses 3 to 6 GB. Streaming video in the evenings or video-calling home to Ireland adds more. A 10 GB plan gives you a comfortable buffer for a busy week. HelloRoam offers plans in multiple sizes.
How long does the London eSIM last?
HelloRoam eSIM plans for London run from 12 to 30 days depending on your data size. Pick the plan that covers your full stay from Dublin to your return flight. Scan the QR code before you fly and connect from the moment you land at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY).
Is 5G available in London?
London has 5G coverage through EE and Vodafone UK. Your HelloRoam eSIM connects to a local partner network, so coverage and speed depend on that network. Buy your plan before your flight from Dublin Airport and connect on landing at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY) without any manual setup.
