App Store
HelloRoam's London eSIM starts from €2.32 and taps into 199+ carrier networks across 185+ countries. 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.
210+
local networks
5G
5G support
2 minutes
to activate
![London [[networkType]] network speeds](/icons/figma-2026/stats-speedometer.svg){kind=icon}
Last updated
London data plans from Zone 1 to the suburbs
Cheap eSIM for London, starting from €2.32. Local 4G/5G data on top carrier networks in London. Works on all eSIM compatible phones. 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 €2.32 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 fast 5G coverage
HelloRoam offers eSIM plans for London starting from €2.32. Connect on 5G through EE and Vodafone UK. Your Irish carrier's international roaming charges apply outside the EU. A HelloRoam eSIM costs far less than daily roaming add-ons from Eir, Three Ireland, or Vodafone Ireland. Activate before your flight from Dublin Airport and connect on arrival at Heathrow Airport (LHR), Gatwick (LGW), or London City (LCY).
- Plans start at €2.32 with 5G speeds
- Coverage from O2 and 2+ other operators
- Instant activation in under 2 minutes
- 180-day money-back guarantee
- London coverage across major cities
- Network
- 5G
- Plans From
- €2.32
- Activation
- Under 2 min
- Guarantee
- 180 days
How to Set Up an eSIM in London
Pick a data plan for your destination and complete checkout online.
Scan the QR code to install your eSIM instantly.
Your eSIM installs instantly and activates the moment you land.
Track usage, top up data, and manage all your eSIMs in one place.
Pick a data plan for your destination and complete checkout online.
Scan the QR code to install your eSIM instantly.
Your eSIM installs instantly and activates the moment you land.
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 Three Ireland, Vodafone IE and Eir roaming
Comparing eSIM vs a travel SIM card for London? Eir charges up to €5.99/day for Worldwide Roaming, Vodafone IE up to €6.99/day for Global Roaming, and Three Ireland applies daily charges outside its Go Roam zone. Skip the airport SIM counter at Dublin Terminal 1 and get a prepaid eSIM from €2.32 with instant QR activation and a 180-day refund on unactivated eSIMs.
| Feature |  | Irish carrier roaming add-on | Limited data eSIM |
|---|---|---|---|
| 180-day refund policy |  |  | |
| 24/7 live chat support | |  | |
| €0 activation fees | | | |
| Free hotspot and data sharing | | | |
| No data overage charges | | | |
| Instant QR code delivery | | | |
| Premium London carrier networks | | | |
Why Travellers from Ireland Use HelloRoam e-sim for London
HelloRoam vs Other eSIM Providers for London
eSIM provider reviews from Irish travellers consistently highlight the 180-day refund policy, zero activation fees, and 24/7 live support. See how HelloRoam compares to Airalo, Holafly, Saily, and other eSIM providers on the things that matter most for your London holiday.
| Feature comparison | | Airalo | Holafly | Nomad | Saily | Ubigi |
|---|---|---|---|---|---|---|
| 180-day refund policy | | | | | | |
| 24/7 live chat support | | | | | | |
| €0 activation fees | | | | | | |
| Free hotspot and data sharing | | | | | | |
| No data overage charges | | | | | | |
| Instant QR code delivery | | | | | | |
| Premium London carrier networks | | | | | | |
| Own branded carrier identity (SPN) | | | | | | |
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. A HelloRoam eSIM costs far less than daily roaming add-ons from Eir, Three Ireland, or Vodafone Ireland.
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 €2.32.
- HelloRoam connects to O2 5G, T-Mobile UK 5G, Three 4G in London
- 5G coverage across London's main areas
- Connect on EE and Vodafone 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 your balance in real time. You get alerts at 80% and 95% usage 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. Emergency calls work on any available network regardless of your HelloRoam data balance.
Mobile networks in London: what Irish visitors need to know
HelloRoam connects on EE and Vodafone UK in London. These are the leading 5G networks with strong coverage in Central London, Shoreditch, and Canary Wharf and main tourist areas. Your eSIM picks the best available signal automatically. Plans start at €2.32 and give you instant 5G data on arrival.
- O2
- 5G
- T-Mobile UK
- 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.
RecommendedFrom €2.32 total
Plans from €2.32. 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.
€4.32–€21.61 total
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.
€4.32–€12.96/day
Irish carrier international roaming outside the EU can cost €5 to €15 per day. A week in London on roaming could add €35 to €105 in data charges alone. HelloRoam eSIM starts at €2.32 for your whole trip.
| Category | Recommended | Local London SIM card | Eir, Three Ireland, Vodafone Ireland, or GoMo roaming |
|---|---|---|---|
| Typical cost | From €2.32 total | €4.32–€21.61 total | €4.32–€12.96/day |
| Details | Plans from €2.32. 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. | Irish carrier international roaming outside the EU can cost €5 to €15 per day. A week in London on roaming could add €35 to €105 in data charges alone. HelloRoam eSIM starts at €2.32 for your whole trip. |
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.
Showing slide 1 of 3
Prices verified:
Your London eSIM Questions Answered
An eSIM London plan from HelloRoam gives you local UK coverage across all London Zones from €2.32. 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.
A HelloRoam e SIM London plan covers central and greater London on UK networks from €2.32, 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.
HelloRoam is a top-rated eSIM for travellers from Ireland visiting London. Plans start from €2.32 and connect through our worldwide network of 199+ carriers, giving you local 4G/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 enjoy a 180-day refund window on unactivated eSIMs. No daily roaming charge and no carrier contract.
A London eSIM starts from €2.32. Fixed data plans run from 1GB to 20GB. Unlimited daily plans suit longer trips. All plans include local 4G/5G access with no overage charges and no carrier contract. That is far less than what Eir charges for non-EU Worldwide Roaming or Vodafone IE for Global Roaming.
eSIM in London connects to local 4G/5G networks. Your phone picks the strongest available signal automatically on arrival, no manual carrier selection needed. Coverage spans major cities, airports, main roads, and most rural areas. You get the same local network speeds as residents of London, not the premium daily rates Eir or Vodafone IE charge for international roaming.
Getting your eSIM for London takes three steps. First, choose your plan at helloroam.com and pay in EUR. Second, scan the QR code from your confirmation email in Settings under Mobile Data, then Add eSIM. Third, your e-sim 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.
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. iPhone 14 and later are eSIM-only with no SIM tray needed.
HelloRoam is a solid eSIM choice for London, connecting on EE and Vodafone 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 €2.32.
HelloRoam eSIM plans work in London on EE and Vodafone UK 5G. 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.
Your Irish carrier's international roaming charges apply outside the EU. A HelloRoam eSIM costs far less than daily roaming add-ons from Eir, Three Ireland, or Vodafone Ireland. A HelloRoam eSIM from €2.32 gives you local 5G data without daily add-on charges or trips to an airport SIM shop. Sort everything from Dublin before you fly.
HelloRoam eSIM for London connects on EE and Vodafone UK. 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.
HelloRoam eSIM plans for London start at €2.32. 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.
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.
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).
London has 5G coverage through EE and Vodafone UK. HelloRoam eSIM plans connect on the best available signal automatically. 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.
