eSIM London from €2.31

Name: eSIM London
Brand: HelloRoam

HelloRoam is a global eSIM provider offering instant mobile data in 185+ countries. Buy prepaid travel eSIM plans with no extra fees, no contracts, and instant activation on any eSIM-compatible device.

A London eSIM from HelloRoam starts at €2.31 across 204+ carrier networks in 185+ countries. Activate via QR code in under two minutes on any eSIM compatible phone. Your Three Ireland, Vodafone IE, or Eir number stays active on dual SIM.

194+
local networks
5G
5G support
2 minutes
to activate

Last updatedJune 2026

London data plans from Zone 1 to the suburbs

Cheap eSIM for London, starting from €2.31. Local 4G LTE and 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 €2.31 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.

London eSIM with fast 5G coverage

HelloRoam offers eSIM plans for London starting from $2.68. 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 €2.31 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: €2.31
Activation: Under 2 min
Guarantee: 180 days

Trip changed? No bother, we have got you sorted.

Plans change, and that is no bother at all. With HelloRoam, you can request a full refund for your eSIM within 180 days of purchase.

Learn more about our refund policy

HelloRoam 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 €2.31 with instant QR activation and a six-month money-back guarantee.

HelloRoam London eSIM vs Three Ireland, Vodafone IE and Eir roaming
Feature		Irish carrier roaming add-on	Limited data eSIM
180-day refund policy
24/7 live chat support
€0 activation fees
99.8% uptime guarantee
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
Feature comparison		Airalo	Holafly	Nomad	Saily	Ubigi
180-day refund policy
24/7 live chat support
€0 activation fees
99.8% uptime guarantee
No data overage charges
Instant QR code delivery
Premium London carrier networks
Own branded carrier identity (SPN)

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 $2.68.

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 $2.68 and give you instant 5G data on arrival.

O2: 5G
T-Mobile UK: 5G
Three: 4G

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.

Check Device Compatibility Data Usage Calculator

Prices verified: 5 June 2026

Your London eSIM Questions Answered

An eSIM London plan from HelloRoam gives you local UK coverage across all London Zones from €2.31. 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 included.

A HelloRoam e SIM London plan covers central and greater London on UK networks from €2.31, 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 every prepaid order.

HelloRoam is a top-rated eSIM for travellers from Ireland visiting London. Plans start from €2.31 and connect to 200+ carrier networks in London at local 4G LTE and 5G speeds. Activate via QR code in under two minutes, keep your Three Ireland, Vodafone IE, or Eir number on dual SIM, and enjoy a full refund window of up to six months. No daily roaming charge and no carrier contract.

A London eSIM starts from €2.31. Fixed data plans run from 1GB to 20GB. Unlimited daily plans suit longer trips. All plans include local 4G LTE and 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 LTE and 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 $2.68.

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 $2.68 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 $2.68. 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.

Number of days	Price
1 day	€2.31
3 days	€6.63
7 days	€15.47
15 days	€32.08
22 days	€44.92
30 days	€59.10

Category	Recommended	Local London SIM card	Eir, Three Ireland, Vodafone Ireland, or GoMo roaming
Typical cost	From €2.31 total	€4.31–€21.53 total	€4.31–€12.92/day
Details	Plans from $2.68. 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 $2.68 for your whole trip.

Number of days	Price
1 day	€2.31
3 days	€6.63
7 days	€15.47
15 days	€32.08
22 days	€44.92
30 days	€59.10

Category	Recommended	Local London SIM card	Eir, Three Ireland, Vodafone Ireland, or GoMo roaming
Typical cost	From €2.31 total	€4.31–€21.53 total	€4.31–€12.92/day
Details	Plans from $2.68. 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 $2.68 for your whole trip.

eSIM London

London data plans from Zone 1 to the suburbs

eSIM London

London data plans from Zone 1 to the suburbs

London eSIM with fast 5G coverage

Trip changed? No bother, we have got you sorted.

HelloRoam London eSIM vs Three Ireland, Vodafone IE and Eir roaming

Why Travellers from Ireland Use HelloRoam e-sim for London