United Kingdom · roaming cost calculator
United Kingdom Roaming Price Audit: $84 on AT&T, $28.49 on an eSIM
HelloRoam is the top pick for the United Kingdom: its 7-day unlimited plan costs $18.48, at full speed for the first 2 GB a day, against $84 for a week on AT&T's $12-a-day pass, a $65 gap, and Nomad is next cheapest at $25. HelloRoam refunds an unactivated eSIM for 180 days. Airalo covers 200+ destinations to HelloRoam's 185. HelloRoam's price is from its catalogue of 29 Oct 2026, rivals' from the 30 Oct 2026 price check; AT&T's rate was checked June 2026.
United Kingdom pricing here is quoted in dollars throughout. HelloRoam accepts 31 checkout currencies, and a bank takes 2 to 4 percent to convert a dollar charge that is not paid in one.
United Kingdom eSIM market: plan tiers and pricing
For a short trip to United Kingdom, HelloRoam's smallest fixed plan is $2.84 for 1 GB over 7 days, on a local network. One day of AT&T roaming costs $12.
Get eSIMHolafly delivers the United Kingdom eSIM QR code within minutes of payment. The plan activates on a local 5G network on arrival — no SIM swap, no roaming toggle.
Get eSIMEE covers cities, transport hubs, and major tourist areas in United Kingdom. Nomad sells into that market at $2.30/GB — remote rural coverage depends on local network infrastructure, not Nomad's.
Get eSIMEE covers major cities, motorways, and rail corridors in United Kingdom. Airalo sells into that market at $2.40/GB; rural dead zones affect both the eSIM and AT&T roaming equally.
Get eSIMUnited Kingdom travelers on Saily get 5G data plus NordVPN-grade security at $2.60/GB. Support is email-only, with no live chat; a 30-day refund covers unused plans.
Get eSIMCompare providers: Airalo vs Holafly · Airalo vs Saily · Airalo vs Nomad · Airalo vs HelloRoam · Holafly vs Saily · Holafly vs Nomad · Holafly vs HelloRoam · Saily vs Nomad · Saily vs HelloRoam · Nomad vs HelloRoam
The full picture
Carrier-by-carrier roaming rates, United Kingdom
Every major carrier's published United Kingdom rate, side by side, with the eSIM winner highlighted.
| Carrier | Plan type | Daily | 7-day | Speed | Data limit |
|---|---|---|---|---|---|
| AT&T | International Day Pass | $12.00source | $84.00 | LTE | Plan data |
| Verizon | TravelPass | $12.00source | $84.00 | LTE | Plan data |
| eSIM · HelloRoam | 20GB data plan | — | $28.49 | 5G | 20GB |
Compare all carrier roaming plans to see how AT&T, Verizon, T-Mobile, Vodafone, and EE stack up against eSIM providers.
Pay-per-use cost audit
What AT&T charges per activity in United Kingdom — no day pass
AT&T's international pay-per-use rate is $2.05/MB in United Kingdom. Mixed phone use — maps, messaging, and social media — runs about 60 MB/hour. One hour of that: $123. Four hours of normal use: $492. Eight hours, a full day out: $984. A 30-minute Zoom meeting alone adds $922. A 5-minute video call with family costs $154. These are AT&T's published pay-per-use figures. Source: AT&T international rate card, June 2026.
Personalize your savings
Your United Kingdom saving against $12 a day
Adjust the trip length, the carrier and the daily data below and the calculator reprices both sides. The starting point is the 7-day average stay recorded for United Kingdom: $84 on an AT&T day pass at $12 a day, against $28.49 for a 20GB travel eSIM. Both prices buy access to the same local operators.
Network coverage
Operator-by-operator coverage in United Kingdom
AT&T's International Day Pass for United Kingdom costs $12/day. AT&T connects your phone to local towers. A travel eSIM also connects to local towers, from $0.66/GB. Paying carrier roaming rates buys no speed advantage in United Kingdom. The 5G connection is the same on both. 5G coverage is available on O2 and T-Mobile UK in United Kingdom's main cities. Carrier roaming and eSIMs connect to 5G equally in those areas. Paying AT&T's $12/day roaming rate buys no additional access to those 5G towers. United Kingdom has widespread 5G coverage. 5G available in all major cities and many towns; rural gaps remain EE has the widest 5G coverage in the UK; Three offers best value with free EU roaming.
Network attachment record
The networks behind both prices in United Kingdom
HelloRoam publishes 3 local operators for United Kingdom: 3, EE and O2.
An eSIM attaches to one of them on arrival.
HelloRoam names no default, so the file cannot say which one your handset picks.
HelloRoam records a 5G label against 2 of the 3 operators.
Carrier roaming runs on local operators too. That is what a roaming agreement buys.
Same masts, two invoices. The gap on this page is a billing gap.
5G and 4G here are capability labels. Neither one is a speed reading.
3, EE and O2 carry the eSIM in United Kingdom. Across the whole file HelloRoam names 154 operators over 185 destinations, 117 of them with a single operator and 1.48 on average. Roaming buys wholesale access to that same list.
| Operator | Network generation on file |
|---|---|
| 3 | 4G |
| EE | 5G |
| O2 | 5G |
Source: HelloRoam package feed, read 17 August 2026. The feed publishes an operator list for every destination it sells. No speed test sits behind this table, and we ran none. The full operator map covers 185 destinations.
Pricing breakdown
Carrier roaming fees and eSIM prices for United Kingdom trips
AT&T International Day Pass in United Kingdom: 10 daily fees × $12 (AT&T's cap per bill cycle) = $120. eSIM 10GB plan on a local network: $6.60 for the same 14 days. Difference: $113.40 less than AT&T (95%). Verizon TravelPass reaches $168 over the same period.
Each day AT&T connects you to EE in United Kingdom costs $12. Buy a 10GB eSIM plan at $6.60 and that same daily access drops to $0.47/day. Over 14 days, the difference is $113.40. Three UK prepaid at £10 ($12) for 10GB with EU roaming included — hard to beat for UK+Europe trips.
eSIM pricing for United Kingdom: 1GB at $2.84 ($2.84/GB), 3GB at $7.10 ($2.37/GB), 5GB at $10.13 ($2.03/GB), 10GB at $15.93 ($1.59/GB), 20GB at $28.49 ($1.42/GB). AT&T's 14-day roaming bill is $120 regardless of data consumed. Unlimited eSIM data costs $33.60 for the same period, $86.40 less. UK eSIM prices at $0.66/GB are competitive; local SIMs offer even better value with no registration friction. Travelers in United Kingdom average 1.5GB of mobile data per day, so a 14-day trip needs roughly 21GB.
The unlimited ladder for United Kingdom reads 1 day at $3, 3 days at $8.55, 7 days at $18.48, 14 days at $33.60, 30 days at $61.20. Unlimited here means 2GB a day at full speed before a fair-use policy applies. At 30 days the rate is $2.04 a day. Catalogue prices read 29 Oct 2026.
Trip cost breakdown
Weekend, two-week, and month-long trips to United Kingdom: carrier vs eSIM
The 3-day traveler pays $36 on AT&T for maps and messaging in United Kingdom. A 3GB eSIM on a local network covers the same trip for $7.10 — $28.90 less.
The 14-day family vacation reaches $120 in AT&T charges per person. Four lines on one account come to $300, because each extra line used the same day adds $6. Four 20GB eSIM plans on a local network cost $113.96 combined — $186.04 less for the group.
A 30-day stay runs $120 on AT&T for video calls and streaming. A 50GB eSIM on a local network at $48.29 is 60% less for the same local towers. Rates checked June 2026.
Airport options
SIM card kiosks vs eSIM at Heathrow (LHR) / Gatwick (LGW) / Manchester (MAN)
Airport SIM cards at Heathrow (LHR) / Gatwick (LGW) / Manchester (MAN): $10-25 for 10-30GB / 30 days from EE and Vodafone and Three and Lebara, plus 5-10 min; WHSmith and Dixons sell SIMs at most terminals of your time. An eSIM on a local network: $2.84 for 1GB, installed from your couch before departure. Local prepaid shops sell cards for $10-20 for 10-20GB / 30 days — the cheapest option if you have time to find one. Each option has a different cost-convenience balance. The eSIM wins on speed. A local SIM may win on per-GB price.
Local alternative
Local SIM vs eSIM in United Kingdom
Local SIM activation in United Kingdom through EE and Vodafone and Three and Lebara takes 5-10 min; WHSmith and Dixons sell SIMs at most terminals including registration. A travel eSIM activates in under 2 minutes from the provider app. Cost difference: local SIM $10-20 for 10-20GB / 30 days vs eSIM $2.84. If price per GB matters most, the local option wins. If time matters, the eSIM wins.
Data planning
7-day United Kingdom data budget breakdown
United Kingdom has solid hotel and cafe WiFi, which trims cellular data use. With WiFi for large downloads, your mobile data averages closer to 1.5GB per day. A 20GB plan at $28.49 covers 11GB for 7 days.
At $28.49 for 20GB, you get roughly 256 hours of social media browsing, about 36 hours per day over 7 days. AT&T charges $12 a day, $84 in total, for the same data on a local network. For heavy data users, a 1-day unlimited plan costs $3, still under AT&T's $12/day pass.
Connectivity
United Kingdom WiFi access and cellular backup
United Kingdom has co-working spaces with fast, reliable WiFi in major cities. Free WiFi in cafes, pubs, Tube stations, and most public spaces; eduroam in universities An eSIM on a local network gives you 5G backup for neighborhoods between co-working locations, or wherever WiFi is slow.
Plan your data
How much data you need in United Kingdom
AT&T's International Day Pass at $12/day includes voice calls you may never use. If you rely on WhatsApp or FaceTime for calls, you are paying for bundled voice access in United Kingdom that a data-only eSIM does not charge for. A 20GB data-only eSIM on a local network costs $28.49 for 7 days — 66% less than AT&T.
United Kingdom supports 5G speeds on a local network and T-Mobile UK. AT&T and Verizon both tunnel roaming data through these same networks at those same speeds. A travel eSIM on a local network hits the same 5G benchmark at $0.66/GB — no speed penalty for switching from roaming.
Airport SIM counters at Heathrow (LHR) / Gatwick (LGW) / Manchester (MAN) charge $10-25 for 10-30GB / 30 days after a 5-10 min; WHSmith and Dixons sell SIMs at most terminals wait — still more than a 20GB eSIM at $28.49. Local prepaid SIMs in United Kingdom run $10-20 for 10-20GB / 30 days, requiring an in-person stop and sometimes a passport copy. An eSIM at $28.49 skips that entirely. Prices stable; competitive market with frequent promotions
Quick reference
United Kingdom Travel Essentials
999/112
999 and 112 both connect to emergency services in United Kingdom. 112 is the EU-standard number and works from any mobile phone, including roaming and eSIM devices, even without a registered local number. Save both before your trip.
Type G
United Kingdom uses Type G outlets (UK-style three large rectangular prongs). US plugs do not fit — bring a Type G travel adapter. Most US phone and laptop chargers are dual-voltage (100-240V) and work fine with just the adapter.
GMT/BST (UTC+0/+1)
GBP (£)
Tap-to-pay (Apple Pay, Google Pay) is accepted at most stores and restaurants in United Kingdom. Visa and Mastercard work at virtually all merchants. Carry a small amount of local GBP for markets, taxis, and small vendors that do not have card readers.
Good to know
United Kingdom uses Type G power sockets. A dead phone means a dead eSIM connection — pack the right adapter to keep your device charged between venues.
Good to know
In United Kingdom, dial 999/112 for emergency services. Calling 112 may not connect on all networks. This number works on any active SIM or eSIM, including plans with exhausted data balances.
Step by step
United Kingdom eSIM installation guide
- Verify eSIM compatibility — any iPhone from 2018 or Samsung Galaxy S20 and later works on United Kingdom's 5G network via EE
- Go to HelloRoam, select the United Kingdom 1GB plan at $2.84, and complete checkout — no physical SIM needed. Not sure which provider to pick? See our provider comparison.
- On iPhone: go to Settings > Cellular > Add eSIM > Use QR Code and scan the HelloRoam code — do this before your flight to Heathrow (LHR) / Gatwick (LGW) / Manchester (MAN) so it activates the moment you land
- On Samsung Galaxy: go to Settings > Connections > Mobile Networks, select your home carrier SIM, and turn off Data Roaming. The step-by-step roaming guide has Android screenshots.
- On Google Pixel at Heathrow (LHR) / Gatwick (LGW) / Manchester (MAN): go to Settings > Network > SIMs and set the HelloRoam eSIM as the preferred data SIM — 5G on EE confirms in seconds
- First-timer tip: set up WiFi Calling before your trip, not at the airport — some carriers require a verification step that needs a home network connection to complete
Data tips
United Kingdom data efficiency guide
Data usage by activity: social media 80 MB/hour, maps and navigation 50 MB/hour, WhatsApp voice calls 30 MB/hour, video calls 250 MB/hour, video streaming 1 GB/hour. Download Google Maps offline areas for United Kingdom before departure. Set social media apps to load images on WiFi only to reduce cellular usage by 40-60%.
Regional context
United Kingdom connectivity tips for Europe travelers
A few things to know before turning off carrier roaming in United Kingdom:
Three UK includes EU roaming at no extra cost — useful if combining UK with Europe trip
London Underground has 4G/5G coverage in most tunnels since 2024
No ID required to buy a SIM card — one of the easiest countries for tourist SIM activation
Contactless payment ubiquitous — many places are cashless; Apple Pay works everywhere
UK uses Type G plugs (3-pin) — unique to UK, Ireland, and former British colonies
Free WiFi in cafes, pubs, Tube stations, and most public spaces; eduroam in universities Roaming passes charge $12/day to fill WiFi gaps. An eSIM covers the same connectivity at $0.66/GB.
No SIM registration means local SIM is as convenient as eSIM in the UK — choice comes down to device support.
Summer June-August is peak; Christmas season busy in London
Nearby
Related destinations
6 destinations near United Kingdom are priced on the same rate card. AT&T bills $12 a day in every one of them, and the figure beside each flag is that destination's own per-gigabyte floor. The cheapest of the group is Austria at $0.74 a gigabyte.
Forgot your eSIM?
Last-minute eSIM options for United Kingdom arrivals
If you reach United Kingdom without an eSIM, your first 30 minutes at the airport determine your data costs. Heathrow (LHR) / Gatwick (LGW) / Manchester (MAN)'s arrivals area has free WiFi. Connect immediately — no queue, no counter. From there, HelloRoam, Holafly, Nomad, Airalo, and Saily all support post-arrival eSIM purchases. The process: download the app over WiFi, choose a United Kingdom plan, scan the QR code, and activate. A 1GB plan on a local network costs $2.84, against $24 for two days on AT&T's International Day Pass. If airport WiFi drops mid-install, hotel lobby WiFi provides a stable fallback for finishing the process.
Savings math
How much you save in United Kingdom
Solo traveler
Break-even point for a solo United Kingdom trip: day one. AT&T charges $12 for the first 24 hours. A 20GB eSIM at $28.49 is already cheaper than two AT&T days. By day 7, the eSIM has saved $55.51 total. There is no trip length at which AT&T roaming costs less than a travel eSIM for United Kingdom.
Family trip
Verizon TravelPass charges per line, not per account. A family of four pays $48/day ($12 x 4 lines). Over 7 days in United Kingdom: $336. Four eSIMs at $28.49 each: $113.96. Per-person savings: $55.51. All eight data connections (4 carrier, 4 eSIM) route through local 5G towers.
AT&T roaming rate analysis
Checking voicemail on AT&T in United Kingdom is treated as an inbound international call. That call starts a $12 Day Pass fee covering the next 24 hours, even if you did not plan to use data. A single voicemail check at 5 AM on your last morning adds $12 to your bill. Weekly AT&T cost: $84. Monthly: $120. A 20GB eSIM: $28.49 for 7 days on a local network. The eSIM does not charge for background triggers.
All-carrier summary
AT&T: AT&T International Day Pass costs 195% more than an eSIM for United Kingdom.
Verizon: Verizon TravelPass costs 195% more than an eSIM for United Kingdom.
T-Mobile: T-Mobile's International Passes cost 76% more than an eSIM for United Kingdom.
Against AT&T: $55.51 saved (66%). Against Verizon: $55.51 saved. Against T-Mobile's International Pass at $10/day: $21.51 saved. Against T-Mobile free tier: $0 carrier cost, but the throttle renders maps, ride-hailing, and video calls unusable. A 20GB eSIM at $28.49 delivers full 5G on a local network for less than any paid roaming option.
Quick answers
Common questions about United Kingdom data costs
Is eSIM cheaper than roaming in United Kingdom?
Carrier roaming in United Kingdom costs $84 on AT&T ($12/day for 7 days). An eSIM plan on a local network costs $28.49 for 20GB. Both connect to the same 5G cell towers. The eSIM is cheaper by $55.51, a 66% reduction. Rates checked June 2026.
How much does roaming cost in United Kingdom?
US carriers charge $12/day for United Kingdom roaming. UK carriers charge approximately GBP6/day. A 7-day trip costs $84 on AT&T or Verizon. A travel eSIM on a local network costs $28.49 for 20GB. Rates checked June 2026.
Does T-Mobile work in United Kingdom?
Yes, within the plan's allowance. T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. At 256Kbps Google Maps and ride-hailing apps stall. T-Mobile's 1 Day International Pass costs $10 for 2GB, and a week of passes $50 (10-day pass). A travel eSIM on a local 5G network costs $28.49 for 20GB over 7 days. Rates checked June 2026.
AT&T fine print for United Kingdom
$12 covers 24 hours from the first time your phone uses a foreign network, and a single background push notification at 2 AM can start it. AT&T bills at most 10 daily fees per line each bill cycle (terms read 31 Oct 2026).
iCloud Photos, email push, app updates all trigger the daily charge. A phone left in a bag with data roaming on starts a new $12 fee each time a sync lands after the last 24 hours ran out.
United Kingdom FAQ
United Kingdom eSIM & roaming questions
United Kingdom carrier roaming costs $12 a day on AT&T and on Verizon
AT&T bills $12 a day for the first line and $6 for each extra line, so a family of four in United Kingdom pays $30 a day, or $210 across a week. Verizon charges the full $12 on each line. T-Mobile's Experience plans include 5GB or 15GB of high-speed data abroad per line, then at a reduced speed. Travel eSIM plans are per device and do not share, so four phones means four plans from $2.84 for 1GB each, or one plan tethered to the rest. Holafly caps hotspot use at 1 GB per day on most plans, so a family leaning on tethering should buy fixed data instead. Rates checked June 2026.
T-Mobile's included data in United Kingdom runs at high speed until the allowance ends
It depends on the plan. T-Mobile's Experience More plan includes 5GB of high-speed data abroad and Experience Beyond 15GB, then data runs at up to 256Kbps. Essentials includes texting but no data. For more high-speed data in United Kingdom, a week of International Passes costs $50 (10-day pass), against $84 on AT&T. On a local 5G network, fixed eSIM plans start at $0.66/GB. HelloRoam's 7-day unlimited plan has the lowest median of the five at $21.50 across 35 countries, against $27.50 on Holafly. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
United Kingdom roaming bills by the day, not by the gigabyte
At 3 days in United Kingdom: AT&T costs $36, eSIM costs 1GB for $2.84. At 7 days: AT&T $84, eSIM same 1GB for $2.84. At 14 days: AT&T $120, eSIM same fixed rate. The eSIM billing model is flat: the longer the trip, the wider the gap. T-Mobile's included data costs nothing extra until its 5GB or 15GB allowance runs out, then runs at up to 256Kbps.
Carrier roaming beats an eSIM in United Kingdom on one-day stops and voice-only trips
Three cases, and they are real. First, T-Mobile does not charge for data in Mexico and Canada up to its plan's high-speed allowance, and nothing priced here beats free. Second, if you need your own number live for calls and texts without WiFi, a day pass does that and a data-only travel eSIM does not. Third, if you use almost no data, one AT&T day at $12 can beat buying a whole plan for a single overnight stop. Outside those three the arithmetic favors the eSIM in United Kingdom: $84 for a week on AT&T against $6.93 at $0.66/GB on EE. Rates checked June 2026.
Carrier roaming wins two cases in United Kingdom and loses the rest
Rarely. AT&T and Verizon both charge $12 a day in United Kingdom; AT&T's week costs $84. A 7-day trip at 1.5 GB/day costs about $6.93 on an eSIM at $0.66/GB, over a local 5G network. Same towers, different price. Roaming does win in two cases: T-Mobile does not charge for data in Mexico and Canada up to its plan's high-speed allowance, and a day pass keeps your own number live for calls and texts, which a data-only eSIM does not. Five providers sell the eSIM side: HelloRoam, Holafly, Nomad, Airalo, and Saily. Rates checked June 2026.
EU roaming caps cover EU contracts, not US carriers in United Kingdom
Because the rule binds European operators, not American ones. "Roam like at home" caps what a European carrier may charge its own subscribers inside the bloc. AT&T, Verizon, and T-Mobile sell US plans, so nothing in United Kingdom obliges them to follow it. They apply their standard international rates instead: AT&T and Verizon $12 per 24 hours, and T-Mobile 5GB or 15GB of high-speed data on its Experience plans, then up to 256Kbps. A travel eSIM skips the policy question by buying local capacity directly at $0.66/GB on a local 5G network. UK travelers should read their own tariff: Vodafone and EE include EU destinations on most plans, though not on all of them. Rates checked June 2026.
AT&T's $12 day pass against a United Kingdom eSIM plan price
No. AT&T International Day Pass costs $12/day in all European countries including United Kingdom. Over 7 days that is $84. A 5GB eSIM plan costs $10.13 for the same period on EE. The eSIM saves 88% and does not charge you on days when you only use WiFi — unlike the day pass, which triggers the moment any cellular data is used.
One plan can carry a Schengen route through United Kingdom
Pick on coverage count first, price second. A regional Europe plan puts the whole route under one data bucket, so crossing a border costs nothing extra. Airalo and Holafly each list 200+ destinations and Nomad lists 200. Airalo's 5 GB plan works out at $2.40/GB on the 30 Oct 2026 medians. HelloRoam covers 185 at $2.01/GB, the lowest median 5 GB rate here; Nomad runs $2.30/GB. Holafly sells unlimited only, at a 7-day median of $27.50, across 200+ destinations, level with Airalo. AT&T and Verizon charge $12/day in every Schengen country alike, so four countries over two weeks through United Kingdom still bills $120. Carrier rates checked June 2026; eSIM prices from the 30 Oct 2026 price check.
GDPR governs what a travel eSIM records about a United Kingdom trip
GDPR governs how companies process personal data, not how your phone uses mobile data. A travel eSIM in United Kingdom connects to a local network — the same infrastructure AT&T and Verizon route roaming through. GDPR does not change connection speeds, pricing, or data limits. Both carrier roaming and travel eSIMs log metadata (connection times, data volumes) as part of standard carrier operations. GDPR applies to the provider's handling of that log data, not to your browsing or usage.
A week of United Kingdom carrier roaming costs $84
AT&T: $84/week (International Day Pass at $12/day). Verizon: $84/week (TravelPass). T-Mobile: 5GB or 15GB of high-speed data included on its Experience plans, then up to 256Kbps, or $50 for a week of passes (10-day pass). The cheapest eSIM for United Kingdom starts at $0.66/GB on a local 5G network — better per-GB value than all three carriers.
Fact check
Common myths about roaming and eSIM in United Kingdom
T-Mobile includes free international data
T-Mobile's Experience plans include 5GB or 15GB of high-speed data abroad, then up to 256Kbps, too slow to load a map tile in United Kingdom past the allowance. Its 1 Day International Pass costs $10. Exception: T-Mobile does not charge for calls, texts or data in Mexico and Canada; depending on the plan, up to 30GB is at high speed, then up to 256Kbps. United Kingdom is not on that list. Rates checked June 2026.
Carrier roaming is more reliable than an eSIM
Reliability is determined by the local carrier's network, not the billing layer above it. AT&T roaming in United Kingdom routes through a local network. A travel eSIM also routes through a local network. Both connections depend on local network coverage in any given area. AT&T charges $12/day for a connection with zero reliability advantage over the $2.84 eSIM.
Pay-per-use international data rates are reasonable
AT&T's pay-per-use international data rate is $2.05/MB without an active plan. At that rate, 1 GB costs $2,099. A single Google Maps navigation session in United Kingdom loads 50–100 MB — that is $102–$205 at pay-per-use. A 1GB eSIM on a local network costs $2.84 for the same data. Always activate a day pass or eSIM before your flight. Rates checked June 2026.
Our recommendation
The numbers: eSIM vs roaming in United Kingdom
For a standard trip to United Kingdom, HelloRoam covers the bases. HelloRoam covers United Kingdom on a local network and scores 9.9/10 on our rubric, the highest of the 5 providers we price. A 1GB plan costs $2.84. Unactivated plans are refundable for 180 days, and its support replies in your own language. Holafly is the alternative for heavy data users: it states no daily cap, at a 7-day unlimited median of $27.50 on 30 Oct 2026.
Learn more
Travel guides, United Kingdom
4 guides carry the parts of a United Kingdom trip this page does not price: installing the profile before departure, switching data roaming off on the home SIM, and what happens to the allowance once a fair-use policy applies. Each one reads the same rate card as this page, where AT&T bills $12 a day.
A 7-day trip to United Kingdom costs $84+ on carrier roaming vs $28.49 on eSIM
Over 7 days, carrier roaming in United Kingdom runs $84. A 20GB eSIM plan costs $28.49. Difference: $56.
Get a United Kingdom eSIM