UK eSIM with Phone Number: Best Plans for Calls and SMS

A UK eSIM with a phone number for calls and SMS runs you between 5 GBP and 35 GBP a month. Finding a UK eSIM card with phone number capability built in is surprisingly straightforward once you know which providers offer full-service plans. A data eSIM paired with a cheap voice line often costs less than an all-in-one contract plan. Based on provider plan comparisons (September 2026), giffgaff (10 GBP for 25 GB on the O2 network) and Lebara (10 GBP for 30 GB on Vodafone’s network) are the two best options for anyone who needs SMS verification for Uber, banking, and food delivery apps. Here’s the honest truth, though: data-only eSIMs like Roami cost less and work brilliantly for browsing, maps, and messaging. They just can’t receive SMS verification codes from UK banks (Monzo, Starling, HSBC), ride-hailing apps (Uber, Bolt), or the NHS. All three of those require a real UK mobile number — not a VoIP number, which most UK services refuse for verification.

Why does this matter? Consider a common scenario at Heathrow Terminal 3: You’ve landed, grabbed your bags, and opened Uber. The driver can’t find you at the pickup point. They try calling your home number — which, thanks to your carrier’s roaming setup, goes straight to voicemail. They cancel. You wait another 18 minutes for the next ride. With a UK number, that call goes through and you’re in the car in five minutes.

• Data-only plans (Roami): No phone number, no SMS, no calls. Perfect if you only need internet, maps, and messaging apps — and that’s honestly most tourists
• Full-service plans (giffgaff, Lebara): Real UK mobile number with SMS and voice. Required for Uber account creation, UK banking 2FA, and NHS registration
• Hybrid approach (recommended): a Roami data eSIM for internet plus a cheap giffgaff voice eSIM for calls and SMS — the best combination of value and coverage.
• Cost range: 5-35 GBP/month for full-service; travel data eSIMs from $1.99 (priced in USD)

But a warning: the hybrid approach means managing two SIMs. If you’re not comfortable with dual SIM settings, stick with a single full-service plan. You’ll pay a bit more but you won’t have to think about which line handles what.

For a complete overview, see the UK eSIM guide.

Why might you need a UK phone number with your eSIM?

A UK phone number is essential if you need SMS verification for banking apps, ride-hailing services, food delivery, NHS healthcare registration, or job applications during your stay in Great Britain. Data-only eSIMs can’t receive SMS, which means they can’t pass the 2FA checks that virtually every UK service runs.

Most tourists, in practice, do not need one.

If you’re in London for four days and your main activities are the Tower of London, Borough Market, and a West End show, your existing Uber account and WhatsApp will work fine over data. You don’t need a UK number for that. Where it bites you is when you’re opening a Monzo account, registering with a GP, or applying for a flat — the kind of stuff that only matters on trips longer than two weeks.

giffgaff’s goodybags run from 6 GBP to 35 GBP per month for a UK phone number with data. Data-only eSIMs from providers like Roami cost less and work well for users who don’t need to receive SMS verification codes from Uber, banks, or food delivery apps.

The catch? giffgaff’s activation can take up to several hours. Lebara typically completes within 30 minutes. If you’re arriving tomorrow, buy tonight.

Can I get a UK phone number with an eSIM?

Yes, several UK providers now offer eSIM plans that include a real UK mobile number with full calling, SMS, and data capabilities. You can get a UK number on an eSIM whether you are planning a London city break or a multi-city tour, by choosing a full-service provider like giffgaff, Lebara or Lyca Mobile. These are proper mobile numbers, not VoIP or virtual SIMs.

The UK eSIM data only vs with calling plan decision comes down to one question: do you need SMS verification for banking, Uber, and other services? Most providers fall into two camps.

Data-only plans — these give you a data connection only. No phone number, no SMS, no calls. Roami falls into this category. Many travellers find data-only is all they actually need, as long as they’re prepared for the limitations.

And let’s be real about those limitations: you can’t sign up for Deliveroo from scratch. You can’t receive that SMS code from your new Monzo account. You can’t get NHS appointment reminders. For most tourists, that’s not a problem. But it catches people out.

Full-service plans — these include a UK phone number with voice minutes, SMS, and data. Providers like giffgaff, Lebara, and Lyca Mobile all offer these, and they’re the closest thing to having a proper UK SIM without a physical card.

Full-service plans often cost more than data-only options, especially for short trips. You’ll typically need to go through some form of identity verification. The UK has no blanket statutory ID registration rule for mobile lines, but full-service providers run their own compliance checks before assigning a number.

Do I need ID to buy a UK eSIM? Usually, yes, for full-service plans. There’s no blanket UK law requiring ID registration for mobile lines, but full-service providers run their own identity checks before assigning a number — in practice you’ll generally be asked for a photo of your passport or national ID card.

For data-only plans like Roami, the process is simpler — usually just an email address and payment.

Do I need a UK address for an eSIM? No, not for tourist-friendly providers. giffgaff and Lebara let you register with your home address and a passport. Some providers may ask for a UK address, in which case your hotel or Airbnb address should work for verification.

One common issue: Lebara’s form can be finicky about address formatting, particularly with flat numbers in UK addresses. Plan for 10 extra minutes of form-fiddling if you run into validation issues.

How does a UK eSIM for Uber and essential apps work?

A UK phone number is required to create accounts on Uber, Bolt, Deliveroo, and Just Eat — and for SMS-based two-factor authentication on UK banking apps like Monzo, Starling, and HSBC. Data-only eSIMs can’t provide this, which is why a UK eSIM for Uber and public transport apps matters so much for visitors. An eSIM for the UK with a full phone number is the only reliable way to pass SMS verification for local services.

Banking and financial services

This is the most critical use case. If you’re planning to open a UK bank account, you’ll need a UK phone number for SMS verification. Almost every UK bank uses two-factor authentication via text message — Monzo, Starling, Revolut, HSBC, and Lloyds all do it. Without a UK number, you hit a wall. Even if you’re just using your existing credit card abroad, some payment systems trigger SMS verification for unusual transactions.

The Revolut exception is worth knowing: if you already have a Revolut account from home, it’ll work over data without SMS re-verification. It’s only new UK account creation that triggers the SMS requirement.

Ride-hailing and food delivery apps

Uber, Bolt, Deliveroo, Just Eat, and Uber Eats all require a phone number to create and verify your account. Your home number may not work for SMS while you’re abroad, or may charge ridiculous roaming rates. When an Uber driver needs to call you about your pickup location and your home number is unreachable, the ride gets cancelled. This isn’t a hypothetical — it’s a common traveller frustration. A UK number solves this cleanly.

NHS and healthcare access

Registering with a GP, booking an appointment, or accessing NHS services requires a UK phone number for SMS appointment reminders, test results, and prescription notifications. Even registering for NHS login requires a UK mobile number for verification. For trips longer than a few weeks, this matters.

GP registration in the UK can take over a week even with all documents ready, based on NHS processing timeframes. Plan accordingly.

Job applications and professional contact

Putting a foreign number on your CV when looking for work in the UK is a red flag for employers. A UK number makes you look local and accessible.

Public Wi-Fi and services

Many public Wi-Fi networks in UK train stations, coffee shops, libraries, and shopping centres require SMS verification to connect. Without a UK number, you’re limited to mobile data. Station WiFi networks at major London terminals, for instance, often require SMS or email verification — so having a UK number active can make the difference between connecting and going without.

Do you actually need one?

• Condition: Short trip of a week or less, staying in London and major UK cities — Recommendation: Data-only UK eSIM plus workarounds (WhatsApp, existing accounts). You’ll be fine.
• Condition: Trip longer than a week, or any activity beyond basic sightseeing — Recommendation: UK phone number via giffgaff or Lebara. The SMS access alone justifies the cost.
• Condition: Need both best data coverage and a UK number — Recommendation: Hybrid approach — Roami for multi-network data + giffgaff voice eSIM. This is the recommended configuration for most long-stay visitors.

A UK eSIM with 5G combined with a voice line gives you multi-network data across EE, Vodafone, and O2 while keeping a UK number for calls and SMS verification.

Which UK eSIM plans include a phone number in 2026?

giffgaff (10 GBP for 25 GB on the O2 network) and Lebara (10 GBP for 30 GB on the Vodafone network) are the two best full-service UK eSIM options for tourists who need a phone number with calls and SMS in 2026. That’s based on giffgaff’s eSIM pages and Lebara’s published plans.

But let’s be blunt: neither of them has great data speeds compared to a dedicated data eSIM. Single-network MVNOs are typically the slower option in busy areas, while multi-network eSIMs like Roami connect to the fastest available carrier at any given location. For maps and messaging, the difference is academic. For video calls? You’ll notice it.

giffgaff — best overall for tourists

giffgaff runs on the O2 network, giving solid coverage across UK cities with decent service in rural areas. No fixed contracts, no credit checks, and you can change your plan month to month. That flexibility is genuinely useful.

giffgaff current goodybags:

• 10 GBP/month — 25 GB data, unlimited calls and texts
• 15 GBP/month — 80 GB data, unlimited calls and texts
• 35 GBP/month — Unlimited data, unlimited calls and texts

(A 6 GBP entry goodybag also exists — check giffgaff’s site for the current ladder, which is revised periodically.)

The 10 GBP or 15 GBP options are plenty for most visitors. Unlimited calls and texts means you can use your UK number freely for Uber, food delivery, bank verification, and everything else.

The real downside: giffgaff can take hours to activate your eSIM — waits of several hours are not unusual. Not a problem if you’re setting up from home the night before. A genuine problem if you’re standing in Heathrow arrivals trying to get connected. Set it up a day or two before you travel — don’t leave it to the last minute.

Lebara — strong contender for short trips

Lebara runs on Vodafone’s network, which gives it strong coverage across UK cities. It’s especially popular with travellers from Europe, Australia, and South Asia due to competitive international calling rates.

Lebara key plans (per Lebara’s published 30-day lineup):

• 5 GBP/month — 5 GB data, 1,000 UK minutes and texts
• 10 GBP/month — 30 GB data, unlimited UK calls and texts
• 15 GBP/month — 50 GB data, unlimited UK calls and texts
• 25 GBP/month — Unlimited data, unlimited UK calls and texts

For a week-long trip, the 5 GBP plan is plenty, especially with Wi-Fi at accommodation. Lebara’s SIM setup typically completes within 30 minutes via the app with passport verification — much faster than giffgaff’s multi-hour activation window.

The catch with Lebara: the app can be clunky with occasional crashes during verification. Customer support is email-only with response times that can stretch to several hours. Once it works, it works, but the setup experience isn’t polished.

Lyca Mobile — budget-friendly option

Lyca Mobile runs on EE’s network, which offers the fastest average data speeds in the UK. Their pricing is aggressive:

• 5 GBP/month — 5 GB data, 1,000 UK minutes and texts
• 10 GBP/month — 30 GB data, unlimited UK minutes and texts
• 15 GBP/month — 75 GB data, unlimited UK minutes and texts
• 25 GBP/month — Unlimited data, unlimited UK minutes and texts

The 5 GBP plan is incredibly cheap, though 5 GB won’t go far for heavy data users. Here’s the real problem with Lyca: customer service. Activations can take several hours and may require multiple support contacts via a chatbot that occasionally loops. If activation goes smoothly, you’re getting EE’s excellent network for peanuts. If it doesn’t, you’re in for a frustrating afternoon.

Comparison table

Quick verdict: for most tourists, get giffgaff. For short trips where speed matters, get Lebara. For the absolute cheapest option, Lyca works — if you have patience.

What a UK eSIM Number Adds to Your Trip Cost

A UK number is a separate purchase from your data plan, and the two price lines behave in opposite ways. Data scales with the length of your trip; a UK voice plan does not, because prepaid bundles are sold in fixed 30-day blocks whether you stay a week or a month. Here is what the voice half actually costs at the published September 2026 rates:

Read the last two columns against each other. The same 5 GBP bundle costs you 71p a day on a short trip and 17p a day on a long one — a four-fold difference for an identical product. Your data line behaves the other way round: a 3-day plan stretched across a week costs more per day than a 30-day tier, because you have to buy it again.

Two consequences follow. On a short trip, treat the number as a fixed fee, not a daily rate — you are buying a month of voice service to cover seven days, which is why a 5 GBP bundle can look like a surprisingly large share of a short-trip bill. On a long stay, it is almost free, because the 30-day bundle is finally being used in full.

One waste to know about: the entry bundles all ship with data you will not use, so you are really buying the number and the data is the wrapper it comes in — no cheaper UK product sells a bare mobile number with SMS and nothing else. If the number exists purely to receive one or two verification codes, use the entry bundle as a receiver only, leave data roaming off on that line, and route all internet traffic to the data eSIM.

Can you use a data-only UK eSIM with a VoIP workaround?

Yes, VoIP services like Google Voice and Sipgate can give you a UK phone number over a data-only eSIM — but they won’t reliably receive SMS verification codes from UK banks, Uber, or the NHS, because many services flag VoIP numbers as non-mobile.

Independent testing shows consistent results: real UK mobile numbers (giffgaff) receive SMS verification from all major services including Monzo, Uber, and Deliveroo. VoIP numbers typically receive none. Zadarma and similar VoIP services receive some but not all. Your mileage may vary, but the pattern is clear: VoIP won’t cut it if SMS verification matters.

VoIP services comparison

Other VoIP providers — UK virtual numbers from various VoIP resellers, typically 2-4 GBP/month. You get a working number that can receive calls, with voicemail included. SMS reception is unreliable at best, and many services block these numbers outright.

Google Voice — Generally only available to US users. If you already have a Google Voice number from home, it’ll work over data in the UK, but it’s not a UK number.

Zadarma — UK virtual numbers from roughly 2 GBP/month. SMS support is limited.

When VoIP works: Making and receiving voice calls, voicemail, WhatsApp and iMessage registration, non-SMS two-factor apps (authenticator apps work fine).

When VoIP falls short: Bank SMS verification (almost always blocked), Uber and Deliveroo account creation, NHS services, government service logins, any SMS-based OTP system.

The bottom line: VoIP is a workaround, not a replacement. If you actually need SMS verification, get a real UK mobile number. You’ll save yourself the headache of finding out the hard way.

What is the best UK eSIM with phone number setup?

The hybrid approach — a data-first UK eSIM like Roami for internet combined with a cheap giffgaff or Lebara voice eSIM for calls and SMS — gives you the best coverage across Great Britain plus a real UK phone number at a total cost of roughly 20-40 GBP. After comparing full-service plans, data-only plans, and hybrid setups side by side, the hybrid approach consistently delivers the best combination of data performance and SMS capability.

Option 1: Data plan + cheap voice eSIM (hybrid — recommended) Use a data-focused UK eSIM plan like Roami as your primary internet connection. Roami’s auto carrier switching across EE, Vodafone, and O2 means you’re always on the strongest available network anywhere in Great Britain. Add a cheap giffgaff voice eSIM (or a Lebara SIM) as a secondary line for your UK phone number.

This dual SIM setup gives you:

• Primary (Roami data plan): High-speed data, auto network switching, no worrying about rural coverage gaps
• Secondary (giffgaff voice eSIM or Lebara SIM): Real UK phone number for SMS verification, OTPs, and calls

Modern phones handle dual SIMs well — iPhones from the iPhone 13 onwards support two eSIMs simultaneously. Total cost: a 10 GBP giffgaff goodybag plus a Roami data plan often costs less than a single all-in-one roaming plan, with better data performance.

But managing battery life on dual SIM is real. Dual SIM mode on modern iPhones increases battery drain by roughly 10-15% when both lines are active simultaneously. Carry a power bank if you’re out all day.

See the UK eSIM dual SIM manual for step-by-step instructions.

Option 2: Keep your home SIM + UK eSIM

Keep your home SIM active for calls and SMS while using a UK eSIM for internet. Most modern phones support dual SIM mode where your home SIM handles calls and SMS while the UK eSIM handles all data. The catch: if your home provider charges for incoming SMS while roaming, costs can add up.

Some US carriers bill SMS while roaming at per-message rates, and the costs quietly accumulate when your banking apps and ride services text you all day. Switch SMS to your UK number immediately after landing if your home carrier charges for incoming texts.

Option 3: Full-service plan only

Get a full-service plan from giffgaff or Lebara — data, calls, and a UK number all in one package. This is the simplest option and works fine for most people. But data speeds won’t match a dedicated multi-network data plan with auto-switching. Speed tests at busy London locations like King’s Cross station typically favour multi-network eSIMs (Roami), which hop to whichever carrier is least congested, over single-network eSIMs (O2 via giffgaff) tied to one carrier’s capacity. If you’re just doing email and maps, you won’t care. If you’re on Zoom calls all day, you will.

Can I use a UK eSIM for multiple devices including a laptop and iPad?

Yes. Roami, giffgaff, and Lebara all include hotspot tethering within your data allowance as of 2026, so a laptop or iPad can share the phone’s connection without a second plan. Some tablets also accept an eSIM profile directly, which removes the phone from the chain entirely.

If you need a UK eSIM with unlimited hotspot tethering — especially for sharing with family or remote work — here’s the breakdown:

Roami (data-only): Hotspot is fully supported within your plan allowance. After the plan’s daily high-speed allowance, speeds drop to around 512 Kbps — enough for Slack, email, and basic web browsing, but don’t plan on downloading large files once you’ve hit the limit. The daily caps and tethering rules each UK eSIM provider applies to its unlimited tier are compared in our UK eSIM unlimited data guide.

giffgaff: Hotspot supported on all plans, including the 10 GBP/month goodybag. If you’re looking for a UK eSIM with unlimited hotspot tethering that also includes a UK phone number, giffgaff is a solid choice.

Lebara: Hotspot supported.

Lyca Mobile: Hotspot supported on most plans (some cheap plans may restrict it).

EE, Vodafone, and O2: Hotspot supported on standard plans.

eSIM on iPad: If your iPad supports eSIM (iPad Pro 12.9-inch 3rd gen and later, iPad Air 3rd gen and later, iPad 7th gen and later, iPad mini 5th gen and later), you can install the plan directly on the iPad if your provider allows multi-device installation. Roami supports direct eSIM installation on compatible iPads.

eSIM on laptop: Very few laptops have built-in eSIM support. For most people, hotspot from your phone is the way to connect a laptop. It’s clunky but it works.

Multiple lines on one device: Modern iPhones support 8 or more eSIMs stored on the device, with two active simultaneously. You could have a Roami data plan as primary, a giffgaff voice eSIM for your UK number, your home eSIM for your original number, and additional eSIMs for other countries.

See the UK eSIM top picks for how different eSIMs stack up for multi-device usage.

Can I keep my existing number with a UK eSIM?

You can’t port your home (non-UK) number to a UK eSIM, but you can keep your home number active through dual SIM mode — your home SIM stays in the phone for calls and SMS while your UK eSIM handles data. That’s the short answer. The longer one: number porting doesn’t cross borders, period.

Porting your home number: Number porting only works within the same country. You can’t port a US, Canadian, or Australian number to a UK mobile service. You’d have to give up your home number entirely and get a UK number instead. Don’t do that.

Dual SIM method (recommended): Keep your home SIM active (physical or eSIM) and add a UK eSIM as a second line. Your home number stays reachable for calls and SMS, while you use the UK eSIM for data and optionally a UK number. This is covered in the UK eSIM install guide.

But here’s something rarely discussed: some UK mobile networks route international calls differently, which can affect call stability on cross-border voice. It’s not a dealbreaker, but if calls are mission-critical for your trip, make a few test calls before you rely on any single line.

Virtual UK numbers for business: If you want a UK number that looks professional, some providers offer virtual UK numbers with area codes like 020 (London), 0161 (Manchester), or 0121 (Birmingham). These are usually VoIP-based and work best paired with a data plan. Same SMS limitation applies, though — most can’t receive shortcode verification texts.

Which apps need a UK phone number versus a data-only eSIM?

Uber, Bolt, Deliveroo, Just Eat, UK banking apps, and the NHS app all require SMS-based phone verification — a data-only eSIM can’t create accounts on these services. Choosing a UK eSIM for Uber and public transport apps like Citymapper means you can navigate and book rides without worrying about your home number being unreachable in Great Britain.

The Uber scenario: You land at Heathrow, open Uber, request a ride. Your driver tries to call because they can’t find your exact pickup point at Terminal 3. If your home number doesn’t work for incoming calls while roaming, the driver cancels. This is a commonly reported scenario among international travellers. With a UK number, you answer, explain your location, and the ride proceeds. This isn’t edge-case stuff.

Apps that need SMS verification (UK number required or strongly recommended):

• Uber and Bolt (account creation and driver calls)
• Deliveroo, Uber Eats, Just Eat (account creation and delivery coordination)
• Monzo, Starling, Revolut, HSBC, Lloyds (SMS 2FA for banking)
• NHS App (registration requires UK number)
• GOV.UK Verify (government services)
• Facebook Marketplace (often triggers SMS verification from new locations)

Apps that work fine with data-only

• WhatsApp (verify with home number before travel and it keeps working)
• Telegram, Google Maps, Apple Maps, Citymapper
• Trainline (works with email registration)
• Airbnb, Booking.com (works with existing account)
• Instagram, TikTok, Twitter/X, Netflix, Spotify, YouTube

The WhatsApp exception: If you verify WhatsApp with your home number before leaving, it’ll work over data throughout your trip. The only issue is if you need to re-verify while abroad — if your home number can’t receive SMS while roaming, you’re stuck. Don’t uninstall WhatsApp mid-trip. Just don’t.

What if my UK eSIM cannot receive SMS verification codes?

If your UK eSIM can’t receive SMS verification codes, first confirm your plan actually includes SMS capability — many data-only plans can’t receive SMS at all, regardless of settings. That’s the first thing to check and the most common cause.

Common causes and fixes

Is the plan actually full-service? Double-check that your plan includes SMS. Some travel plans advertise as “with phone number” but only support data and maybe voice — not SMS. This kind of misleading marketing isn’t unheard of among budget providers. Read the fine print.

Is SMS properly configured? On iPhone: Settings > Messages > Send & Receive, make sure your UK number is selected. On Android: check that your messaging app is set to use the correct SIM for SMS. In a dual SIM setup, your phone might be sending SMS from your home SIM.

Is your provider blocking shortcodes? Some budget providers route SMS differently. Certain shortcodes used by banks and apps may not reach your eSIM. If you consistently can’t receive SMS from a specific service, try switching to manual network selection, checking with your provider about shortcode support, using an authenticator app instead of SMS for 2FA, or contacting support to request voice call verification instead.

For example, verification texts from some banks send via shortcodes that don’t reach every MVNO the same way — if one specific sender never arrives, check with your provider about shortcode support before assuming the problem is your phone.

Is iMessage interfering? On iPhone, if iMessage activation is pending or stuck, SMS from other iPhone users gets delivered through iMessage rather than traditional SMS. Go to Settings > Messages and toggle iMessage off and on. Check that your UK number is listed and verified under Send & Receive.

Two-Factor Authentication: When a UK eSIM Can Skip SMS

Most of the demand for a UK number comes from two-factor authentication, and that demand is softer than it looks. SMS is the weakest of the common second factors, and a growing share of services will let you replace it with something that works over any data connection — including a data-only eSIM with no number at all. Authenticator apps are the direct substitute: a time-based code generator works entirely offline, is tied to your account rather than your SIM, and keeps working when you change number or lose a phone. Banking apps increasingly authenticate inside the app too, asking you to approve a login or payment on a device that is already signed in — a flow that needs data, not SMS.

The pattern is worth internalising: SMS is needed at the moment an account is created, and much less often afterwards. If you already hold accounts with the services you rely on, a data-only eSIM will carry you through the trip. If you are moving to the UK and will be opening banking, healthcare and employment-linked accounts, a number is not optional.

That gives you one piece of homework worth doing before you fly: go through your accounts while your home number is still active and move anything that offers an authenticator app onto it. Ten minutes at home removes most of the situations where you would otherwise be stranded abroad waiting for a code that cannot arrive. If you are assembling the two-line setup for the first time, our UK eSIM dual SIM setup guide covers the switching settings that trip people up.

Receiving a UK SMS Verification Code on an eSIM While Abroad

The single most common question about UK numbers is whether they still work once you have left. The answer is mechanical rather than mysterious: an SMS is delivered to your UK number over whichever network that line is registered on. If your UK line is switched on and roaming is enabled, it registers on a local network in whatever country you are in and the text arrives normally.

Receiving texts abroad is normally free. giffgaff’s published roaming rate tables list receiving texts at no charge both inside and outside the EU zone. Sending is a different matter — that is charged — but inbound verification codes are the case that matters here, and they cost nothing.

Two practical points follow.

Data roaming off, voice roaming on is the configuration you want. A number that has to receive a bank code needs roaming enabled, but it does not need data — turning data roaming off keeps the line reachable without letting it quietly drain its own allowance. And codes do not queue indefinitely: if a text arrives while your line is unregistered, most prepaid services will not hold it and deliver it later.

Order the code while you can still receive it. Many services let you resend a code but limit repeated attempts, so trigger verification at a moment you know your UK line is live rather than at an airport gate with the phone in your bag. If you added the number later but never used it, it may still be inside the provider’s activation window and not yet live — our UK carrier eSIM guide covers what each network’s activation actually requires.

Can you make calls with a UK eSIM?

With a full-service plan (giffgaff, Lebara, Lyca), yes — you get standard voice calling through the mobile network. With a data-only plan (Roami), no — use WhatsApp, FaceTime, or Zoom for voice calls over data instead.

Voice quality varies by network and by how consistently VoLTE and HD Voice are deployed on your route — city centres are generally strong across all the UK networks, but it’s worth making a test call on your first day.

International calling rates

• giffgaff: International calls charged separately on top of your goodybag, with pay-per-use rates that vary by destination — check giffgaff’s rates page before relying on it.
• Lebara: Some plans include international minutes. Rates to India, Pakistan, and Bangladesh are particularly competitive.
• Lyca Mobile: Historically strong on international calling, with competitive rates to South Asia, Africa, and Eastern Europe.
• Roami (data-only): No voice calling. Use WhatsApp, FaceTime, or another VoIP app over your data connection.

What network coverage should I expect with a UK eSIM phone number plan?

Coverage depends on which UK network your eSIM uses. giffgaff uses O2 (good in UK cities, weaker in rural Scotland and Wales). Lebara uses Vodafone (good in cities and major routes, moderate in rural areas). Lyca Mobile uses EE (best rural coverage in Great Britain, strongest overall). Independent drive-testing confirms the broad pattern: EE (via Lyca) holds signal through rural stretches like the Pennines; O2 (via giffgaff) is patchier in remote spots like the hills around Penrith.

Roami’s unique advantage is auto carrier switching — instead of locking you to one network, Roami’s eSIM automatically selects the strongest available network at your location, switching between EE, Vodafone, and O2. If you’re moving around the UK and especially if your trip includes both cities and countryside, this auto-switching makes a real difference in day-to-day reliability.

But auto-switching isn’t magic. In the Cairngorms, all four networks go dead. No amount of switching helps when there simply aren’t any towers. Download offline maps before you head into seriously remote areas.

For more on how UK networks compare, see the UK eSIM network and MVNO guide.

Which plan shape do you actually need? Data-only, voice, SMS or talk and text

Most confusion about UK eSIM phone numbers comes from mixing up four different products that all get called “a plan with a number”. Sort out which shape you need and the rest of the decision collapses.

Two honest notes about that table. First, SMS-only and voice-only eSIM plans barely exist as products in the UK — they show up in search autocomplete because people are reasoning from what they want rather than what is sold. If you only need to receive verification texts, the cheapest real product is a low-cost talk-and-text plan from an MVNO, used purely for SMS while a data eSIM handles internet. Second, “number only” is a use case, not a product line: you achieve it by buying a voice plan and simply not using the voice part. Travellers asking on Reddit about a UK eSIM data-only plan that can still receive the one bank code they need are usually better served by that hybrid than by hunting for a product that does not exist.

The practical split most visitors land on: a data-only UK eSIM for connectivity plus a talk-and-text MVNO plan for the number. That configuration covers calls, SMS verification and data without paying twice for data you will not use.

UK virtual numbers, landline numbers and second numbers

There is a third option between “no number” and “full MVNO plan”, and it is the most misunderstood one.

Virtual UK numbers are VoIP numbers hosted by a service rather than a SIM. They work for outbound and inbound calls over a data connection, and they come with real UK area codes — 020 for London, 0161 for Manchester, 0121 for Birmingham. Several providers sell them from roughly 2-4 GBP per month, and for a professional-looking contact number on a CV or a business listing they do the job.

Where they fall down is SMS verification. Most virtual numbers cannot receive shortcode verification texts, which is exactly what UK banks, Uber, Deliveroo and the NHS app send. A virtual number that receives a normal text message from a friend may still reject a bank’s shortcode. If your requirement is account verification, treat a virtual number as unproven and test it before you rely on it.

UK landline numbers over eSIM are the same category. A landline-format number (020, 0117 and so on) cannot be issued on a mobile eSIM by a UK network — landline numbering is a different range with different regulation — so what you get is a VoIP landline number riding on your data connection, with the same shortcode limitations.

Second numbers and new numbers. If you want a second UK mobile number alongside your primary line, that is a talk-and-text plan, not a virtual number. If you want a brand-new UK number rather than porting anything, that is simply a fresh prepaid activation — there is no transfer step, and you buy it the same way you buy any other UK eSIM plan. Buying a UK eSIM number online means precisely this: the plan arrives with a number assigned, and the number is yours for as long as the line stays active.

One warning on number porting. You cannot port a US, Canadian, Australian or EU number onto a UK eSIM, and you cannot port a UK number onto a travel eSIM that has no number range at all. Porting only moves numbers within the same country. Keep your home line alive on dual SIM if you need your original number reachable — the UK eSIM dual SIM setup guide covers the configuration.

How to Keep a UK eSIM Number Alive After You Leave

A UK prepaid number does not sit dormant forever. Leave it long enough without activity and the provider reclaims it, and a recycled number is not recoverable — you get a new one if you come back.

The window is six months of no activity. giffgaff deactivates a SIM that has not been used for six months. Four things reset the clock: a single chargeable call, text or MMS to another number, one connection to mobile data, or one top-up or plan purchase. Receiving a call or sitting on Wi-Fi does not. giffgaff sends warning emails about a month and about five days before deactivation, so the process is hard to miss if the email on the account is still live.

The 30-day PAC window is the useful part and the one people miss. Even after the SIM is switched off, a UK number can still be rescued by moving it to another network — but only inside that window. Past it, the number is gone and any credit expires with it.

In practice, keeping a UK number costs about 30p a year. Set a repeating calendar reminder for roughly 170 days, and when it fires, send one text from the UK line. That single chargeable action resets the six-month clock. You do not need to keep buying bundles, and you do not need to keep the line in a phone you carry — a spare handset left on charge once in a while does the job.

One caveat worth stating plainly: these are giffgaff’s published terms, and Lebara, Lyca and the network-owned prepaid products each set their own inactivity windows and recovery rules. Read the terms of the provider you actually used rather than assuming six months.

Which UK eSIM plan should you choose for your trip type?

Your choice of UK eSIM with phone number depends on trip duration and what you plan to do in Great Britain. Here’s what works best for each scenario, based on plan specifications and coverage data.

For the weekend tourist: Data-only is simplest. A small data plan for about 10-15 GBP, WhatsApp and iMessage for communication, and existing Uber and Deliveroo accounts work fine on data. For a weekend, you won’t miss having a UK number. Alternative: Lebara’s 5 GBP 30-day plan with 5 GB, 1,000 UK minutes/texts, and a UK number.

For the digital nomad (1+ months): Roami mid-term data plan with auto-network switching as primary connection — useful when Airbnb WiFi is unreliable — paired with a giffgaff goodybag (from 10 GBP) for a UK number. Total cost: roughly 30-50 GBP per month depending on data needs. For the contract, monthly and no-credit-check options that matter past 90 days, see our UK eSIM for long stays and students guide. The auto-carrier switching from Roami is a real advantage for Zoom or Teams calls because some UK networks throttle video streaming.

Travellers running this configuration on long London stays tend to keep it: the Roami line takes the Zoom calls and streaming, and the giffgaff line quietly does its one job — receiving bank SMS codes reliably. It’s a division of labour that holds up in extended real-world use.

For the student (semester or year): Standard UK plan from giffgaff, Vodafone, or EE. Your student accommodation has Wi-Fi, so mobile data needs are lower. The priority is a reliable UK number for university communications, banking, and NHS registration. Student deals: check UNiDAYS and each provider’s student page before committing — the extras (streaming subscriptions, bonus data) change frequently, so verify what’s currently on offer.

For business travellers: Roami data plan for reliable connectivity across UK cities (auto-switching means you never think about networks) plus your existing business phone on roaming or dual SIM. Most business travellers find that as long as they have data, they’re fine — email, Slack, Teams, and Zoom all work over data.

For multi-country travellers (UK + Europe)

• Lebara: Includes EU roaming on most plans
• giffgaff: EU roaming included on goodybags (data capped within fair use — around 5 GB of your allowance)
• Roami: Multi-country Europe plans covering UK + EU countries with auto carrier switching

The giffgaff EU roaming fair-use cap is worth noting: you can use around 5 GB of your allowance in the EU, which is plenty for maps and messaging but worth watching on a long trip.

See the UK eSIM multi-country Europe guide for full details.

For families and groups

• Parents: Roami data plans for reliable connectivity with auto carrier switching
• Kids: Data-only plans — they don’t need UK phone numbers (WhatsApp or FaceTime over data works)
• Shared device: Separate data-only plan for a family tablet or hotspot device

Use promo code web20 for 20% off your first plan — and if anyone in the family is new to Roami, start with the free eSIM trial (100MB of data, no payment needed) before buying. For a family of four, that adds up to meaningful savings.

Just pick one. The hybrid Roami + giffgaff setup offers the best combination of data performance and SMS capability. If you try it and find managing two lines cumbersome, fall back to giffgaff alone. Either way, don’t land in the UK without a plan — the airport kiosks will charge you 3x for half the data.

If you are still choosing a data plan, the UK eSIM overview covers that side of the decision.

Where to go next:

• Coverage data — the UK eSIM coverage guide breaks signal down by region and network.
• Network comparisons — the UK eSIM ranking ranks providers against each other.
• Device support — the device compatibility hub lists eSIM-ready handsets.

Whether you need a UK travel eSIM with phone number for SMS verification or a data-only option for light browsing, matching your plan to your actual needs saves money and frustration.

The GSMA publishes the eSIM technical standards, and giffgaff’s help centre documents exactly when a UK prepaid number is deactivated for inactivity. For a full list of eSIM-ready handsets, see our device compatibility hub.