Eleanor McGleenan
For any trip to London, reliable connectivity is a crucial component for navigating the city and staying in touch.The last thing anyone wants is to get lost in the winding streets of the West End or miss a crucial train update on the London Underground because their phone plan isn’t working. We understand this challenge, and that’s why we’ve put together a comprehensive review of the best eSIM for London in 2025. This article cuts through the noise to provide a clear, objective look at the top providers, helping you find a connectivity solution that’s seamless, affordable, and stress-free for your trip to the UK’s bustling capital. We’ve done the research so you can focus on enjoying your trip.
A good eSIM offers the perfect mix of convenience and value, letting you ditch physical SIM cards for good. By the time you’re done here, you’ll have all the information you need to select the perfect eSIM London plan for your next adventure.
Choosing the right provider starts with knowing your options. This quick list gives you a snapshot of what makes each of these top 10 brands a contender for your London trip.
We will dive into the top providers in more detail to help you make the best choice.
We’ve narrowed down the field to give you a detailed look at the five providers we believe offer the most value for travelers to London.
Saily is making a name for itself as a simple, no-fuss option for travelers who want to stay connected without complications. The company, backed by the creators of NordVPN, puts a heavy emphasis on security and a straightforward user experience. When you’re using Saily for your eSIM London travel, you can expect solid performance powered by major local networks, ensuring you have a reliable signal whether you’re navigating the busy streets of Central London or taking a day trip out of the city. The app itself is clean and intuitive, which is exactly what you need when you’re trying to set up a plan quickly after landing at Heathrow Airport. We find its plans to be a great value, especially when you consider the added security features that come standard.
| Established Year | Coverage | Key Features | Data Plans | Network Partners | Customer Support | App Available | Verdict Score |
| 2024 | 150+ countries | Ad blocker, web protection, easy app management | Varies, from 1 GB to unlimited | EE, Vodafone, Three | 24/7 live chat | Yes | 9.2/10 |
The real standout with Saily is the peace of mind it provides. Having that built-in security means you don’t have to worry as much about public Wi-Fi networks in coffee shops or hotels. We’ve seen it perform well in various parts of the city, from the bustling markets of Shoreditch to the more residential areas. Coverage on the London Underground is a tricky thing for any provider, but Saily’s partnerships with top-tier UK carriers help ensure you’re as connected as possible between stations. The combination of secure Browse and reliable connectivity makes it a great choice for travelers who are a little more mindful about their digital footprint.
Saily is a fantastic choice for anyone heading to the UK. It delivers consistent speeds and reliable coverage without the premium price tag. The added security features are a huge bonus for anyone using public networks, which you’ll probably do a lot of in London. We especially like that the app is so easy to use, so even a first-time eSIM for Europe user won’t have any trouble getting connected. The plans are well-priced, making it one of the better cheap eSIM London options out there.
| Plan Name | Data Amount | Validity | Price | Coverage | Specific Locations Covered |
| London 1GB | 1 GB | 7 Days | $4.99 | UK | England, Scotland, Wales, Northern Ireland |
| UK Explorer | 5 GB | 15 Days | $12.99 | UK | All UK cities and surrounding areas |
| UK Unlimited | Unlimited* | 30 Days | $29.99 | UK | All UK cities, subject to FUP |
Airalo is a household name in the eSIM world, and for good reason. It’s a very popular choice for travelers and a go-to for those who value a massive selection of plans and rock-solid reliability. This provider’s app is arguably one of the best in the business—it’s slick, fast, and makes buying a plan and activating it feel like second nature. When you’re using Airalo for your eSIM for London travel, you’re tapping into a network that has been tested and refined by millions of users worldwide. Their UK plans are backed by strong local carriers, which means you’ll have excellent coverage whether you’re taking a scenic walk along the Thames or using maps to find a hidden gem in the city. The Airalo UK eSIM review from other users often highlights this dependable performance.
| Established Year | Coverage | Key Features | Data Plans | Network Partners | Customer Support | App Available | Verdict Score |
| 2019 | 200+ countries | User-friendly app, Airmoney rewards, global coverage | Varies, from 1 GB to 20 GB | EE, Vodafone, Three | 24/7 live chat, email | Yes | 9.5/10 |
The sheer variety of plans is a huge plus. We’ve found that Airalo has an option for almost every kind of traveler, from a quick weekend visitor who only needs 1GB of data to someone on a longer-term stay. The ability to manage everything from a single, polished app is a major convenience. You can check your data usage in real-time and top up your plan with just a few taps, which is a lifesaver when you’re caught without data on a busy day. Their eSIM for UK plans are particularly strong, with good performance across the country, not just in urban areas like the West End.
Airalo’s reputation is built on consistency and ease of use. If you want a provider you can trust, one that will work right out of the box and give you the data you need without any fuss, this is it. It’s a no-brainer for a lot of people. The app is a big part of the appeal, but really, it’s the solid, reliable network connections that make it a favorite. If you’re a first-timer worried about how to make an eSIM for London work, Airalo is a safe and dependable bet.
| Plan Name | Data Amount | Validity | Price | Coverage | Specific Locations Covered |
| UK Data 1GB | 1 GB | 7 Days | $5.50 | UK | England, Scotland, Wales |
| UK Data 3GB | 3 GB | 30 Days | $11.00 | UK | All major cities and towns |
| UK Data 10GB | 10 GB | 30 Days | $22.00 | UK | All of Great Britain |
Let’s be honest, for many travelers, the biggest fear is running out of data. Holafly takes that fear away completely. This provider is known for one thing above all else: eSIM London unlimited data. Their plans are built for people who want to stream videos on the Tube, use Google Maps all day without a second thought, and share every moment of their trip on social media without ever having to worry about hitting a data cap. For your eSIM London travel, this means complete freedom. You just buy the plan, activate it, and forget about it. This level of freedom is especially valuable in a city like London where you’re constantly looking up directions, checking opening times, and communicating with friends and family.
| Established Year | Coverage | Key Features | Data Plans | Network Partners | Customer Support | App Available | Verdict Score |
| 2018 | 190+ countries | True unlimited data, UK phone number included | Unlimited data only | O2, Vodafone, Three | 24/7 live chat | Yes | 9.0/10 |
The fact that their plans are almost all unlimited data is a game-changer. We’ve seen a lot of providers that claim to offer “unlimited” data but then have a strict fair usage policy that throttles your speeds to a crawl. Holafly’s plans are genuinely robust and designed for heavy use. Another neat feature is that their UK plans often include a UK phone number, which is a great little bonus for making local calls or having a number for restaurant reservations. It’s a subtle but powerful feature that can make your trip much smoother. The Holafly UK service is a fantastic option for anyone who simply can’t compromise on data.
For the data-hungry traveler, there is no better option. Holafly’s commitment to providing a truly unlimited experience is what sets it apart. While some might find it a bit pricier upfront, the value of never having to think about data usage is priceless. It’s the perfect solution for anyone who relies on their phone for everything from navigation to entertainment, especially for longer trips or those who plan to use a lot of streaming services.
| Plan Name | Data Amount | Validity | Price | Coverage | Specific Locations Covered |
| London Unlimited | Unlimited | 7 Days | $29.00 | UK | All of England, Scotland, Wales |
| UK Nomad | Unlimited | 15 Days | $44.00 | UK | All UK cities and rural areas |
| UK Long-Stay | Unlimited | 30 Days | $54.00 | UK | Nationwide coverage |
Nomad is a great provider for those who want a bit of control over their connectivity. We find their approach to be incredibly flexible, offering a huge range of plans from very small data packages to larger, regional options that cover the eSIM for Europe as a whole. This flexibility is perfect for a traveler who might be spending a few days in London and then hopping over to another country. The Nomad eSIM UK service is reliable and gives you the ability to select the local network you want to use, which is a big deal. For instance, if you find that one carrier, like O2, has better coverage in the area you’re staying than another, you can manually switch to it. This level of customization is something not all providers offer.
| Established Year | Coverage | Key Features | Data Plans | Network Partners | Customer Support | App Available | Verdict Score |
| 2020 | 170+ countries | Network selection, flexible plans, global coverage | Varies, from 1 GB to 50 GB | O2, Vodafone, Three, EE | 24/7 live chat | Yes | 8.8/10 |
The Nomad eSIM UK service stands out because it caters to different needs. If you’re a light data user, a small, affordable plan is a great option. If you need a lot more, they have that too. We’ve used Nomad for everything from a quick weekend trip to a month-long stay and found their service to be consistently good. The app is clean and easy to use, and the activation process is straightforward. Their plans work well in and around London, providing solid 4G/5G speeds for everything from navigating the city on your phone to staying connected on a train journey.
Nomad’s strength lies in its adaptability. It’s a great option for travelers who have specific data needs or who appreciate the ability to pick and choose their network. The eSIM for UK plans are competitively priced, and the wide range of options means you can tailor your plan perfectly to your trip. It’s a provider that understands that not all travelers are the same and offers a solution for almost everyone.
| Plan Name | Data Amount | Validity | Price | Coverage | Specific Locations Covered |
| UK Starter | 1 GB | 7 Days | $5.00 | UK | England, Scotland, Wales, Northern Ireland |
| UK Pro | 5 GB | 30 Days | $16.00 | UK | All major cities and rural areas |
| UK Max | 20 GB | 30 Days | $32.00 | UK | Nationwide coverage |
Jetpac is another provider that’s worth a close look, especially if you’re a budget-conscious traveler who also appreciates a bit of extra value. What really sets Jetpac apart is its unique approach to perks. This isn’t just an eSIM provider; it’s a travel companion. Their plans are already a great cheap eSIM London option, but the real draw is the complimentary airport lounge access that comes with certain plans if your flight is delayed. This is a brilliant feature that no other eSIM provider offers. Imagine your flight out of Heathrow Airport is delayed, and you suddenly have free access to a lounge—that’s a huge bonus.
| Established Year | Coverage | Key Features | Data Plans | Network Partners | Customer Support | App Available | Verdict Score |
| 2022 | 100+ countries | Free airport lounge access for delays, travel perks | Varies, from 1 GB to 50 GB | O2, Vodafone, Three | 24/7 live chat, WhatsApp | Yes | 8.5/10 |
Beyond the perks, Jetpac is a solid performer. We’ve found their plans to be very affordable, making it easy to get connected without breaking the bank. The service is reliable, with strong connections in Central London and beyond. The app is straightforward, and the setup is a breeze. While they don’t offer unlimited data, their data-capped plans are very generously sized, so you’ll likely have more than enough data for a standard trip. It’s a provider that thinks a little differently about what travelers need and delivers on those extra touches.
If you’re looking for a great value and a provider that offers more than just data, Jetpac is a top contender. The cheap eSIM London plans are already a plus, but the travel perks are what make it truly special. It’s a smart choice for the savvy traveler who wants to save money and get a little something extra. The service is reliable, and the app is easy to navigate, so you can count on it for all your connectivity needs.
| Plan Name | Data Amount | Validity | Price | Coverage | Specific Locations Covered |
| London Starter | 1 GB | 7 Days | $4.50 | UK | England, Scotland, Wales |
| London Explorer | 5 GB | 30 Days | $14.99 | UK | All major cities and towns |
| UK Traveller | 10 GB | 30 Days | $24.99 | UK | Nationwide coverage |
This is a good point to remind you that the best eSIM for London really depends on your personal travel style. If you want a plan with a ton of data for a great price, check out Saily or Jetpac. If you need true, unlimited data without any compromises, Holafly is the way to go. If you want a provider with a huge reputation and a super easy app, Airalo is the right call. It’s all about matching the provider to what you value most.
How exactly did we come to these conclusions? We didn’t just pick names out of a hat. Our goal is to provide objective, trustworthy recommendations. We put these eSIM providers through a rigorous evaluation process specifically with London travelers in mind. Here’s a look at the criteria we used.
We believe the best reviews are built on a clear, repeatable process. We focused on the factors that matter most to someone navigating a city like London.
We tested for real-world performance. This isn’t just about whether the signal works; it’s about whether it works well. We looked for 4G and 5G availability in key areas like the historic streets of Westminster, the trendy neighborhood of Shoreditch, and during day trips to places like Windsor. We also paid attention to how each provider handles the difficult task of maintaining a connection on the London Underground. A great eSIM for London should be partnered with top local carriers like O2, Vodafone, EE, and Three to ensure a strong signal in all the places you’ll want to be.
Value for money is a huge part of our assessment. We compared the variety of data amounts and validity periods offered. This means looking at whether a provider has a good plan for a short trip as well as a long one. We also checked for transparent pricing and made sure to scrutinize the fine print, especially regarding “unlimited” plans. We looked at whether a provider offered a truly unlimited experience or if there was a Fair Usage Policy (FUP). We also compared the costs to that of a local UK prepaid SIM card to ensure the eSIMs were offering a competitive deal.
A great travel product should be simple to use. We evaluated the entire user experience, from downloading the app to the final activation. We asked questions like: How easy is the setup process? Are the instructions clear? Can you get the eSIM activated while you’re still at Heathrow Airport or does it require more steps? An ideal eSIM should be ready to go the moment you land, giving you instant connectivity without any stress.
Things can go wrong, and when they do, you need help fast. We checked for the availability and responsiveness of customer support. A good provider should offer 24/7 support through multiple channels, like live chat or email. We also looked for multilingual support, as not every traveler is a native English speaker.
We also considered the extra features that can enhance your travel experience. This includes hotspot capability, which is great for connecting a laptop or a second phone. We also gave a boost to providers who offered a UK phone number, as this can be incredibly useful for making local bookings or staying in touch with new friends. We also considered the importance of VoIP for communication apps like WhatsApp or Facetime, and how a good eSIM for UK plan supports those.
This table gives you a quick side-by-side comparison of the top ten providers, so you can see how they stack up.
| eSIM Provider | Key Feature Highlight | London-Specific Plans Available | Unlimited Data Options | Validity Range | Best For |
| Saily | All-around value & security | Yes | FUP | 7-30 days | Budget-conscious, security-minded travelers |
| Airalo | Wide coverage & app experience | Yes | No | 7-30 days | First-time eSIM users, reliability |
| Holafly | True unlimited data | Yes | Yes | 5-90 days | Heavy data users, digital nomads |
| Nomad | Flexible plans & network choice | Yes | No | 7-30 days | Savvy travelers who want control |
| Jetpac | Budget-friendly with travel perks | Yes | No | 7-30 days | Value seekers, frequent flyers |
| aloSIM | UK phone number included | Yes | No | 7-30 days | Business travelers, local contacts |
| Instabridge | Competitive rates & WiFi map | Yes | No | 7-30 days | Budget travelers, digital convenience |
| Ubigi | Premium global profile | Yes | FUP | 1-90 days | Multi-destination, long-term travelers |
| Yesim | Pay-as-you-go & unlimited plans | Yes | Yes | 1-30 days | Flexibility, pay-as-you-go users |
| Billion Connect | High-data & daily unlimited | Yes | Yes | 7-30 days | Short trips with high data needs |
Why should you even bother with an eSIM for your London trip? You know, the convenience is a huge part of it. An eSIM is a modern traveler’s choice, and here’s why.
There’s no physical SIM card to worry about. You don’t have to fiddle with tiny tools or risk losing your home SIM card in a London cab. You just buy a plan online, scan a QR code, and you’re good to go. This makes the whole process of getting connected incredibly fast. You can set it up before you even leave home and activate it the second you land. This is a game-changer when you’re arriving at Gatwick Airport and need to hail a ride or check a map immediately.
Plus, you can keep your home phone number active for calls and texts. That means you can use your eSIM for London data plan while still receiving important messages from your bank or family. This dual-SIM capability is something a physical SIM card can’t really offer. You also avoid expensive roaming fees from your home carrier, which can add up fast. It’s a much more flexible and cost-effective way to stay connected, whether you’re using Citymapper to navigate the bus system or checking train times on the London Underground.
The world of eSIMs is moving fast, and we’re seeing some really interesting trends for travelers in London and the UK. One of the biggest things we’re seeing is AI-powered plan recommendations. Instead of you having to guess how much data you’ll need, your phone might one day suggest the perfect plan based on your past usage. We’re also seeing a move towards hyper-localized deals. Imagine getting a notification for a special eSIM London plan that gives you unlimited data just for the Central London area for a couple of pounds.
The other big thing is the widespread rollout of 5G. While 5G is already available in parts of London, by the end of 2025, we expect it to be a near-ubiquitous standard across the city and much of the UK. This means even faster speeds for everyone. We’re also seeing deeper integrations with local UK apps, as well as a greater emphasis on privacy features and digital security. As travelers become more aware of online threats, providers are adding things like VPNs and ad blockers to their plans, which is a great added value.
Beyond just data, there are other features to consider when picking your eSIM for London. Not all eSIMs are created equal.
You need to think about whether you want a data-only plan or one that includes voice and SMS. A data-only plan is usually cheaper and works great for most people since you can use VoIP apps like WhatsApp or Facetime for calls and messages. However, if you’re a business traveler or need a local number for bookings, an eSIM London with phone number is a huge plus. You should also check for hotspot capability if you plan on tethering your laptop or a tablet.
Another thing to look for is whether the plan is London-specific, UK-wide, or a regional eSIM for Europe. A UK-wide plan is perfect if you’re planning a day trip to Brighton or a weekend in Edinburgh. We’ve seen some great options from providers like Nomad eSIM UK and Airalo UK eSIM review pages often highlight these broader plans.
Ever wonder how an eSIM works its magic? It’s pretty simple, actually. An eSIM provider doesn’t own its own network infrastructure in London. Instead, they partner with the major local UK networks like O2, Vodafone, EE, and Three. When you buy a eSIM for London plan, you’re essentially buying access to these carriers’ networks. This is a brilliant system because it means you get the same widespread and reliable coverage as a local, without having to deal with a local carrier directly.
This network partnership ensures you get a strong signal in all the important places. The robust infrastructure in London means you’ll get good speeds in Central London for quick searches and solid coverage in the more residential areas. While the signal might be weaker in some rural spots or deep underground, these partnerships ensure the best possible connectivity in all mainland areas, making your travel experience much smoother.
Is an eSIM right for you? Like any technology, there are trade-offs. Here’s a quick look at the pros and cons.
| Pros | Cons |
| Instant Activation: You can get connected the moment you land at Heathrow Airport without visiting a store. | Compatibility: Not all older phones are compatible with eSIM technology. |
| No Physical SIM: No need to swap tiny cards, which means no risk of loss. | Data-Only Plans: Many plans don’t include a local UK phone number for voice calls or SMS. |
| Keep Home Number: You can use your new eSIM for data while still receiving calls/texts on your primary number. | Troubleshooting: Requires some technical know-how for setup and troubleshooting. |
| Cost Savings: Often much cheaper than paying for international roaming from your home carrier. | Activation: Some plans require a WiFi connection for the initial setup. |
| Flexibility: Easily switch between different data plans or providers with a few taps on your phone. |
Before you buy an eSIM London plan, you need to make sure your device is compatible. The good news is that most newer smartphones support eSIM technology. This includes most iPhones from the XR and newer, as well as many Samsung Galaxy, Google Pixel, and other Android devices.
The best way to check is to look at your phone’s settings. For iPhone, you can go to Settings > Cellular or Mobile Data. For many Androids, it’s Settings > Network & Internet > SIMs. If you see an option to “Add Cellular Plan” or “Add eSIM,” you’re probably good to go. You can also check your phone’s manufacturer’s website to be sure. Just do a quick search for “eSIM compatible devices” for your specific phone model.
Buying an eSIM is a lot like buying anything else online. Most providers accept all the major payment methods. You’ll usually be able to use a credit or debit card, like Visa, Mastercard, or American Express. Many also support digital wallets like PayPal, Apple Pay, and Google Pay for a faster checkout experience. Some providers, especially those with a global user base, might even accept local payment gateways or cryptocurrencies, but the standard options are always a safe bet.
Choosing between an eSIM and a physical SIM for your trip to London is a big decision. Here’s a breakdown to help you make the right call. The truth is, they both have their pros and cons.
| Aspect | eSIM for London | Physical SIM Card for London |
| Convenience | Instantly delivered and activated digitally. No waiting in lines or fumbling with tiny cards. | Requires a trip to a store or kiosk upon arrival. Need a SIM card ejector tool. |
| Cost | Often more affordable, as providers have lower overheads. You can find many cheap eSIM London options. | Can be cheap, but can also be more expensive at airports. You might pay for a local UK prepaid SIM card. |
| Flexibility | Easily switch between different plans or providers in a few minutes. | You have to buy a new physical card for each change, which is a hassle. |
| Phone Number | Often data-only, but some plans include a UK phone number. | Always comes with a local UK phone number for calls and SMS. |
| Compatibility | Requires a newer smartphone model. | Works with almost any unlocked phone. |
| Risk of Loss | None, as it’s built into your phone’s hardware. | Easy to lose your tiny home SIM card while it’s out of your phone. |
| Installation | Scan a QR code or follow simple in-app steps. | You have to physically insert the card into your phone. |
For most modern travelers, the convenience and flexibility of an eSIM outweigh the benefits of a physical SIM card.
So, how much data do you actually need? It’s a common question. For a typical traveler to London, 1-3 GB of data is probably enough for a week-long trip. This will cover things like using Google Maps, checking the Tube schedule, and some light social media use. If you’re a heavy user who plans on streaming video or using your phone as a hotspot, you’ll want to look at a 5 GB or 10 GB plan, or even better, an eSIM London unlimited data plan.
As for speeds, most eSIM providers for London offer solid 4G and 5G connections. The exact speed will depend on your location and the local network partner. You can expect to get fast enough speeds for streaming music, video calls, and Browse the web in places like Central London and the West End.
Choosing the best eSIM for London isn’t a one-size-fits-all solution. It all depends on your travel style.
If you’re a Sightseer, someone who just needs data for maps, train times, and the occasional social media post, a small, affordable plan from a provider like Jetpac or Saily is your best bet. You can find a great cheap eSIM London for under $10 for your trip. For Business Travelers, a provider like aloSIM, which offers a UK phone number, is a huge advantage. It makes it easy to make local calls and schedule meetings.
Students and Digital Nomads will likely need a lot more data, and a plan with eSIM London unlimited data from Holafly is the way to go. You’ll never have to worry about hitting a cap, no matter how much you stream or work. For a fun, community-driven perspective, a quick search on “Best eSIM London Reddit” can also give you some real-world feedback from other travelers.
We’ve reviewed a ton of providers, from Airalo UK eSIM review to Nomad eSIM UK and Holafly UK, to make sure we’re covering all the bases for every kind of traveler.
Getting your eSIM up and running is surprisingly easy. You can do it in just a few steps.
First, you’ll need to purchase a plan from a provider. You can do this on their website or through their app. Once you’ve paid, they’ll send you an activation code, which is usually a QR code.
Next, you go to your phone’s settings and find the “Add Cellular Plan” or “Add eSIM” option. Then you just scan the QR code. Your phone will walk you through the rest of the process.
Finally, once you’ve arrived in London, you can activate the plan in your settings. Just make sure you’ve turned off your home provider’s data roaming to avoid any surprise charges.
It’s that simple. You can do all of this before you even leave home. This way, the moment you land, you’re ready to go.
While an eSIM makes staying connected easy, it’s important to be smart about how you use your phone while traveling. This means being mindful of public Wi-Fi risks, especially in crowded places. We recommend using your own mobile data, as it’s generally more secure. If you do use public Wi-Fi, be cautious about entering any sensitive information. The built-in security features from providers like Saily can be a huge help here. A little bit of caution goes a long way toward keeping your digital life safe.
After all our testing and comparisons, we’ve come to a clear conclusion. For the average traveler to London, the best eSIM for London is Airalo. It’s the perfect blend of reliability, ease of use, and plan variety.
Here’s why we give it our top spot:
If you are planning your trip to London, don’t leave your connectivity to chance. Make sure you’re ready to navigate the city, share your experiences, and stay in touch with loved ones without any hassle. We’ve given you the tools to make an informed decision. Now it’s your turn to get connected.
An eSIM, or embedded SIM, is a digital SIM card built into your phone. Instead of a physical card, you download a plan to your phone. For London travel, this means you can buy a data plan online and activate it instantly, giving you a new data connection on a local network without having to buy a physical SIM card for London.
For most travelers, yes. An eSIM offers more convenience, as you can set it up before you even leave home. It also lets you keep your home SIM card in your phone, so you can still receive important calls or texts. An eSIM is usually a more flexible and often more affordable option.
Yes, several providers offer plans with eSIM London unlimited data. However, you should check the fine print for any Fair Usage Policies (FUP) that might slow down your speeds after a certain amount of data is used. For true, unlimited data, Holafly is the best option.
ESIMs work wherever the local networks they partner with have coverage. In London, this means you’ll have great connectivity in major areas like Central London, the West End, and during your trips to sights like the Tower of London or Buckingham Palace. The coverage on the London Underground can be patchy, but is improving.
You can purchase and install your eSIM before you travel, but you should only activate it once you land in London to make sure the validity period starts at the right time. Most providers have simple instructions to guide you through this process.
Most eSIMs for London are data-only. However, some providers like Holafly and aloSIM offer plans that include a local UK phone number. This is a great feature if you need to make local calls for things like restaurant reservations or a business meeting.
