United Kingdom eSIM

Stay connected with a Cellesim eSIM for the United Kingdom. This digital SIM card provides you with mobile data directly on your phone, so you can navigate maps, use apps, and browse the internet from the moment you arrive. Forget about finding a local SIM card shop; install your plan before you leave and activate it upon landing. Plans start from $3.49.

🏙️ London

Selecting the right data plan depends on the length of your stay and how much you plan to use your phone. We offer a variety of options to match different travel styles, from short city breaks to extended tours.

• Short Trips and Light Use: If you're visiting for a few days, perhaps for a weekend in London or Edinburgh, and mainly need data for maps and messaging, smaller packages like 1 GB or 3 GB are suitable. We have validity periods of 1, 5, and 7 days that fit these shorter itineraries.
• Week-Long Stays: For trips around a week to 15 days, where you might be streaming some music or sharing photos more frequently, consider plans with 5 GB or 10 GB of data. These provide a comfortable buffer for daily use without worrying about running out.
• Longer Stays and Heavy Use: If you are staying for a month or longer, or if you are a heavy data user who relies on your phone for work, streaming video, or frequent social media uploads, our larger data packages of 20 GB, 50 GB, or even an unlimited plan are the best fit. These plans are available with 30-day and 180-day validity options. For the unlimited plan, please note that after a certain amount of high-speed data is used, the connection speed is reduced for the remainder of the period, but you will not be cut off.

All our eSIM packages for the United Kingdom are data-only. This means they do not come with a phone number for traditional calls or SMS.

Your eSIM will connect to the UK's leading local mobile networks to provide reliable coverage. Depending on your location, your device will automatically switch to the strongest available signal from providers including 3 (Three UK), EE, O2, and Vodafone UK.

You can expect strong and consistent coverage in major cities and towns like London, Manchester, Birmingham, Glasgow, and Cardiff. In more remote and rural areas, such as the Scottish Highlands, the Lake District, coastal regions of Wales, or smaller islands, mobile signal can be intermittent. Service may also be limited inside some buildings or on underground transport systems. For voice calls and messaging, you can use internet-based applications like WhatsApp, FaceTime, Telegram, or Skype over your data connection.

To get the most out of your eSIM, keep these tips in mind. Public Wi-Fi is widely available in cafes, pubs, hotels, and on public transport networks like the London Underground, which can help you conserve your mobile data allowance. When you use your Cellesim eSIM for data, you can keep your primary SIM active for receiving calls and texts on your home number, if your device supports it. Apps like WhatsApp, iMessage, and other messaging services will continue to work with your existing number, so you can stay in touch with contacts back home without any changes.

Setting up your eSIM is a straightforward process that takes just a few minutes. Follow these steps for a smooth activation:

• Step 1: Install Before You Travel. After purchase, you will receive a QR code. Scan this code with your phone while you are connected to a stable Wi-Fi network at home to install the eSIM profile.
• Step 2: Activate Upon Arrival. When you land in the United Kingdom, open your phone's settings. Turn on the line for your Cellesim eSIM and make sure to enable 'Data Roaming' for it.
• Step 3: Check Your Plan Details. The validity period of your eSIM may begin upon installation or when it first connects to a network in the UK. Always refer to the specific details of your purchased plan to confirm when it starts.

Yes, our United Kingdom eSIM provides coverage across the entire country, including London and all other major cities. It is compatible with any eSIM-enabled device, such as recent iPhone and Android models.

You can purchase your UK eSIM plan directly from our website. After completing your purchase, the eSIM details and QR code for installation will be sent to your email immediately.

Yes, all our eSIM plans for the UK are for mobile data only. They do not include a phone number for making traditional voice calls or sending SMS messages. You can use apps like WhatsApp or Skype for your calls.

🧭 Related eSIM destinations: eSIM Ireland · eSIM France · eSIM Netherlands

🌍 Visiting more than one country? eSIM Europe

Since Brexit, roaming rules have changed for many travelers. Your home carrier might now charge high daily fees for using data in England and the rest of the UK. Don't let expensive roaming charges ruin your holiday. A local eSIM is the smartest way to get affordable data without swapping physical SIM cards.

Stay online across the UK with one eSIM — see our Commonwealth Games 2026 eSIM guide.