Forget the hassle of a tiny physical SIM, eSIMs can make switching much easier…
Remember when changing phones meant having to switch out your tiny plastic SIM card from the old device to the new one, handling it so delicately and inserting with such precision so as to not damage or, lord forbid, drop it and lose it forever in the carpet or down a crack in the floor.
Maybe you’re a traditionalist (like myself) who still operates like that, but since 2016, there has been a new technology that makes the switching of phones process much easier and eliminates the need for a physical SIM card.
If you haven’t met already, today you’re going to be introduced to eSIMs – a brilliant way to connect to your mobile network without the need of a physical card.
We’re going to look into the key details you will want to know about eSIMs, including what exactly they are, how they differ from standard SIM cards, how to activate an eSIM and more.
What is an eSIM?
An eSIM, short for “embedded SIM,” works just like a traditional SIM card in that it stores your mobile network information and allows your device to connect to your chosen providers’ network.
The difference between an eSIM and a standard SIM card is that eSIMs are built directly into your device’s hardware, so there’s no need to insert or swap a plastic card.
Because eSIMs can be activated and reprogrammed digitally, you can change plans or providers more quickly and conveniently, often without needing to visit a shop or wait for a SIM card in the post.
How does an eSIM work?
An eSIM works via a digital profile that is set up by your network provider. It’s not a full-on form or process or anything like that, it’s simply a software-based representation of your mobile network subscription containing all the information of your chosen plan with that provider that is needed to connect your phone to the providers’ cellular network.
Devices with eSIM technology will have the embedded SIM chip permanently built within the device, meaning the process is done via a download over the air.
Downloading your eSIM from one phone to another is as easy as scanning a QR code or following the on-screen instructions when setting up your new device. Once its setup, it is ready to go right away.
Benefits of an eSIM
Switching to an eSIM brings more than just the removal of a plastic card. From added convenience to greater flexibility, eSIMs make it easier to manage your mobile plan and stay connected wherever you are.
Let’s take a look at some of the main benefits of an eSIM compared to a standard plastic SIM card:
- Convenience – Quick and easy installation means no need to wait for a SIM card in the post or visit a store. Plans can be activated digitally in minutes.
- Flexibility – Switching between plans or even providers without physically swapping cards makes for a much easier and streamlined process – ideal if you find a better deal.
- Travel-friendly – Add a local data plan when abroad without removing your existing SIM, helping you avoid roaming costs and the potential of misplacing your normal SIM card when you get back home.
- Space-saving – With no SIM tray needed, device manufacturers have more room for bigger batteries or other features.
- Security – eSIMs can’t be lost or stolen like physical SIM cards, reducing the risk of misuse if your phone goes missing. Also, the fact they can’t be removed means the possibility of disabling tracking features is eliminated, helping you to track down your device easier if it is lost or stolen.
Sustainability – By cutting down on plastic SIM cards and packaging, eSIMs help reduce environmental waste.
Can you keep your old number with an eSIM?
Yes, you absolutely can. If your main worry with changing from an SIM card to an eSIM is that you’re going to lose your number, and with that all your contacts stored within the SIM card, then you have nothing to worry about.
What’s more, you don’t have to wait until you get a new phone to choose to move to an eSIM. With most providers, you can contact them to request an eSIM QR code which you then scan on your device to get setup.
Remember to check that your phone does have eSIM compatibility.
How to tell if your phone is eSIM compatible
Checking to see if your device is eSIM compatible is very simple and there are a couple of ways to do so.
Probably the easiest way to check is by dialing *#06# on your phone’s dial pad. You’re not actually having to call anyone, all this does is bring up various codes and numbers for your phone, such as your IMEI (which is used to identify the device) and, most importantly for an eSIM, the EID number (eSIM unique identification number).
So long as that number is shown on screen, you can be sure that your phone supports eSIM technology.
There are other ways to do so by going into your phones settings, but truth be told the other easiest way to check is by searching on Google for your device model or going to the manufacturers website and finding the model.
Is an eSIM better than a standard SIM card?
That largely depends on your preference. The benefits have been listed already so it’s up to you to decide whether you think eSIMs hold real meaningful benefits over physical SIM cards.
In our opinion, the convenience of an eSIM partnered with the better security makes an eSIM a better option, although sometimes you can’t go wrong with the classic.
eSIMs on different providers
The four main network providers in the UK, known as the “Big Four”, consist of O2, Vodafone, Three and EE. All four have introduced eSIMs in the past few years, but each have suffered from various teething problems.
Three
Three had the most torrid time on their original launch in 2020, experiencing a “botched” launch where they suffered from all kinds of technical failures, delays and ultimately poor customer service.
They had a better relaunch in 2023 and have offered the service with minimal issues (none that aren’t shared between providers).
Three offers eSIMs to customers on its Three Your Way plans (three types of plans; Lite, Value and Complete) as well as those on Pay As You Go.
For new customers choosing a Three Your Way plans, you’ll be given the option to select an eSIM when placing your order. For existing customers, you can switch to an eSIM by calling Three or popping into a store.
Pay As You Go customers also need to take the same route, going in store or calling up to acquire an eSIM.
O2
O2 were the first of the “Big Four” to offer eSIM support, doing so in 2019. They offer eSIMs only on Pay Monthly and business plans, and getting one is as simple as choosing the option at checkout or by switching through existing customers’ My O2 account online
Vodafone
Vodafone launched eSIMs for applicable devices in 2020, starting with Pay Monthly customers only before expanding to Pay As You Go customers as well.
Once again, you can request an eSIM during checkout or you can switch to one by contacting Vodafone or via the My Vodafone app.
EE
EE was rather late to the game amongst the other “Big Four” members, only introducing eSIMs as an option in 2024.
Acquiring an eSIM from EE can be done in multiple simple ways. You can request one on checkout for new customers, while existing customers can either head into an EE store, order one via the EE app, or can call 150 from their EE phone to request one.
Other providers
Many other providers in the UK also offer eSIMs, with the likes of Giffgaff, iD Mobile, VOXI and Sky Mobile are amongst some of the top alternate providers outside the “Big Four” who offer them.
Again, each provider is different in how you can get an eSIM, with most allowing you to choose the option upon checkout, or for existing customers it will likely be a matter of contacting the provider or using their app.
Be sure to check what each provider offers for their eSIMs to check your device is applicable.
How to activate an eSIM on iPhone
Apple has supported eSIM since the iPhone XS, and the setup is designed to be quick and straightforward. To activate an eSIM:
- Go to Settings > Mobile Data (or Cellular).
- Tap Add eSIM (or Add Mobile Plan).
- Scan the QR code provided by your carrier, use their app, or follow the on-screen instructions if they sent you an activation code.
- Once confirmed, choose whether you want this plan to be your primary line (for calls, texts, and data) or a secondary line (handy if you want a personal and business number on the same phone).
How to activate an eSIM on Android
Android steps vary depending on the brand, but the process is broadly similar. On most modern devices:
- Go to Settings > Connections > SIM manager (Samsung) or Settings > Network & Internet > Mobile Network (Pixel and others).
- Look for Add Mobile Plan or Add eSIM.
- Scan your carrier’s QR code, use their app, or enter details manually if provided.
- Confirm activation and select whether the eSIM should handle calls, texts, data, or all three.
Tip: Some Android phones let you use both a physical SIM and an eSIM at the same time (dual SIM), which can be useful if you want to keep your main number active while using a local eSIM abroad.
What is the best eSIM for travel?
The best eSIM for travel often depends on where you’re going and how you plan to use your phone. You have these main options:
- Carrier eSIM plans – Some UK networks (like EE, O2, and Vodafone) let you add international roaming packs to your existing eSIM. This can be convenient but may still be costly depending on the destination.
- Global eSIM providers – Companies like Airalo, Holafly, and Nomad offer prepaid eSIM data packages for hundreds of countries. These can be downloaded instantly and often save you money compared to roaming with your home carrier.
- Local eSIMs – In some countries, you can buy a local eSIM plan from a native carrier, usually at lower rates than international options.
Genius Tip: For frequent travellers, global eSIM apps are usually the most flexible choice, while local eSIMs are great if you’re staying in one country for a longer period.
