An eSIM (embedded SIM) is a digital SIM card built directly into your device. Unlike a traditional physical SIM card, an eSIM cannot be removed or swapped manually — instead, it is programmed remotely by your mobile operator. This technology allows you to activate a mobile plan without visiting a store or waiting for a card to arrive in the post.
For UK residents and travellers, eSIM technology offers a flexible and convenient way to manage mobile connectivity. You can switch between operators, add data plans for international travel, and manage multiple numbers on a single device — all from your phone's settings menu.
This website is a comprehensive, independent information resource. We do not sell eSIM plans directly. Our goal is to help you understand how eSIM technology works, what to look for when choosing a plan, and how to get started with confidence.
Activate your mobile plan within minutes. No waiting for a SIM card to arrive — scan a QR code or enter an activation code and you are connected.
Store multiple operator profiles on one device. Switch between plans without physically changing a SIM card — ideal for separating personal and work numbers.
Add a local data plan before you land abroad. Avoid roaming charges by activating a destination-specific eSIM plan while keeping your UK number active.
| Feature | Typically Included | Typically Not Included |
|---|---|---|
| Data allowance | Yes – as per plan | Unlimited data not always available |
| UK calls & texts | Yes – most plans | International calls may cost extra |
| Roaming (EU) | Often included (check plan) | Non-EU roaming usually extra |
| Hotspot / tethering | Yes – on most plans | Some budget plans restrict tethering |
| Visual voicemail | Operator dependent | Not universally supported |
| Multiple profiles | Device dependent | Older devices may limit profiles |
| Plan switching | Yes – via settings | Simultaneous active plans limited |
| Emergency calls | Yes – always | N/A |
| 5G access | If plan & device support it | 4G-only plans exist |
| Number porting | Yes – request from operator | Instant porting not always possible |
| Contract flexibility | 30-day rolling options available | Annual contracts may have exit fees |
| Customer support | Online & phone support | In-store support varies by operator |
Most smartphones released after 2018 support eSIM. Check your device settings under "Mobile Data" or "SIM & Network" for an "Add eSIM" option. Apple iPhone XS and later, Google Pixel 3 and later, and Samsung Galaxy S20 and later all support eSIM.
Yes. You can port your existing number to an eSIM plan. Contact your new operator and provide your PAC (Porting Authorisation Code) from your current provider. The process typically takes one working day.
Contact your operator immediately to suspend your eSIM profile. Unlike a physical SIM, you cannot simply remove it, but operators can remotely deactivate the profile. When you get a replacement device, your operator can re-provision the eSIM.
Yes. You can add a local eSIM plan for your destination country while keeping your UK eSIM active. This allows you to use a local number and data rates while still receiving calls on your UK number.