What is eSIM?
An eSIM is a digital SIM built into your phone — no plastic card to post, insert or swap. FlexiFone’s multi network eSIM connects to EE, O2, Vodafone and Three, and switches automatically to whichever has the strongest signal where you are. Set up in about 60 seconds, from £3.75/mo.
No Plastic. No Post. Just Scan.
An eSIM does exactly what a normal SIM card does. Flexifone multi network esim proves to the network who you are and connects you to data, calls and texts. The difference is that it’s already built into your phone. Instead of waiting for a card to arrive and pushing it into a tray, you scan a QR code, and your phone downloads the profile.
That small change makes a few things much easier. You’re connected in minutes rather than days. You can hold more than one plan on the same phone and switch between them in settings — useful if you want a second line that works when your main network doesn’t. And there’s no tiny piece of plastic to lose.
With FlexiFone, the best eSIM you download isn’t tied to one network. It’s a multi-network profile with access to EE, O2, Vodafone and Three, so your phone connects to whichever has the best signal where you’re standing.
Four UK Networks eSIM
One profile eSIM with access to EE, O2, Vodafone and Three.
Two Lines, One Phone
Keep your main number and run FlexiFone alongside it.
60 Seconds
Scan the QR code and you're connected — no waiting for delivery.
Free EU & Global Roaming
Roam like home in 170+ countries with Flexifone UK Travel eSIM.
FlexiFone is designed as your additional or secondary line — a reliable backup for data and calls alongside your main contract, not a replacement for it.
eSIM vs Physical SIM: What Actually Changes
Both give you the same connection. The difference is how you get it, and what you can do afterwards
| Feature | eSIM | Physical SIM |
|---|---|---|
| Format | A digital profile already built into your phone | Plastic card posted to you |
| How fast you're connected | Around 60 seconds after you scan the QR code | 1–3 working days for delivery, then insert |
| Cost | Free with any FlexiFone plan | £3.50 one-off |
| Multiple plans on one phone | Yes — keep your main number and FlexiFone side by side | Only if your phone has two SIM trays |
| SIM tray needed | No — works on phones with no tray at all | Yes |
| If your phone is lost or stolen | Nothing to remove; the profile can be reissued | The card can be taken out and used elsewhere |
| Moving to a new phone | Transfer the profile, or we reissue it | Move the card across |
One Multi Network eSIM. All Four UK Networks.
Most UK Travel eSIMs put you on a single network. If that network is weak where you live, work or travel, you’re stuck with it. FlexiFone’s eSIM has access to all four UK networks, and your phone moves between them automatically when the signal drops.
EE
Broad rural and motorway coverage across the UK.
O2
Strong in city centres, transport hubs and large venues.
Vodafone
Wide coverage with good indoor performance in built-up areas.
Three
Fast data where its 5G network has been rolled out.
You Stay in Control
Switching happens on its own, but you’re not locked out of the decision. From your FlexiFone account portal you can allow or block any of the four networks — handy if one performs badly at your address, or if your main SIM is already on that network and you want your FlexiFone line on a different one.
Does Your Phone Support eSIM?
Most phones from the last few years do. To check, open your dialler and type *#06# — if an EID number appears alongside your IMEI, your phone has an eSIM chip. It also needs to be unlocked. Below is how the main handsets perform on a multi-network SIM.
Full support
- iPhone — all features working
- Samsung Galaxy S series — all features working
Works, with limits
- Google Pixel — no 5G, due to the carrier-profile requirements our switching uses. VoLTE may not work on Pixel 4, 5, 6 and 7. Best used as a data-only second line.
- Motorola — no VoLTE in dual-SIM mode.
- Budget Android under £300 (Motorola, Honor, OnePlus, Xiaomi, entry-level Samsung) — these lack full carrier aggregation and intelligent network selection, so expect weaker signal and slower speeds than a flagship.
Not supported
- Sony Xperia over eSIM — choose a physical SIM
- Some imported handsets — APN issues we can't always resolve
From Order to Online in Five Steps
- 1Pick your plan
Choose a data-only or voice & data plan, monthly or annual. Select multi network travel data eSIM as your SIM type at checkout — it’s free. - 2Check your email
Your eSIM QR code and activation instructions arrive by email once your order is confirmed. - 3Scan the QR code
On iPhone: Settings › Mobile Service › Add eSIM › Use QR Code. On Android: Settings › Network & Internet › SIMs › Add eSIM. - 4Turn on data switching
In your mobile data settings, allow the phone to switch cellular data between lines. This is what lets FlexiFone pick up when your main network drops out. - 5You’re connected
Your phone selects the strongest of the four networks and keeps checking as you move. Manage your plan or block a network any time in your account portal.
Land, Scan, Connected
An multi network eSIM is at its best when you travel. There’s no shop to find and no local SIM to buy — your FlexiFone line is already on your phone when you land.
Roaming across the EU and EEA is included free on your plan, and you can roam like home in 100+ countries worldwide. No daily access fees, no surprise add-ons.
- Free roaming across the EU and EEA
- Roam like home in 170+ countries
- Keep your main UK number on your other line
Frequently Asked Questions
Yes. An eSIM profile is encrypted and stored on a dedicated chip in your phone, the same way a physical SIM’s data is protected — it can’t be copied or cloned by removing a card, because there’s no card to remove
Nothing to remove or reuse, unlike a physical SIM. Contact us and we’ll deactivate the profile and reissue it to your new device once you’re set up again.
Yes, you can use the same QR code to install it on your new device. Before installing, make sure you’ve deleted the eSIM profile from your previous device first.
Yes, for the initial setup — scanning the QR code and downloading the profile requires an internet connection. Once installed, the eSIM works over the mobile network like any SIM.
The EID (eSIM Identifier) is a unique number built into your phone’s eSIM chip, similar to a serial number. You’ll see it alongside your IMEI when you dial *#06# — it’s what confirms your device supports eSIM.
