Roam in 190+ 
Connect to UK networks
500+ essential apps. From £3.75/month · 14-day money-back guarantee
| Your SIM + Smart SIM | Your SIM | |
|---|---|---|
| 📶Connect to UK networks | ||
| 🌍Free roaming in 190+ countries | ||
| ♾️Unlimited data for essential apps | ||
| 💷Flat fee, no surprise charges | ||
| 🧘Peace of mind about staying connected |
Introducing
Your backup eSIM just got an upgrade.
Faster and ready the moment you need it.
On UK networks, plus hundreds more networks worldwide.
Track every time Smart SIM saves you in the app.
In 190+ countries from the moment you land.
Call failedWhatsApp · missed
DeliverediMessage
Payment receivedMonzo · £48.201Incoming callWhatsApp1Annual
+ Free surprise giftBilled annually (works out as £3.75/month)
Get Smart SIM
14 day money-back guaranteeSwitch to Smart SIM in just a few taps or wait for it to kick in when your main SIM loses signal
On hundreds of networks worldwide
Cellular callsInternet browsingSMSSocial mediaVideo and audio streamingFrom commute to countryside and across continents
VerifiedVerified
VerifiedVerified
VerifiedVerified“Smart SIM is a game changer and incredibly good value.”
Josh - Honest Customer
Straight from our team of (extremely friendly) experts
Smart SIM is the ultimate back-up eSIM. It's a data-only eSIM that works alongside your main SIM to give you:
📶 Backup signal – 500+ apps on UK networks
🌎 Free global roaming – 500+ apps with unlimited data in 190+ countries
So whether you’re deep in the countryside, mid-commute, or holidaying in Cameroon, Smart SIM keeps you connected when it matters most.
Set up once then switch in a few taps whenever you lose signal or go abroad. No more rubbish signal, relying on wifi or expensive roaming fees 👋
Easy. Switch to Smart SIM in just a few taps or wait for it to kick in when your main SIM completely loses signal.
All the most essential ones: WhatsApp, Google Maps, Uber, Citymapper, Monzo… the list goes on. Check out the 500+ apps on Smart SIM here.
Our Smart SIM annual plan is £45/year (that's just £3.75/month). Or you can go for our rolling monthly plan at £10/month.
We wouldn’t recommend it. You'll need your main SIM for calls and texts, social media and streaming, and open web browsing.
Smart SIM works alongside your main SIM, ready for you to switch to whenever you lose signal or go abroad. Think of it as your trusty back-up, there when you need it most.
It sure is. Consider it the all-you-can-eat buffet for apps including WhatsApp, Google Maps, Uber, Monzo and many more 📱
You can WhatsApp call and message, but if you're going old school, you'll need your main SIM for texts and calls.
Smart SIM is eSIM only, so you can add it to your phone and start using alongside your main SIM right away.
Just check your phone is eSIM compatible before ordering.
We thought you’d never ask 🤩 Click here to get your Smart SIM – you’ll be up and running quicker than you can say ‘backup signal and free global roaming’.
Smart SIM is the ultimate back-up eSIM. It works alongside your main SIM (on any network) to give you 500+ apps on UK networks, plus free global roaming in 190+ countries around the world. So you never have to worry about rubbish signal or expensive roaming again.
Classic SIM, on the other hand, is your essential everyday UK SIM for texts, calls and data. Classic SIM piggybacks on just one of the big networks to give you 99% UK population coverage and access to fast & reliable 5G. For the ultimate peace of mind when it comes to your signal, we recommend using both.
Not yet. Smart SIM doesn’t support VPNs right now, but we’re working hard on new features. Watch this space 👀
To keep Smart SIM affordable, we’ve limited it to apps that don’t gobble up endless data. That means social media and streaming are off the cards (for now, at least). On the flip side, you have more than 500 apps (and counting) at your fingertips, whether you’re on the train, on your travels or out on the town. Plus, it’ll give you a break from all that doomscrolling 😉
