Ever been stung by rubbish signal or sky-high roaming bills? This one’s for you.

Smart SIM is a first-of-its-kind, data-only eSIM that works alongside your main SIM. It gives you access to every UK network, plus networks in 180+ countries abroad on all your essential apps.

Lose signal on your countryside walk or daily commute? Just switch on your Smart SIM and WhatsApp away. Land straight off the plane and need an Uber to your Airbnb? Just switch on your Smart SIM, message your host and book a cab.

Here's why 40,000+ happy customers are using Smart SIM at home and on holiday, for less than the price of a coffee every month:

Unbeatable signal on EE, O2, Three and Vodafone on 500+ essential apps

Say goodbye to getting stranded in signal dead zones. Whenever your main SIM loses signal, you can switch to Smart SIM in just a few taps to keep using 500+ apps on another available network.

So you can stay connected on apps like WhatsApp, ChatGPT and Google Maps – whether you’re on the commute, in the city, or deep in the countryside.

Free global roaming in 180+ countries on 500+ essential apps

Travel like a local. From Spain to South Africa, Italy to India, Smart SIM keeps you connected with no roaming charges.

Use essential apps like WhatsApp, Google Maps, Booking.com and hundreds more wherever you land. Ciao adios, patchy hotel wifi, expensive roaming and pesky data caps.

From just £3.75/month with no hidden fees

One flat fee, no catches. Choose between £10/month or £45/year (that’s just £3.75/month) for total peace of mind that you’ll stay connected when it matters most.

Trusted by 32,000+ happy customers

Our reviews speak for themselves. Customers call Smart SIM a “game-changer”, “revolutionary” and “incredibly good value”. Join over 32,000+ already using Smart SIM to stay connected at home and abroad. For commuting, travelling, and everything in between.

Set up in minutes

Smart SIM works alongside your main SIM, so there’s no waiting around for your contract to end. Order, download and activate in just a few minutes.

Plus, our 14-day money-back guarantee means in the unlikely event that Smart SIM isn’t for you, we’ll give you a full refund. Simple as that.

Try Smart SIM for yourself

500+ apps on every UK network, plus hundreds more worldwide. Data-only eSIM that works alongside your main SIM.

From just £3.75/month.

Explore Smart SIM

5 reasons you’ll wish you got a back-up eSIM sooner

Try Smart SIM for yourself