WorldSIM has kept travellers connected since 2007 and is trusted by more than 5 million customers worldwide. It sells eSIMs (Pro and data-only Connect), physical international SIM cards, data roaming SIMs, portable WiFi (MiFi) devices, smartwatches and UK/USA virtual numbers, all built to cut out roaming charges across 100+ countries.
It suits frequent flyers, backpackers, business travellers and anyone who wants cheap data and calls abroad without juggling local SIMs on every trip. Browse the range, then use our WorldSIM discount codes to bring the price down.
Use it before you book your next eSIM and keep roaming charges off your bill.
10% off a £35 eSIM Pro bundle (20GB data, 360 minutes, 90 SMS) saves you £3.50 at checkout.
Anyone can use it – new and existing customers, including NHS and emergency services staff.
Yes. This code isn’t restricted to key workers, so NHS and emergency services staff get the same 10% off eSIM Pro or eSIM Connect as any other customer.
eSIM Pro includes data, calls and SMS plus a UK mobile number. eSIM Connect is data-only, with no calling or texting – the 10% code applies to both.
Choose your eSIM Pro or eSIM Connect bundle, add it to your basket, then enter the code at checkout before you pay.
The 10% saving runs until 15 October 2026, so redeem it before then.
Blue Light Card members can combine their card discount with WorldSIM codes separately – see our full WorldSIM discount codes page for that route.
This code isn’t restricted to key workers, so NHS and emergency services staff save the same 10% on eSIM Pro or eSIM Connect as everyone else. If you want a bigger saving on top, Blue Light Card members can combine their card discount separately – see our full WorldSIM discount codes page for that route.
This particular code is open to all, but WorldSIM also runs a separate student discount among its promo codes – worth checking if you’re heading abroad for a term or a gap year. Refer a friend to WorldSIM and you’ll both get free credit, and repeat customers can ask support about loyalty credit on future orders.
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