OneSim is a travel eSIM store built for people who want to land, switch on their phone and get on with their trip. We sell prepaid mobile data plans for more than 200 destinations, delivered as digital eSIMs on a network powered by Airalo. There is no shop counter, no physical SIM tray and no queue at the airport. You choose a plan online, install it before you fly, and your data is ready the moment you arrive.
We started OneSim because roaming charges and airport SIM kiosks are two of the more frustrating parts of travelling. Buying a local SIM often means a language barrier, a long queue, or a plan that only makes sense if you read the small print. An eSIM plan bought in advance takes that off your plate, so you can focus on the trip rather than the phone.
Our plans cover single countries, regions and a global option, so whether you are visiting one city or travelling across several countries on one trip, there is a plan sized for the journey. Every plan is data-only: it is meant to sit alongside your regular SIM, which stays in your phone for calls and text messages, while the eSIM handles your mobile data.
You can browse plans by destination, by region, or look at our global coverage if you need one plan for a longer, multi-country trip. Checkout is handled through Stripe, and you can pay by card, Apple Pay or Google Pay.
Everything about OneSim is built around getting you online quickly and without fuss. As soon as your order is placed, an account is created automatically using the email address you checked out with, and we send you a link to set a password. Within minutes, your eSIM arrives by email: a QR code, a one-tap install link if you are on a recent iPhone, and the manual details for any other eSIM-compatible phone.
You do not need to keep hold of that email forever, though. Everything is stored in your customer dashboard, where you can see your orders, check how much data you have left, and buy more data when you need it. Before you buy, it is worth checking your phone against our device compatibility checker, since eSIMs only work on unlocked, eSIM-capable devices.
We try to keep things straightforward: prices are shown clearly before you pay, there are no contracts or subscriptions to cancel, and you are buying a single plan for a single trip. If something goes wrong with your order, our refund policy sets out what we can do to help. Our terms and conditions, privacy policy and cookies policy cover the rest of how we handle your order and your data.
If you ever get stuck, our support team is reachable by email at hello@one-sim.io, and our Help Center has answers to the questions we hear most often.
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