eSIM vs Local SIM Card: Which Should You Use?

When you land in a new country, you have two main options for cheap local data: buy a physical SIM card on arrival, or install an eSIM before you leave home. Both work — but they suit different travellers.

The Case for eSIM

Install before you travel. You set everything up at home, on your sofa. The moment you land, your data is ready. No queues, no language barriers, no hunting for a phone shop.

Keep your number active. Your primary SIM stays in your phone. You can still receive calls and texts on your home number while using eSIM data.

Multiple trips, one phone. You can store multiple eSIM profiles. Switch between them for different countries without swapping anything.

Works in 190+ countries. Roamaly eSIMs cover virtually everywhere you'd want to travel.

The Case for Local SIM

Often cheaper for long stays. If you're spending a month in Thailand, a local SIM bought in a mall for £5 with 30GB included is hard to beat on price.

May include calls and texts. Local SIMs often bundle local calling minutes — useful if you need to call hotels or restaurants locally.

No phone compatibility required. If your phone doesn't support eSIM, a local SIM is the only option.

The Verdict

For most travellers on trips under two weeks — especially those visiting multiple countries — eSIM wins on convenience and value. For long-term stays in one country, a local SIM may save money.

Frequently Asked Questions

Can I use both an eSIM and a physical SIM at the same time?

Yes. Most modern phones support dual SIM (eSIM + physical SIM simultaneously). Your home SIM stays in the tray; the eSIM handles travel data.