eSIM vs Local SIM vs Pocket Wi-Fi vs Roaming: What's Best for Travel?

Staying online abroad used to mean a nasty roaming bill or a queue at an airport phone shop. Today there are four realistic options. Which one is right depends on where you're going, how long you stay and how much hassle you're willing to accept.

1. Roaming with your home plan

The simplest option: do nothing and your phone connects to a partner network abroad. Inside the EU, operators from EU countries generally have to offer “roam like at home” at no extra cost. Outside your home region, though, roaming is often charged per day or per megabyte and can add up quickly.

• Best for: short trips within your operator's included zone.
• Watch out for: daily roaming passes and per-MB charges outside that zone.

2. A local SIM card

Buying a SIM from a local operator usually gets you the lowest price per gigabyte and a local phone number. The trade-offs are the time spent finding a shop, ID or passport registration in many countries, removing your home SIM, and the risk of losing the tiny card.

• Best for: long stays where a local number matters.
• Watch out for: shop hours, registration rules and swapping SIM cards.

3. Pocket Wi-Fi

A portable router lets several devices share one connection, which can suit families or groups. But it's another device to collect, charge, carry and return — and if the person holding it walks away, everyone else loses their connection.

• Best for: groups sharing one plan, or devices without eSIM.
• Watch out for: rental fees, deposits, battery life and late-return charges.

4. A travel eSIM

A travel eSIM is a digital SIM you install by scanning a QR code before you leave. When you land you switch it on and you're online through a local network — no shop, no swap, no device to return. Your home SIM stays in the phone, so you can still receive calls and SMS codes.

• Best for: most short and medium trips, multi-country trips and anyone who wants data the moment they land.
• Watch out for: phone compatibility (it must support eSIM and be unlocked). Most travel eSIMs are data-only, so calls go through apps like WhatsApp.

The quick verdict

• Weekend inside your home roaming zone: roaming is fine.
• Holiday outside your roaming zone: a travel eSIM is usually the cheapest hassle-free option.
• Several countries in one trip: a regional eSIM avoids buying a new SIM in each country.
• Months abroad and you need a local number: a local SIM card.
• A family sharing data on older phones: pocket Wi-Fi can still make sense.