Travel SIM card or eSIM? Posted SIMs, instant eSIMs and pocket Wi-Fi compared

Information verified on 24 October 2026 at the official sources listed below. This is not financial advice; check card settings, fees and limits with your bank before you pay. How we check information.

This site is not affiliated with any of the networks mentioned here; we sell eSIMs. How we compare

If your phone cannot take an eSIM, we cannot help you, and a physical SIM is your option. You may also need nothing at all: ten of the 15 UK networks include Europe in your plan, each within its own fair-use terms, and all 15 include Ireland.

Travel SIM card or eSIM: the difference

The four ways to get data abroad differ in how the line reaches your phone: a card in the tray, a QR code you scan, or your UK plan roaming. That decides delivery and what happens to your UK SIM.

A holiday SIM, a roaming SIM or an international SIM card is one of these four under another name. Physical SIM vs eSIM is not a question of signal: both use a local network abroad.

On most of our plans the days start when the eSIM first connects at your destination; check the activation rule shown on your plan. Our plans ask for no ID. Almost all of them give 365 days to install; the plan’s own page has its figure.

When a physical travel SIM is the better choice

A physical SIM is the right choice for phones without eSIM, and a prepaid travel SIM posted before you fly is the usual answer. Dial *#06#: if an EID number appears, the phone takes an eSIM. If not, check which phones take an eSIM before you buy anything from us.

Apple’s UK page names the iPhone XS, XS Max and XR or later, with exceptions for some models sold in China mainland, Hong Kong and Macao. Google says every Pixel 4 and later works with eSIM. Samsung’s UK list starts at the Galaxy S20 series and adds the Z Fold and Z Flip phones, the FE models and some A models, several only in certain regions. Samsung warns that, depending on the country of origin, eSIM may not work even on a listed phone.

Two more cases suit a card. A spare older handset may have only a tray. And on a long stay in one country, a local SIM gives you a local number; a data-only eSIM does not.

Local SIM on arrival: the catches

Buying at the airport puts a queue and a sales pitch between you and your first message home. Take your passport, and ask what the shop needs before you queue. We hold no verified prices for local SIMs, so we give none.

Turkey has a rule of its own. Buy and install your eSIM before you travel: eSIM shops, including ours, may not open on Turkish networks.

The tiny SIM problem

A card carries two risks an eSIM does not. The tray tool and the SIM are both small, and a UK SIM dropped on a pavement in Lisbon takes your bank texts with it. On a one-tray phone, a posted SIM also switches your UK line off for the whole trip.

To keep your UK number while abroad, you need dual SIM: two trays, or one tray plus an eSIM, with both lines on. Apple, Samsung and Google each document the setting, and keeping your UK number has their steps.

When an eSIM is the better choice

An eSIM is the better choice when your phone takes one and you fly within days, or when your UK SIM should stay put. You install it from the QR code in your order e-mail; posted SIM vs instant eSIM comes down to that wait.

Your UK number stays on for calls and texts. Apple says “Your iPhone can use one mobile data network at a time”, so you pick the travel eSIM for data and leave the UK line on for calls. Calls and texts on that line are charged by your UK network, not by us.

Three limits are worth knowing before you buy:

• Our regional plans are data only. A few local plans allow local calls, but no outgoing international calls.
• The phone must be unlocked. Ask your UK network; the same lock stops a physical travel SIM too.
• The profile lives in the phone. A new phone means a new install, and our transfer guide covers it.

The rest, from deleting a profile to Turkey, is in what an eSIM is and its downsides.

Full refund within 30 days of purchase as long as the eSIM hasn’t connected to a network; we refund within 14 days of your request.

On price, our Europe plan is £2.99 for 1 GB over 7 days, data only. Other eSIM sellers listed the same 1 GB for 7 days in Europe at £3.49 to £9.00 on 24 October 2026, data only. For a trip across more than one region, our worldwide plan is £5.99 for 1 GB over 7 days, data only (worldwide eSIM). Compare GB and days, not the headline number.

Travel SIM vs your network’s roaming pass

On the five UK networks that charge in Europe, seven days of use cost £14 to £19.25 day by day, or £12 to £16.50 with the smallest pass that covers them (our arithmetic, checked on 24 October 2026). The other ten include Europe, which is why a SIM is not always needed.

The day-by-day column is our arithmetic from each network’s published rate, for the plan condition in the first column.

Prices checked on 24 October 2026 (EE), 24 October 2026 (Vodafone), 24 October 2026 (Three), 24 October 2026 (Sky Mobile) and 24 October 2026 (VOXI), at the links in the first column.

What starts a charge differs. On EE and Vodafone, a call you make or a text you send on the UK line makes it a charged day, and EE counts the day midnight to midnight, UK time. Sky’s £2 pass runs for 24 hours from a call you make, a text you send or more than 10MB of data; receiving calls and texts does not start it. VOXI’s passes count from the date you buy them, and without one your allowances do not work in Europe.

Turning data roaming off on the UK line does not stop that. If a travel eSIM carries your data, one call home on EE, Vodafone or Sky still costs the day’s charge.

Roaming uses your own number and allowance; a travel eSIM is a separate data-only line. A week of calls home on your number is roaming’s job. A week of maps and messaging is the eSIM’s.

When you connect abroad, Ofcom’s General Condition C3.15 requires your network to text you the prices and whether the place is in your plan (Ofcom: using your mobile abroad). Read that text before you buy anything else. Each network’s own figures are in roaming charges by network.

Pocket Wi-Fi and travel routers

A pocket Wi-Fi or travel Wi-Fi router shares one connection with several phones, so it suits a group that stays together; an eSIM gives each phone its own line. We have no verified prices for pocket Wi-Fi rental or purchase, so we give none.

The trade-offs are practical. One person carries the device, and when its battery runs flat, everyone loses data. A rented unit also has to go back. With an eSIM on each phone, nobody has to stay near the router.

Sharing an eSIM through your phone’s hotspot depends on the plan. Our plan pages state no hotspot rule, so message us on WhatsApp before relying on it; the hotspot guide covers the phone side. For one destination, our Japan guide sets pocket Wi-Fi beside an eSIM.

Frequently asked questions

Sources are linked in the text; reviewed by Nadezhda Semenova. For the terms of your own contract, check with your network.

Unfamiliar term? See the eSIM glossary.