Travel SIM vs eSIM vs Portable WiFi Hotspot: Which Should You Use Abroad?

Getting online abroad used to mean one awkward choice: pay your network's roaming rate, or hunt for a local SIM at the airport. In 2026 you have at least three genuinely different options — a physical travel SIM, an eSIM, and a portable WiFi hotspot device — and they suit very different kinds of trip. This guide walks through what each one actually is, the real trade-offs, and a simple framework for picking, rather than crowning a single winner.

Photo by Mary Taylor on Pexels

The three options in one sentence each

• Travel SIM — a physical SIM card you put in your phone, usually pre-loaded with data for a region, replacing your normal SIM for the trip.
• eSIM — the same idea with no plastic: a digital SIM you install by scanning a QR code, sitting alongside your normal SIM so you keep your UK number active.
• Portable WiFi hotspot — a small standalone device that creates its own WiFi network, which several of your devices connect to at once. It carries its own data, so nothing goes in your phone at all.

They're not simply three flavours of the same thing. The first two are about getting one phone online cheaply. The third is about getting a group of devices online from a single connection. That distinction drives almost everything below.

Option 1: The physical travel SIM

A travel SIM is the old reliable. You buy a SIM (online before you go, or at the destination), pop out your normal SIM, and slot the new one in.

What's good about it:

• It works in basically any unlocked phone, including older handsets that don't support eSIM at all. If your phone is a few years old, this may be your only option — worth checking with our guide to whether your phone supports eSIM before assuming.
• Regional travel SIMs (a single SIM covering, say, all of Europe) can be excellent value for longer trips. Our roundup of the best travel SIMs for Europe covers the current options.
• No app, no account setup — for the less tech-confident traveller, physically swapping a card is reassuringly simple.

What's not:

• You have to physically swap cards, which means carrying (and not losing) your normal SIM in that fiddly little tray. Drop it on a train and you've got a problem.
• While the travel SIM is in, your normal UK number is offline — you won't get calls or texts to it, including bank verification codes, unless your phone has dual-SIM slots.
• You're committing before you can test the signal. If the SIM's underlying network is weak where you're staying, you're stuck with it.

Travel SIMs make most sense for a single traveller on a longer trip to one region, especially with an older phone. For a fuller head-to-head on the plastic-versus-digital question, see our dedicated piece on eSIM vs physical SIM.

Option 2: The eSIM

An eSIM does everything a travel SIM does, minus the plastic. You buy a plan online, scan a QR code, and a second digital SIM installs itself. Your UK SIM stays put, so your normal number keeps working for calls and texts while the eSIM handles data.

What's good about it:

• Nothing to swap or lose. It's all software. You can even install it before you fly and have it activate on landing.
• Your UK number stays live. This is the big one — those bank and login verification texts keep arriving.
• Instant delivery. No waiting for a card in the post, no airport kiosk queue. If you land and realise you need data, you can often buy and install one in a couple of minutes. Our guide to the best eSIM apps for travel covers where to buy.
• Region-specific plans are plentiful and competitive, from Europe and the USA to multi-country Interrail-style trips.

What's not:

• Your phone has to support it. Most flagships from the last few years do, but plenty of budget and older phones don't. Check our eSIM compatibility guide first — an eSIM plan is useless on a phone that can't run it.
• It only connects one device. The eSIM lives in your phone. Your travelling partner's phone, your laptop, and the kids' tablets are all still offline unless each buys its own plan.
• Setup, while quick, is one more app and account than some travellers want. If you're unsure how the whole thing works, our explainer on how eSIM works is a good starting point.

For a solo traveller with a modern phone, an eSIM is usually the path of least resistance. If you're weighing specific providers, our comparison of Airalo vs Holafly goes deeper.

Option 3: The portable WiFi hotspot

Here's where the category genuinely changes. A portable WiFi hotspot is a physical device — pocket-sized — that pulls in a mobile signal and rebroadcasts it as a private WiFi network. Your phone, laptop, tablet, and travelling companions' devices all connect to it, not to a local carrier directly.

This is a different proposition from the WiFi rental devices you collect at the airport and hand back. Our existing guide to WiFi hire vs eSIM for family travel covers the rental model; the newer angle is a hotspot you actually own and keep.

One example we've partnered with is Globlinker's portable WiFi hotspot, and it's a useful device to think through because it illustrates both the appeal and the caveats of the category.

How it works and what it costs:

• It's a one-off £139 in the UK (confirmed via their own currency selector), not a subscription.
• It uses so-called CloudSIM technology — no physical SIM at all. The device automatically connects to the strongest available local carrier in whatever country you're in, across 130+ countries including the UK.
• It connects up to 8 devices at once — phones, laptops, tablets — from a single connection.
• It ships with 10GB of starter data plus 2GB every month free "for life", and the free monthly allowance stacks if you don't use it. When you need more, you buy prepaid top-ups — again, not a recurring subscription.
• It comes with a 60-day money-back guarantee and a lifetime device warranty.

The honest caveats. Globlinker holds a 4.8 rating on Trustpilot from 160+ reviews, which sounds strong — but it's worth reading with a critical eye. The UK consumer forum MoneySavingExpert has flagged that the review base is young (heavily concentrated since the start of this year) and skewed strongly to five stars, the sort of pattern that warrants a bit of caution rather than blind trust. They also, reasonably, questioned the realism of "lifetime" data promises — no company can guarantee a network, or itself, will exist indefinitely, so treat "free data for life" as a nice-to-have rather than a cast-iron entitlement. None of this means the device is bad; it means you should lean on the 60-day money-back guarantee to test it on a real trip before you count on it.

What's genuinely good about the category:

• One connection, many devices. For a family or a couple with a laptop, this is the standout advantage. Nobody's buying their own SIM or eSIM.
• No per-trip cost after the hardware. Once you own it, there's no new SIM to buy for each destination. For frequent travellers that can work out cheaper over time.
• Nothing goes in your phone. Your UK SIM stays in, your number stays live, and you're not swapping anything or checking compatibility.

What's not:

• High upfront cost. £139 is a lot next to a £5–£15 eSIM. For one solo trip, it rarely makes sense.
• Another thing to carry and charge. It's a second gadget with its own battery to keep topped up.
• You're trusting the device's carrier choice. CloudSIM picks the network for you, which is convenient but takes the decision out of your hands.

Cost: the honest maths

This is where the three diverge most clearly.

• eSIM / travel SIM: low cost per trip, paid every trip. A week in Europe might be £5–£15. Three separate trips a year, three separate purchases.
• Portable hotspot: high cost once (£139 for the Globlinker example), then only top-ups when the free allowance runs dry. The break-even against buying an eSIM every trip depends entirely on how often you travel and how many devices you're connecting.

A rough rule of thumb: if you take one or two solo trips a year, the per-trip eSIM almost always wins on cost. If you travel often, or always with a partner, laptop, and a couple of tablets, the owned-hotspot maths starts to favour the device — because you're replacing several eSIM purchases per trip with none.

Keeping your UK number and plan sorted

Whichever you choose, don't forget the SIM already in your phone. If you're on a domestic plan with generous EU roaming built in, you might not need anything extra for a short European hop at all — check our guide to SIM-only deals with EU roaming, and if you're a Three customer specifically, whether you can use Three abroad without roaming charges. And for the specific case of a cruise — where you're often at sea, not in any country — see our note on SIM cards for cruises, because none of these three options handles open water the way you'd expect.

Who each option actually suits

Choose a physical travel SIM if: you have an older phone that doesn't support eSIM, you're taking a longer trip to a single region, and you'd rather swap a card than fiddle with an app.

Choose an eSIM if: you're travelling solo (or everyone in your group is happy to sort their own), you have a modern phone, and you want the cheapest, fastest, most flexible option for a single device. For most people on most trips, this is the default.

Choose a portable WiFi hotspot if: you're connecting several devices at once — a family, a couple with laptops, a group — or you travel frequently enough that a one-off device cost beats buying an eSIM over and over. Just go in clear-eyed about the £139 upfront and the caveats around "lifetime" claims, and use the money-back window to prove it works for your travel pattern before relying on it.

The framework, not the winner

There isn't a single best answer, and any guide that names one is oversimplifying. Ask yourself three questions:

1. How many devices need to be online at once? One → eSIM or travel SIM. Several → hotspot.
2. How often do you travel? Occasionally → pay-per-trip eSIM. Frequently → owning a device may pay off.
3. Does your phone support eSIM, and do you want to keep your UK number live? No eSIM support → travel SIM or hotspot. Want your number live with minimal fuss → eSIM or hotspot.

Answer those honestly and the right option usually picks itself. A solo traveller with a recent phone almost never needs to spend £139 on hardware; a family of four juggling phones and tablets across several trips a year might find it the cheapest and least stressful choice they make.

The bottom line

Travel SIMs are the compatible-with-anything veteran, best for older phones and long single-region trips. eSIMs are the flexible, cheap, keep-your-number default for solo travellers with modern phones. Portable WiFi hotspots like Globlinker's are a different animal entirely — one owned device connecting many, better for families and frequent travellers, with a higher upfront price and some marketing claims worth taking with a pinch of salt. Match the option to how you actually travel, not to which sounds most modern.

Compare travel SIM and eSIM options for your next trip →