Anyone who's travelled since Brexit will be familiar with the sinking feeling of landing somewhere sunny, switching off flight mode, and watching their phone cheerfully inform them that data will cost £2.50 per megabyte. The post-Brexit unravelling of free EU roaming was a genuine blow to British holidaymakers, and the networks have been in no particular hurry to soften that blow. But while the big operators have been quietly profiting from roaming bolt-ons, a wave of eSIM travel providers has been building an alternative that's faster, cheaper, and considerably less stressful.
The Old Way Was Always Rubbish, Really
Let's be honest about the traditional options. Roaming bolt-ons from major UK networks — the kind you add via an app the night before you fly — have improved since the darkest days of per-megabyte billing, but they're still expensive relative to local rates. EE's Europe Travel Pass runs at around £2 per day for a capped daily allowance. Vodafone's Roaming Passport is similarly priced. Three has historically offered better roaming terms through its "Go Roam" programme, but the allowances are throttled compared to your home plan.
For a two-week family holiday, those daily charges stack up fast. A couple using their phones normally could easily spend £50 to £80 on roaming bolt-ons for a fortnight in Spain or Portugal — and that's before anyone starts streaming anything.
The airport SIM card dash was never a great solution either. Those kiosks in the arrivals hall are specifically positioned to catch disoriented, just-landed travellers who haven't sorted anything in advance. Prices reflect the captive audience. And even if you buy a local SIM before you fly — from a specialist travel shop or online — you're dealing with a physical card, a different number, and the constant faff of swapping SIMs in and out while trying not to lose either one down an airport drain.
Enter the eSIM Era
eSIM technology — the embedded, reprogrammable SIM that's been standard in iPhones since the XS and in most flagship Android devices for several years — has quietly enabled a completely different travel data model. Instead of a physical card, you download a profile. Instead of queuing at an airport kiosk, you sort everything from your sofa the week before you go.
Providers like Airalo, Holafly, and Nomad have built entire businesses around this model. They aggregate data from local carriers around the world and sell it in convenient packages through apps that take minutes to set up. The process is genuinely straightforward: choose your destination, pick a data package, scan a QR code, and the eSIM installs itself. When you land, it connects automatically to a local partner network. Your UK number stays active on your physical SIM (assuming your phone has a dual SIM setup, which most modern handsets do) for calls and texts, while the eSIM handles data at local rates.
How the Numbers Stack Up
The cost comparison is where things get interesting. Take a week in France as an example — a common destination for British holidaymakers.
EE's Europe Travel Pass at £2 per day comes to £14 for seven days, with a capped daily data allowance that resets every 24 hours. Go over your daily cap and speeds drop significantly.
Airalo's France eSIM, by comparison, offers 1GB for around £3.50, 3GB for roughly £7, or 10GB for about £15. No daily caps, no speed throttling, no expiry until you've used the data or the trip is over. For a solo traveller using data moderately, a 3GB Airalo plan easily covers a week in France for half the price of EE's daily bolt-on.
Holafly operates on an unlimited data model — a flat price for unlimited (but occasionally deprioritised) data for a set number of days. A week's unlimited data for France runs at around £19. That's more than the Airalo option for moderate users, but potentially excellent value for heavy streamers or those working remotely.
For longer trips or multiple destinations, the savings compound dramatically. Airalo offers regional plans covering the whole of Europe, Southeast Asia, or the Americas in a single purchase — ideal for anyone doing a multi-country trip without wanting to juggle separate SIMs for each border crossing.
Setting It Up: Easier Than You Think
The main barrier to eSIM travel adoption is the perception that it's technically complicated. It really isn't, provided your phone supports eSIM — and if you've bought a flagship handset in the last three or four years, it almost certainly does. iPhone users from the XS onwards are covered. Google Pixel 3 and later, Samsung Galaxy S20 and later, and most recent OnePlus and Motorola devices all support eSIM.
The setup process through Airalo, for example, involves downloading the app, creating an account, purchasing your chosen plan, and then following a simple QR code installation. The whole thing takes under five minutes. You can do it weeks before you travel, install the eSIM in advance, and simply activate it when you land. Some providers even offer automatic activation when you arrive in-country, so there's literally nothing to do at the airport except collect your luggage.
One thing to check: make sure your phone is unlocked. Devices still locked to a specific UK network won't accept third-party eSIM profiles. If you're not sure, your network is legally required to unlock your phone once your contract is complete — or, in many cases, for free at any point.
Is This the End for the Travel SIM?
The physical travel SIM card isn't dead yet. Plenty of countries still have limited eSIM coverage from travel providers, and for older devices without eSIM capability, a physical card remains the only option. Budget travellers heading somewhere off the beaten path may find local SIMs cheaper still, and the ritual of hunting down a SIM kiosk in a foreign airport has a certain adventurous charm that no app can replicate.
But the trajectory is clear. As eSIM compatibility becomes universal and provider coverage expands, the airport SIM card dash is going the way of the traveller's cheque — a quaint memory of a more complicated era. For most British holidaymakers heading to Europe, North America, or popular Asian destinations, an eSIM travel plan already makes more financial sense than anything the major networks are offering.
The networks aren't oblivious to this. Some are beginning to explore their own eSIM-based travel products, and competitive pressure from providers like Airalo is at least partly responsible for keeping roaming bolt-on prices from rising even further. But until the big four can genuinely match the flexibility and value of dedicated travel eSIM providers, the smart money — quite literally — is on going independent.
