eSIM vs Pocket WiFi vs Local SIM for Travel

For one to three people on a trip of a few days to a few weeks, a travel eSIM wins on almost every axis: cost, setup time, and the fact that nothing has to be returned. That covers the large majority of leisure trips.

Pocket WiFi becomes competitive for groups of five or more who genuinely stay together, or for anyone travelling with older devices that have no eSIM support. A local SIM starts to win somewhere past the one-month mark, or when you specifically need a local phone number. Home-carrier roaming wins only when someone else is paying.

The rest of this guide is the reasoning behind those lines, because the edges are where people choose badly.

A travel eSIM is a data plan delivered as a digital profile that you install on your phone. There is no plastic to collect, no counter to queue at, and nothing to post back. You buy it before you fly, install it over your home wifi, and it sits dormant until you land.

The important structural detail is that it does not replace your home SIM — it sits alongside it. Your home number stays reachable for calls and, critically, for the SMS codes your bank sends when you try to pay for something abroad. That single fact is the reason eSIMs displaced local SIMs for short trips, more than price ever did.

The requirements are narrow but real: the phone must support eSIM, and it must be carrier-unlocked. Most flagship phones from 2018 to 2019 onward qualify. The setup guide at /get-connected covers installation step by step, and /device-check lists the specific models.

A pocket WiFi is a battery-powered router you rent for the duration of your trip. It creates a private wifi network that several devices join at once, which is its entire appeal.

The cost structure is the thing to understand: you pay per DAY, and you pay for the device rather than for the data. That means the price of a pocket WiFi rental scales with how long you travel, not with how much you use it. A three-day trip is cheap. A three-week trip is not. Cross the line where the accumulated daily fee exceeds a flat data plan and the advantage disappears entirely, and that line arrives sooner than most people expect.

There are also costs that do not appear on the rental page. Most rentals hold a deposit against loss or damage, which is refunded but ties up money and, more annoyingly, requires you to actually return the device. Some services want it posted back, which means finding a post box in a country whose postal system you do not know, on the day you are leaving.

Buying a SIM at the airport can genuinely be the cheapest data available in a country, because you are buying at domestic rates rather than roaming rates. For a long stay, that gap compounds into real money.

What it costs you is arrival day. You land, you find the operator counter, and you queue — sometimes behind every other passenger from your flight who had the same idea. In most countries you then hand over your passport for identity registration, which is a legal requirement rather than a formality, and wait for the activation to propagate.

Then you physically remove your home SIM. That is the part people underestimate. Your home number goes dark until you put it back, so any service that verifies you by SMS to that number stops working. Your bank, in particular, chooses the worst possible moment to ask for a code.

Roaming with your existing carrier is genuinely the most seamless option: you land, your phone connects, nothing changes. That convenience is what you are paying for, and you pay for it every single day of the trip.

Most carriers now sell it as a daily pass rather than per megabyte, which at least removes the risk of a catastrophic bill. But the daily-pass model means a two-week trip costs roughly seven times what a two-day trip costs, for the same phone doing the same things. Check your own carrier's current rate before you assume — the passes vary widely and some regions are excluded from the flat rate entirely.

One exception worth knowing: within the European Union, EU-registered carriers generally include roaming across member states at domestic rates. If you are an EU resident travelling inside the EU, roaming may already be free and none of this applies to you.

The four options do not just have different prices, they have different price SHAPES, and that is what determines which one wins for a given trip.

A travel eSIM is priced per gigabyte with a validity window: the cost tracks how much data you use, and trip length matters only up to the expiry date. Pocket WiFi is priced per day: cost tracks trip length and is almost indifferent to usage. Roaming is also priced per day, so it behaves like pocket WiFi with a worse rate and better convenience. A local SIM is a one-time purchase with domestic pricing, so its cost per day falls the longer you stay.

Plot those against trip length and the crossovers are obvious. Short trip, light usage: eSIM. Short trip, five people: pocket WiFi. Long stay: local SIM. Someone else paying: roaming.

The case for pocket WiFi is sharing — one rental, many devices. It is a real argument, but it is weaker than it looks, because an eSIM can be shared too.

Any phone running a travel eSIM can act as a personal hotspot, which is functionally the same thing as a pocket WiFi with one fewer device to carry and charge. vigxo eSIMs allow hotspotting without restriction. So the group comparison is not "sharing versus not sharing" — it is "a dedicated router versus using someone's phone as the router".

The dedicated router wins on battery, because it is not also running everyone's maps and messages. It loses on everything else. And for a group of two to four, buying several eSIMs in one order is usually cheaper than the daily rental — vigxo applies an automatic group discount that grows with the number of travellers, with no code to enter.

This is the failure mode nobody plans for and almost every group hits. Two people want the museum, two want the market, and the pocket WiFi can only be in one place.

Whoever does not have it is offline — no maps, no messaging, no way to coordinate the meet-up that just became necessary. The device that was supposed to be the group's connection becomes the reason half the group cannot use it.

Individual eSIMs do not have this property. Everyone is independently connected, which matters most exactly when the group is apart. If your trip involves any chance of splitting up — and most trips longer than three days do — this consideration outweighs the rental arithmetic.

A pocket WiFi is another object. It needs charging every night, it needs carrying every day, and its battery life sets a hard limit on how long your group can be out. When it dies at four in the afternoon, everyone is offline at once.

Running an eSIM on your own phone shifts that load onto a battery you were already managing, which is a real cost — heavy hotspot use drains a phone noticeably faster. The honest comparison is not that eSIMs have no battery cost; it is that you have one battery to manage instead of two, and a power bank solves it either way.

The bag matters more than people expect on a long travel day. A router, its cable, and its charger is a small pile of things to lose, and losing a rental means paying for it.

Mostly no, and this is worth stating plainly because a lot of marketing implies otherwise.

All four options ultimately use the same physical cell towers belonging to the same national operators. A travel eSIM roams onto those networks, a pocket WiFi contains a SIM that does the same thing, a local SIM is on one of them directly, and your home carrier has a roaming agreement with them. The radio hardware in the ground is identical.

Where genuine differences appear, they are about WHICH operators you can reach and at what priority. A local SIM is a domestic subscriber on one network, which can mean better priority during congestion. A roaming eSIM may be able to hand off between several national networks, which is an advantage in a dead spot for one carrier. Neither difference is large enough to choose on for a normal trip, and any specific speed claim you see should be treated with suspicion.

A travel eSIM asks for about five minutes of your time before you leave home, on your own wifi, where any problem is solvable. That is the whole setup, and it is why it is the low-stress option: whatever can go wrong, goes wrong while you are still in your kitchen.

A pocket WiFi asks for a booking in advance, a pickup on arrival, and a return on departure. A local SIM asks for a queue, a passport, and a SIM-swap performed on a chair in an airport with your existing SIM held between two fingers. Roaming asks for nothing at all, which is exactly why it stays switched on and quietly bills you.

The step-by-step installation instructions for an eSIM, including what to do if the QR code does not scan, are at /get-connected.

There are three cases, and they are worth being honest about rather than pretending the eSIM is always right.

First, long stays. Past roughly a month, domestic pricing beats travel-plan pricing by enough to justify the arrival-day queue. Second, when you need a local phone number — for a delivery service that will call you, a landlord, a bank account, or a service that verifies by local SMS. Travel eSIMs are data-only and do not provide a number. Third, when your phone is carrier-locked or has no eSIM support, in which case the choice is made for you.

Outside those three, the arrival-day cost is real and the price advantage is small.

Ask three questions. Is anyone else paying? Then roam. Are you staying more than a month, or do you need a local number? Then a local SIM. Is your group five or more people who will genuinely never separate, or are you carrying devices with no eSIM support? Then pocket WiFi.

Otherwise it is a travel eSIM, and the only remaining decision is how much data to buy — which is its own guide, at /guides/essentials/how-much-data-do-you-need.