Travel eSIM questions, answered
What people ask us most about choosing, installing and using a travel eSIM, with links to the comparison pages and tools that go deeper.
Bought an eSIM through one of our links?
Please contact the provider you bought it from. We are a comparison site, not a seller, so we cannot activate a plan, add data, issue a refund or see anything on your account — only your provider's support team can do any of that.
eSIM basics
What is a travel eSIM?
An eSIM is a SIM card that arrives as a download instead of a plastic card. Your phone has a rewritable chip built in, and a travel eSIM installs a data plan for your destination onto it alongside your normal line. You buy it online, install it before you fly, and it connects to a local network when you land.
Does my phone support eSIM?
Most iPhones from the XS onwards, recent Google Pixels and most flagship Samsung Galaxy phones do, but support varies by model and by the country the phone was sold in. Look your model up in our phone compatibility guide, or run the eSIM compatibility checker on the phone itself.
Will a travel eSIM work on a carrier-locked phone?
No. A phone locked to one carrier will refuse a profile from any other, eSIM or not. Ask your carrier to unlock it before you travel; many do it free once the contract or device plan is paid off. Our compatibility checker explains how to check before you go.
Will I keep my normal phone number?
Yes. A travel eSIM sits beside your home SIM rather than replacing it. Set the travel eSIM as the line for mobile data and keep your home line for calls and texts, and your usual number keeps receiving messages, including bank verification codes.
Does a travel eSIM come with a phone number?
Usually not. Most travel eSIMs are data-only, which is all most trips need: WhatsApp, FaceTime and other calling apps work over data under your existing account. If you need a local number for calls or SMS, use the Calls or SMS filter on any destination comparison.
Can I have more than one eSIM on my phone?
Yes. Phones can store several eSIM profiles, and most can keep two lines active at once (dual SIM, dual standby), which is what lets your home number stay on while the travel eSIM carries data. You can leave old travel eSIMs installed and switch them off, but they are worth deleting once their plans have ended.
Further reading: What is an eSIM, and how does it work when you travel?
Choosing and buying
How much data do I need for my trip?
It depends far more on what you do than where you go. Maps, messaging and browsing use very little; video calls, streaming and uploading photos use a lot, and a phone used as a hotspot for a laptop uses the most. Our data calculator works out an estimate from your days away and your habits.
Should I buy a country, regional or global eSIM?
One country: a local plan is usually cheapest. Several countries in one area: a regional eSIM saves buying and installing one per border. A route across continents: compare multi-country plans, which cover your exact list of countries.
How do I find the cheapest eSIM for my destination?
Open your destination from the list of destinations and sort by price. Each plan also shows its price per gigabyte, which is the fairer comparison between a small weekly plan and a large monthly one. Turn on Apply discounts to see prices after any current discount code.
Are unlimited eSIM plans really unlimited?
Rarely without conditions. Most have a fair usage policy that slows your speed after a set amount of data each day, and a few cap the speed from the start. Where a provider publishes those limits we show them on the plan, and the Daily cap filter separates plans that throttle after a daily allowance.
Can I get a free eSIM?
Several providers give away a small trial plan so you can test their app and network, usually limited to new customers and to a small amount of data. They are listed on our free eSIM trials page. They are good for getting online on arrival, not for a whole trip.
Are there discount codes for eSIMs?
Often, especially on a first order. We keep the current codes for each provider on our eSIM deals and discount codes page, and remove them when they expire.
Is a travel eSIM cheaper than roaming?
For data, almost always, and by a wide margin outside your carrier's home region. Carrier day passes look small but are charged every day you use your phone. The roaming cost calculator compares your carrier's charges with an eSIM for your trip, and the trip cost planner adds up connectivity for a whole itinerary.
Which eSIM provider is the best?
There is no single best one: the cheapest provider for Japan is rarely the cheapest for Turkey. Compare plans for your destination first, then read the provider reviews for the ones you are considering. If you already know a brand, our alternatives pages show who else covers the same trip.
Can I use a travel eSIM as a hotspot?
On most plans, yes, but some providers forbid tethering or slow it down. Where a provider states its tethering policy we show it, and the Tethering filter on each destination page shows only the plans that say they allow it.
Do I need to show ID to buy a travel eSIM?
Usually not. Some countries require mobile plans to be registered to a passport, and some providers ask for ID for certain destinations. Where the provider publishes that requirement, we show it on the plan before you click through.
Further reading: How to choose the best eSIM for international travel
Installing and activating
How do I install and activate my eSIM?
On iPhone, open Settings, then Mobile Data (Cellular in some regions), then Add eSIM. On Android, open Settings and look under Connections (Samsung) or Network & internet (Pixel) for the SIM manager, then add an eSIM. Scan the QR code from your provider, or install through the provider's app, and label the new line so you can tell it apart from your home SIM. If you only have the text activation code, our eSIM QR code generator turns it into a scannable code.
When should I install my eSIM?
Before you leave, at home on Wi-Fi. Installing downloads the profile from the provider's server, so it needs an internet connection, which is exactly what you will not have on landing if the eSIM was meant to be it. Installing early is normally safe because most plans do not start until they first connect abroad.
When does my plan's validity start?
With most travel providers, when the eSIM first connects to a supported network at your destination. A minority start on installation, and a few start on purchase with a deadline to install. It is stated in the plan's terms, usually under activation or validity, and is worth checking before you buy weeks ahead.
Can I reuse the QR code or reinstall a deleted eSIM?
Usually not. Most QR codes work once, and deleting the eSIM from your phone usually loses the plan with it. Some providers will reissue a profile if you contact them, but many will not, so turn an old eSIM off rather than deleting it until you are sure the plan is finished.
Using it abroad
Why does my travel eSIM need data roaming switched on?
Because it is roaming. Travel eSIMs are sold by companies that connect to local networks as roaming partners, so with data roaming off the eSIM shows signal and loads nothing. Roaming is set per line: turn it on for the travel eSIM and off for your home SIM, which is the switch that stops your carrier charging you.
How can I check how much data I have left?
Most providers show your remaining balance in their app or on their website, and many send a message as you near the end. Your phone's mobile data settings also count usage per line, though that counter does not reset with your plan, so reset it yourself when the eSIM starts.
What happens if I run out of data?
The eSIM stops loading data until you add more. Many providers let you top up the same eSIM from their app, which keeps everything installed; others sell you a new plan and a new eSIM. If you expect to need more, the Top-up filter on each destination page shows only the plans that can be extended.
How do I avoid charges from my home carrier?
Set the travel eSIM as your mobile data line and switch data roaming off on your home SIM. Texts still arrive with it off. Incoming calls on your home number may still be charged, so check your carrier's rates or use Wi-Fi calling if your carrier supports it.
Why do websites think I am in another country?
Many travel eSIMs send your traffic back through a hub in another country before it reaches the internet, so websites see that country instead of where you are. It changes the language or currency a site picks and can affect streaming catalogues and video call delay. The Low latency filter on each destination page shows plans that connect to the internet locally.
Will a travel eSIM be as fast as a local SIM?
On the same network, often close, but it depends on which local network the eSIM uses and where your traffic leaves for the internet. Each destination page lists the networks available there, shows the 5G plans, and gives a modelled latency band for the plans we can route.
Further reading: How to avoid roaming charges (without switching your phone off)
When something goes wrong
Who do I contact for a refund or a problem with my plan?
The provider you bought from. eSIM Guide is a comparison site, not a seller, so we cannot see your order, activate a plan, add data or issue a refund. If something on our site was wrong, such as a price or a plan's terms, tell us through the contact page and we will correct it.
My eSIM is installed but has no internet. What do I check?
In this order: the eSIM line is switched on; it is selected as your mobile data line; data roaming is on for that line; you are in a country the plan covers. If it still shows no data, restart the phone, then try picking a network manually in the line's settings, and check the APN against the one in your provider's instructions.
About eSIM Guide
Does eSIM Guide sell eSIMs?
No. We compare plans from many providers in one table, pulled directly from each provider's own data, and link you to the provider to buy. You pay the provider's normal price. More on who runs the site and how is on our about page.
How does eSIM Guide make money, and does it affect the rankings?
Some providers pay us a commission when you buy through our links, at no cost to you. Commission never orders the comparison tables, and we list providers that pay us nothing. The detail is in our affiliate disclosure.
How up to date are the prices?
Each provider's catalogue is re-read automatically, around once a day, so new plans, price changes and withdrawn plans follow quickly. Providers can still change a price between syncs, so always confirm the final price at the provider's checkout.
Can I search eSIM plans from ChatGPT or Claude?
Yes. Our free eSIM MCP server gives AI assistants such as Claude, ChatGPT and Cursor live access to the same plan data, so you can ask for the cheapest plan for a trip in plain language.
I run an eSIM company. How do I get listed?
You need two things: an affiliate programme and a plan feed or API we can sync automatically. The details, and the form to apply, are on our partners page. Once listed, your plans are compared on exactly the same terms as everyone else's.
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