An eSIM is a digital SIM card that is integrated into the smartphone. So you no longer need to insert a physical SIM card. Instead, the tariff is configured via a QR code or manually, conveniently and entirely online.

You order your eSIM online, receive installation instructions (e.g. via a QR code) and can activate it in just a few steps. In the US, your mobile phone then connects automatically to a local network, without having to change SIM cards.

It depends on the length of your trip, the amount of data you need and how you use your mobile phone. Holafly, for example, offers unlimited data, while airalo offers flexible volume-based packages. If you do a lot of streaming, it’s best to go for the unlimited option.

It is best to activate your eSIM just before the start of your trip or just after your arrival. This ensures that the validity period does not start before you really need it, which is ideal for time-limited packages.

Depending on the operator, your plan starts either as soon as it is activated on your smartphone or only when you first connect to the network in your destination country. You can find the details from each provider (e.g. Holafly or airalo).

You can easily buy an eSIM online. After placing your order, you will usually immediately receive a QR code or installation link that you can use to activate the eSIM directly on your device, without having to send anything.

Most recent smartphones are compatible with eSIM, for example iPhones from the XS model onwards, many Samsung Galaxy devices and Google Pixels. Before buying, you should check whether your model is compatible with eSIM, especially if it is an old or cheap device.
I have indicated the corresponding links in the comparison table above!

You can usually install an eSIM using a QR code: open the camera, scan the code, confirm, and that’s it. It is also possible to enter the eSIM details manually. You can get instructions directly from the provider.

It’s easy to set up: in your smartphone settings, select ‘Add mobile plan’, scan the QR code or enter the details manually. The eSIM is then immediately ready for use.

Most eSIMs are intended for single use. This means that they are valid for a specific period or until the data volume is used up. Depending on the operator, it is sometimes possible to reactivate or extend them.

On the iPhone, you will find the information under ‘Settings > General > About’. On Android devices, the information is usually found under ‘Connections’ or ‘SIM Manager’. You can also take a look at the manufacturer’s website.

Most eSIM plans use 4G/5G/LTE speed, depending on the local network (e.g. AT&T or T-Mobile). In cities, the connection is generally very good, but in rural areas such as national parks, it can fluctuate, as with any mobile connection.

Yes, some providers reduce the speed after a certain amount of usage, especially for very cheap or unlimited plans. Holafly, for example, offers a consistently high speed with its unlimited plans.

That depends on the operator. Many eSIMs use the major American networks such as AT&T or T-Mobile. Depending on where you are, your mobile phone will automatically connect to the best available network. This information is often indicated in the description of the package.

It depends on the operator: with Airalo, you can check your data usage in the app. Holafly does not offer this option, as you have unlimited data volume. With unlimited packages, you often receive information by text message or on your customer account.

With unlimited plans, the connection is interrupted or slowed down significantly as soon as the limit is reached. Some providers allow you to top up, others don’t. With unlimited plans like Holafly, you can simply continue surfing.

WhatsApp is not linked to the SIM card. If you continue with your new plan, your old number will be retained, whether you use an eSIM or not.

Most eSIMs for travellers are data-only plans. So you can’t make calls or send text messages directly, but you can communicate without problems via WhatsApp, FaceTime or other apps.

No, for eSIMs intended for the United States, you generally do not need to be verified, unlike physical SIM cards in some countries, for example. You can buy them directly and use them immediately.

Yes, if your device is compatible with dual SIM. For example, you can keep your normal SIM card for calls and use the eSIM for mobile internet – a handy combination for travelling.

Usually, you receive it immediately after purchase by email or in your customer account. You receive a QR code or activation link with which you can install the eSIM on your smartphone.

You can save the order email, take a screenshot of the QR code or retrieve the data in your customer account. Some providers also offer a download in PDF format.

With most operators, you can retrieve the QR code in your customer account or request it from customer service. So you don’t need to buy a new package straight away.

You can easily remove the eSIM in your mobile phone settings. On iOS, select ‘Mobile’ → eSIM → ‘Remove plan’. This has no impact on your normal SIM card.

Some providers offer the option to extend directly in the customer account. Otherwise, you can simply reserve a new eSIM for the desired period – installation is exactly the same as the first time.

It depends on the provider. Refunds are generally only possible if you have not yet activated the eSIM. It is best to always check the return conditions immediately after purchase. I have indicated the current situation in my eSIM comparison table.

Almost all providers accept credit cards. Many also accept PayPal, Apple Pay or Google Pay. Some also accept Klarna or other local payment methods.