Knowledge & orientation
What is a eSIM?
The digital SIM card explained simply - everything you need to know.
Have you heard of eSIM, but are unsure exactly what it is and whether it's worth it for you? Find out everything here: how a eSIM works, what advantages it offers and why it's an ideal solution for travelers in particular.
eSIM simply explained
eSIM stands for 'embedded SIM' - a SIM card that is permanently installed in your smartphone. Instead of a small plastic card that you insert into a slot, the mobile phone tariff is loaded digitally onto a chip in your device.
The advantage: You can activate, change and manage tariffs via QR-Code or app - without having to physically swap cards. This is particularly practical when traveling, where you need a local data plan quickly.
The technology is not new: smartwatches and tablets have been using eSIM for years. Since 2018, most smartphones have also supported eSIM - starting with the iPhone XS and Samsung Galaxy S20.
Permanently installed
The eSIM is a chip in your smartphone. You don't need an extra card - the tariff is loaded digitally.
Multiple profiles
You can save several eSIM profiles and switch between tariffs - ideal for different destinations.
Future-proof
More and more devices and providers are relying on eSIM. The technology is becoming the new standard.
eSIM in 5 steps
Check compatibility
Make sure that your smartphone supports eSIM (iPhone from XS, Samsung from S20, etc.).
Select provider
Compare eSIM providers such as Airalo, Holafly or Nomad and choose a tariff.
Install eSIM
Scan the QR-Code or use the provider's app to set up the eSIM on your device.
Adjust settings
Activate eSIM as a data tariff in your smartphone settings.
Loss surfing
Your device connects automatically - you are online without having to change your SIM card.
Why eSIM?
Saves money
Local eSIM tariffs are significantly cheaper than roaming charges from your home provider.
Ready for immediate use
Installation takes less than 5 minutes. You can prepare the eSIM before your trip.
Dual SIM capable
Use eSIM and normal SIM at the same time - your phone number remains active.
Usable worldwide
eSIM tariffs are available for over 200 countries - from the USA to Europe and Asia.
Best eSIM providers
Our top recommendations compared.
Airalo
Worldwide eSIM with over 200 countries, fast activation and flexible data packages.
- 200+ countries covered
- Top-rated app
- Fast activation
Nomad
Inexpensive eSIM with stable performance for budget travelers.
- Low rates from € 5
- 100+ countries
- Simple setup
Holafly
eSIM with unlimited data volume for stress-free travel.
- Real unlimited data
- Ideal for longer trips
- No data limit
Common issues & solutions
What to do when your eSIM doesn't work.
Is my smartphone compatible?
To check whether your device supports eSIM.
eSIM vs. physical SIM
When which variant is the better choice.
Can I use several eSIMs?
How to switch between different eSIM profiles.
eSIM does not work
The most common problems and how to solve them.
eSIM on new cell phone
How to transfer your eSIM to a new smartphone.
Delete eSIM
How to safely remove a eSIM profile from your device.
Which traveler are you?
For technology beginners
eSIM sounds complicated, but it's super simple. Just scan QR-Code and you're done. No tools, no card exchange.
Tip: Start with Airalo - the app guides you step by step through the setup.
For travelers
Whether you're on a beach vacation or a city trip - with a eSIM you're online immediately. No more searching for SIM cards at the airport.
Tip: Buy the eSIM at home and activate it after landing.
For business people
Reliable Internet for e-mails, calls and cloud tools - without a roaming bill at the end.
Tip: Holafly Unlimited for carefree working on the move.
For digital nomads
Different countries, one device. With eSIM you can switch flexibly between local tariffs.
Tip: Use regional eSIMs from Airalo for several countries with one tariff.
Frequently asked questions
What exactly is a eSIM?
A eSIM is a digital SIM card that is permanently installed in your smartphone. Tariffs are activated via QR-Code or app - without a physical card.
Do I need a special app?
Mostly yes. Providers such as Airalo and Holafly have their own apps for purchase and installation. Alternatively, a QR-Code also works.
Can I keep my normal number?
Yes, the eSIM is used as an additional data plan. Your main SIM and phone number remain active.
Does eSIM work with my iPhone?
Yes, from iPhone XS (2018) and newer. iPhone 14 US models even only have eSIM.
Is eSIM the future?
Yes, more and more manufacturers are relying on eSIM. Apple has already abolished the physical SIM tray in the USA.
What does a eSIM cost?
Tariffs start from around €4. Unlimited data is available from around €19. Significantly cheaper than roaming.
Can I delete the eSIM again?
Yes, you can remove eSIM profiles at any time in your smartphone settings.
How many eSIMs can I store?
Most smartphones store 5-10 eSIM profiles. You can usually use 1-2 actively at the same time.
eSIM country guides
Find the right plan for your destination.
eSIM USA
The best eSIM plans for the USA
View guide
eSIM Europe
Compare eSIM providers for Europe.
View guide
eSIM Thailand
Cheap online in Thailand.
View guide
eSIM Japan
Online in Tokio, Kyoto and Osaka.
View guide
eSIM Dubai
The best eSIM options for the VAE.
View guide
eSIM Bali
Surf carefree on Bali.
View guideReady for your eSIM?
Compare the best providers and find the perfect plan for your trip.