eSIM Guide Pro
The big eSIM Guide 2026
What a eSIM is, how it works and which provider makes sense for your trip.
A eSIM is the easiest way to get online cheaply abroad - without a physical SIM card and without roaming costs. This guide explains everything: from the basics to the best providers and specific recommendations for every destination.
What is a eSIM?
A eSIM (embedded SIM) is a digital SIM card that is built directly into your smartphone. Unlike a classic SIM card, you don't have to insert a plastic card - instead, the tariff is loaded onto your device via QR-Code or an app.
This makes eSIMs particularly practical for traveling: You can buy a local data plan for your destination before you fly and be online as soon as you land. No waiting at the airport, no changing SIM cards, no expensive roaming.
Most modern smartphones (from iPhone XS, Samsung Galaxy S20 and newer) support eSIM. You can keep your normal SIM card and use eSIM as an additional data plan - so you can still be reached at your usual number.
Digital instead of plastic
No physical SIM card change necessary. The tariff is loaded digitally onto your smartphone.
Quickly activated
Set up via QR-Code or app in under 5 minutes - often even before the trip.
Ideal for traveling
Local data tariffs abroad without expensive roaming charges. Perfect for vacation and business.
eSIM in 5 steps
Select provider
Compare eSIM providers and choose the right one for your destination - e.g. Airalo, Holafly or Nomad.
Buy tariff
Buy your data plan online. You will immediately receive QR-Code or app access.
Install eSIM
Scan the QR-Code with your smartphone or install the eSIM via the provider app.
Activate on journey
Activate eSIM in your device settings and select it as the data plan.
Be directly online
After landing, your device connects automatically - you are immediately online.
Why eSIM?
Cheaper than roaming
A eSIM often costs only a fraction of the roaming charges. Save up to 90 % compared to your German mobile provider.
Available immediately
You can buy and set up the eSIM before your trip. After landing, you'll be online in seconds.
No physical SIM required
Keep your German SIM card in the device and use eSIM as a second data plan - your number will remain reachable.
Flexible for every destination
Whether USA, Thailand, Europe or Japan - there are suitable eSIM tariffs for almost every country in the world.
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.
eSIM does not work
The most common causes and solutions if your eSIM is not activated.
eSIM is not recognized
What you can do if your smartphone does not recognize the eSIM.
No net after landing
How to solve connection problems after arriving in your destination country.
Hotspot does not work
Why tethering sometimes doesn't work and which providers support it.
eSIM or SIM card?
When a eSIM is worthwhile and when a classic SIM is better.
Internet abroad without roaming
All the options for low-cost mobile Internet while traveling.
Which traveler are you?
For vacationers
You are traveling for 1-2 weeks and need internet for navigation, WhatsApp and social media. A eSIM with 3-5 GB is completely sufficient.
Recommendation: Airalo or Nomad with a small data package from €4.
For frequent travelers
You travel several times a year and need a flexible solution for different countries. Regional eSIMs are ideal.
Recommendation: Airalo with regional eSIM (Europe, Asia) for maximum flexibility.
For business trips
You need reliable Internet for video calls, emails and cloud work. Unlimited tariffs are the best choice here.
Recommendation: Holafly Unlimited for stress-free working without data limits.
For remote work / workation
You will be working from abroad for several weeks. Stable Internet with hotspot function is a must.
Recommendation: Holafly Unlimited (30+ days) or Ubigi with 50 GB and hotspot.
Frequently asked questions
What is a eSIM?
A eSIM is a digital SIM card that is built into your smartphone. It is activated via QR-Code or app - without a physical card.
Which smartphones support eSIM?
Most modern smartphones: iPhone from XS (2018), Samsung Galaxy from S20, Google Pixel from Pixel 3, and many other manufacturers.
Is eSIM safe?
Yes. eSIMs are just as secure as physical SIM cards and use the same encryption technology.
Can I keep my normal SIM card?
Yes, you use the eSIM as an additional data plan. Your normal SIM card and phone number remain active.
How much data volume do I need when traveling?
For normal vacations, 3-5 GB is sufficient. For remote work or streaming, we recommend 10+ GB or Unlimited.
Is eSIM cheaper than roaming?
Clear. A eSIM typically saves 80-90% compared to traditional roaming charges from German mobile phone providers.
How long does activation take?
Usually less than 5 minutes. You scan a QR-Code or install the eSIM via the provider app.
Does eSIM work everywhere in the world?
Almost. The major providers such as Airalo cover 200+ countries. There are suitable tariffs for most destinations.
Can I use hotspot/tethering?
Yes with some providers and tariffs. Ubigi supports Hotspot most reliably. Check the tariff details before purchasing.
What happens when my data volume is used up?
You can usually buy a new package at a later date. With Unlimited tariffs (Holafly) you have no volume limit.
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.