Discover OneSIM
OneSIM by eSIM io offers an eSIM valid worldwide with pay-as-you-go payment option
One eSIM valid in over 160 countries
Pay‑as‑you‑go or choose a 30-day data plan
io Balance never expires
Popular Countries
Seamless Connection in Any Country You Visit
Why eSIM io?
This Is What Our Users Say
Punishments
No issues at all
I bought it for half the price of other service providers, used it on a trip to Copenhagen in April 2025, and had no problems. I just have to recommend it. I was very satisfied.
Murat Yılmaz
Kudos to whoever did this
Kudos to whoever did this. I had no problems at all, I downloaded the program a week before going abroad. I chose the country I was going to and bought an internet package. It said it was waiting for activation. I started using internet as soon as I enter
Yasemin Ertepe
Great price and smooth connection
I travel a lot and always use eSIM io. It is affordable, easy to install, and works everywhere. Very practical for those who travel a lot. I definitely recommend it.
The Tetik
Amazing!
I bought 10 gb data for around $13. I use it in Germany. It is very efficient and was activated immediately. I felt the need to write this just as a guide for new users. iOS users, turn on international roaming from the settings when installing, otherwise
Ömer Maşalı
It is a very nice application
It is a very nice application, it gives you $5 on your first login, which means you get 3GB data for free (for 30 days) It will come in handy in difficult times, thanks again eSIM♥️
Akın Gürleyen
Great and affordable
Great and affordable
hsn_brk
Flawless Experience
Its installation and package selection are practical and its international internet connection and call quality is high.
Airdem737
Good coverage
I am pilot and i use it on several different contries during my flights. It worked good at all.
Mustafa Nazman
A great app
A great app that was a great help in our trip to Spain without any problems...
Use eSIM io mobile app for a better eSIM experience.
To download the app, open your phone's camera and scan the QR code. The eSIM io mobile app offers a great experience for usage notifications and balance managing and tracking.
How Does eSIM io Work?
Download the eSIM io app
Pay as you go or purchase a plan
Top up io Balance to your account
Add OneSIM to your phone just once and do not remove it
Easily track your usage