O2 eSIM for travelers
Our travel eSIM plans connect to the O2 network in 3 countries. If you searched for an eSIM for O2 coverage on a trip, this page explains exactly what we sell and where it works.
We are not O2
eSIMion is not O2, and we do not sell O2 SIM cards, O2 plans, or O2 top-ups. If you are a O2 customer looking for your own account, contact O2 directly.
What we sell is a prepaid travel eSIM. In the countries listed below, that eSIM connects to the O2 network for data. You get local coverage without a O2 contract, a store visit, or a local sign-up.
How a travel eSIM on the O2 network works
You buy the plan before your trip and it arrives by email with a tap-to-install link and a QR code. When you land, your phone connects to O2's towers (or a partner network, depending on the country) and data works. Your home SIM stays in place and your number does not change.
Where O2 has built out 5G, you get 5G on supported plans. Elsewhere you get 4G, which is fine for maps, messaging, and video calls.
The plan is data only. It does not come with a local phone number, so calls and texts to your regular number still arrive through your home SIM.
Where our plans use the O2 network
Plans that connect to O2 are available for Czechia, Germany and Slovakia. Each country page lists the plan sizes and what the network is like on the ground.
Get a plan matched to your trip
Forward your flight or hotel itinerary to trips@get.esimion.com and receive your eSIM in your inbox. We reply with four options — Best Coverage, Best Value, Lowest Price, and Global Simplicity — and you choose what matters most.