Live in 186 countries · activate in minutes
Connect the moment you land.
Install your eSIM before you fly — one tap or one scan — and your phone works the second you step off the plane. No roaming, no airport SIM queues, no surprise charges.
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Trusted global infrastructure
- Vodafone
- O2
- AT&T
- T-Mobile
- Orange
Invite a friend — both of you get €5.00 off your next plan.
Get your invite linkWhy Sīrū
Three reasons the phone just works.
- 01Never caught offline
Low on data? We text you a top-up link.
The second you hit 80% — or your plan is about to expire — we SMS a one-tap top-up link. No logging in, no digging through an app. Two taps, back online, keep moving.
- 02No roaming games
What you see is what you pay.
Plans are per-destination, per-duration. No minutes, no overage traps, no mystery charges the day after you land. If a plan is €12, you pay €12 — end of story.
- 03Works where you actually go
Tier-1 carriers. Reliable coverage where you travel.
We connect you to trusted local carrier networks like Vodafone, O2, AT&T, and T-Mobile, so you get reliable coverage in cities, on ferries, and outside the main tourist areas.
How it works
Three steps. Sixty seconds. On.
No SIM swap. No carrier shop. No waiting until day two for the card to arrive.
- 01
Pick your destination
Search the country and the length of your trip. Sīrū suggests the right data amount for how you actually travel.
- 02
Pay and get your QR code
Check out in under 30 seconds. Apple Pay, Google Pay, or card. Your eSIM QR code arrives by email and in-app.
- 03
Scan when you arrive
Open the QR code on your phone, scan once, and you’re on. Average time from scan to signal: 45 seconds.
In travelers' own words
In travelers’ own words.
“Landed in Tokyo, scanned the QR while waiting for my bag, and I was on. No airport SIM kiosk, no bill shock a week later.”
“I used to travel with a second phone for foreign SIMs. Sīrū killed that habit in one trip. The 10 GB Europe plan covered me through five countries.”
“Bought a plan in the Uber from JFK. Done before the driver hit the Brooklyn Bridge.”
Questions, answered
What travelers ask.
Every iPhone from XR onward, every Pixel from 3 onward, and most Samsung Galaxy S20+ and later support eSIM. If you bought your phone new in the last four years, the answer is almost certainly yes. Your phone also has to be carrier-unlocked.