Onesim: eSIM for Travel

Onesim

About this app

Onesim — Global eSIM for Travel

Skip the SIM card hassle. Get instant mobile data in 190+ countries with Onesim eSIM. Activate in minutes, pay less than competitors, and stay connected wherever you go — no physical SIM, no roaming fees, no surprises.

★ INSTANT ACTIVATION
Buy, scan the QR code, and go online in under 2 minutes. No waiting, no store visits, no SIM swapping.

★ 190+ COUNTRIES COVERED
From Europe and Asia to Africa and the Americas — Onesim works in more than 190 destinations. One app. One eSIM. Every trip.

★ BEST PRICE GUARANTEE
Found a cheaper plan on Airalo, aloSIM, Nomad, Saily, or Yesim? We’ll match it — or beat it. You’ll always get the best deal on Onesim.

★ MONEY-BACK GUARANTEE
If your eSIM doesn’t work as promised, we’ll refund you in full. Fast, simple, no questions asked.

★ FLEXIBLE DATA PLANS
Pick the plan that fits your trip:
• Lightweight plans from just a few GB for short getaways
• Regional bundles for multi-country trips
• Unlimited data plans for streaming, video calls, and remote work
Top up anytime, right inside the app.

★ KEEP YOUR NUMBER
Use Onesim eSIM for data while keeping your primary SIM active for calls and SMS. Never miss an important message from home.

★ NO ROAMING FEES
Avoid the shock of post-trip roaming bills. Onesim gives you local-rate data wherever you travel.

★ EASY TO USE
A clean, simple interface designed for travelers. Browse plans by country, purchase in seconds, and manage everything in one place — balance, usage, top-ups, and history.

★ SUPPORT WHEN YOU NEED IT
Real human support, available when you travel. We’re here to help, day or night.

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HOW IT WORKS
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1. Choose your destination in the app
2. Pick a data plan that fits your trip
3. Pay securely with card or Google Pay
4. Scan the QR code to install your eSIM
5. Enjoy instant mobile data abroad

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PERFECT FOR
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• Tourists and backpackers
• Business travelers
• Digital nomads and remote workers
• Students studying abroad
• Frequent flyers
• Anyone tired of expensive roaming

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DEVICE COMPATIBILITY
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Onesim works on all eSIM-compatible Android smartphones. Make sure your device supports eSIM and is carrier-unlocked before purchase.

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WHY ONESIM?
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✓ Lower prices than Airalo, aloSIM, Nomad, Saily, Yesim
✓ Transparent pricing — no hidden fees
✓ Instant delivery by email and in-app
✓ Secure payments
✓ Full refund if something goes wrong
✓ Trusted by travelers worldwide

Download Onesim today and turn your phone into a global data SIM — for every country you visit.

Questions or feedback? Contact us at [e-mail]

What’s new

Initial release of Onesim.