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co:sim ONE cardInstall it once. Land connected in 200+ destinations.

No new eSIM before every flight. Top up when you need to, pay for the megabytes you actually use, and keep what is left for the next trip.

Install once
Add the eSIM a single time. Every trip after that starts with nothing to set up.
200+ destinations
One profile handles a weekend away and a six-month route the same way.
Strongest network, 4G/5G
Roams onto the national carriers locals use, chosen per destination for signal.
Billed by the megabyte
From $0.0015/MB. No daily fee. Nothing to pay to open the card.
See every rate
United States
United States$0.0020/MB
United Kingdom
United Kingdom$0.0024/MB
France
France$0.0024/MB
Spain
Spain$0.0024/MB
Italy
Italy$0.0024/MB
Germany
Germany$0.0024/MB
Japan
Japan$0.0025/MB
South Korea
South Korea$0.0025/MB
Thailand
Thailand$0.0030/MB
Singapore
Singapore$0.0030/MB
United States$0.0020/MB
United Kingdom$0.0024/MB
France$0.0024/MB
Spain$0.0024/MB
Italy$0.0024/MB
Germany$0.0024/MB
Japan$0.0025/MB
South Korea$0.0025/MB
Thailand$0.0030/MB
Singapore$0.0030/MB
Setup

Set it up once. Then stop thinking about it.

  • Opening the card costs nothing. There is nothing to buy first.
  • The eSIM profile goes on your phone one time. No new profile before the next trip.
  • Top up from $5 whenever you like — the first one comes with a welcome surprise.
Free · To open the card
Connection

Connects to the strongest network available, on 4G/5G

The same national carriers locals use — 200+ of them, chosen per destination for signal.

VodafoneMovistarClaroTelenorSunriseVerizonBouyguesVodafoneMovistarClaroTelenorSunriseVerizonBouyguesVodafoneMovistarClaroTelenorSunriseVerizonBouyguesVodafoneMovistarClaroTelenorSunriseVerizonBouygues
OrangeAirtelO2ElisaEtisalatMelitaAT&TOrangeAirtelO2ElisaEtisalatMelitaAT&TOrangeAirtelO2ElisaEtisalatMelitaAT&TOrangeAirtelO2ElisaEtisalatMelitaAT&T
Global access

One card. Every trip.

  • 200+ destinations on one profile. The card goes wherever the itinerary does.
  • Plans change mid-trip? Land somewhere else and it keeps working.
  • Every one of the 203 launch rates is published on the coverage page. Look yours up before you go.
See rates on the coverage page
MexicoPeruCosta Rica
IcelandNorwaySwitzerland
MoroccoUAEKenya
VietnamIndonesiaPhilippines
200+destinations
Billing

Every destination. One published rate.

$0.0015/MBfrom — you pay for what you use
  • One published per-GB rate per destination, and your traffic is metered in megabytes.²
  • No daily fee, no monthly fee. A card you are not using costs nothing.
  • Bigger trip ahead? Add a data pack and the rate drops.

What gets used first

Always the cheapest data you hold: destination pack → region pack → global pack → reward data → low-speed fallback. Your PAYG balance comes last, and only if you switch it on.

Packs, for when you want a lower rate

Destination packs

30 days

1, 3 or 5GB for a single destination — roughly 20–35% under PAYG.

Region packs

30 days

One pack across a whole region. Built for multi-stop routes through Europe, Asia-Pacific, North America or the Middle East.

Global packs

30 days

One pack. Every standard destination.

Optional, on top of pay-as-you-go. The 30 days start the first time you connect.

Flexibility

The balance belongs to your account, not to one phone.

  • Top up, spend or redeem, and the 24-month clock restarts.
  • New phone? One free reissue per card year, then $1.99.⁴
  • Changed your mind before installing? Full refund within 30 days.³
Stays valid¹
Account balance
1 free
reissue per card year
30 days
full refund before install
At launch

How the ONE card works

It is an account, not a plan. One eSIM holds your balance and your packs, everywhere we cover.

1

Open it free

Nothing to buy to get started. The card becomes the account every future trip runs on.

2

Top up from $5

Add credit whenever it suits you — there is a welcome surprise on your first one. What you do not spend waits for the next trip.

3

Land and go online

Billed by the megabyte at the destination’s published rate. No daily fee. Add a pack any time for a lower one.

Product summary

  1. 1Your balance stays valid as long as the account sees any activity within 24 months — top up, spend, or redeem and the clock resets. Data packs are valid 30 days from activation.
  2. 2Transparent per-destination pay-as-you-go rates; the full table lives on the coverage page.
  3. 3Uninstalled cards refund in full within 30 days. After installation the card itself is no longer refundable, but the most recent balance top-up still is, minus an administrative fee — see the refund policy. Statutory consumer rights that cannot be excluded are unaffected.
  4. 4One free eSIM reissue per card year, then $1.99 per swap.
  • co:sim ONE card is a data-only travel eSIM, carried over third-party mobile network partners. It has no phone number, no voice service, no SMS and no emergency calling.
  • No monthly fee, no daily fee, no activation fee. The card itself is free — you pay for the data you use and the packs you choose to buy.
  • Data stops when your balance reaches zero. We warn you before it does, and we never advance credit or charge your payment method automatically — top up or buy a pack and you are back online.
  • A pack keeps for up to 24 months before you activate it, then runs 30 days from activation — activation being your first connection inside that pack’s coverage.
  • Network profile: in most destinations we attach to the strongest network available, supporting 4G and 5G NSA, with a bearer of QCI 8 (AMBR 1000/1000 Mbps) or QCI 9 (AMBR 600/300 Mbps). Real throughput depends on your device, the local partner network and roaming conditions at the time — speed is not a promise and is not on its own a ground for a refund.
  • This is a pre-launch summary. The terms of service published at launch govern; after that we give at least 30 days’ notice by email or on-site notice before any material change.
  • This page summarises the product. The contract in force when you buy governs, and where translations differ the English version prevails.

Travelling a lot next year?

Up to 116GB out there — 1GB in each of 112 destinations, plus 4.5GB in milestones. Check in and earn more.

Meet the Challenge Card

Need data today?

Our one-off eSIM plans are on sale right now in 200+ destinations.

Browse Data-Only plans

ONE card FAQ

When does the ONE card launch?+
Alongside the Challenge Card. Leave your email above and we write once, on the day.
Is there a monthly fee?+
No. No monthly fee, no daily fee, nothing to pay to open the card. You pay for the data you use and the packs you buy.
What happens to money I have not spent?+
It stays on your account. Any top-up, spend or redemption keeps the balance valid for another 24 months. Data packs run 30 days from activation.
How is pay-as-you-go billed?+
By the megabyte, at the destination’s published per-GB rate. Those rates are final launch prices.
Can I get a refund?+
Yes — full refund within 30 days, as long as the eSIM profile has not been installed. Once it is installed the card itself is no longer refundable, but you can still refund your most recent balance top-up, less an administrative fee.

Get the ONE card first

Leave your email and you will know the day it opens — before it is announced anywhere else.

co:sim logo

200+ destinations, connected the moment you land. Not installed yet? Self-service refund within 30 days.

support@cosim.ioWhatsApp +1 626-241-4369

Products

  • ONE card
  • Challenge Card
  • Data Only
  • Regional eSIM
  • Free eSIM for New Users
  • Use with AI Assistant

Resources

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  • Installation Guide
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Legal

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Accepted payment methods

Secure payments processed by Stripe. Availability varies by region, currency, and device.

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