co:sim is listed for travelers who want to compare destination coverage, data allowance, validity, hotspot support, and current eSIM prices before checkout.
co:sim is listed for travelers who want to compare destination coverage, data allowance, validity, hotspot support, and current eSIM prices before checkout.
Tap a destination to see co:sim's plans and prices there.
How co:sim compares with providers we also list — by the numbers.
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Travelsim Asia 
Nomad eSIM co:sim works on any eSIM-capable, carrier-unlocked phone. Common examples:
Tip: open Settings and look for "Add eSIM" or "Add cellular plan" to confirm your device supports eSIM. Your phone must also be carrier-unlocked.
You buy directly on cosim.io — the whole flow is web-based, with no companion app in sight. Checkout runs through Stripe and accepts cards, Apple Pay, Google Pay, Alipay, WeChat Pay and Amazon Pay (availability varies by region, currency and device). After purchase, the eSIM QR code is stored in your co:sim account: scan it with your phone to install (ideally before departure), and the plan activates automatically when you arrive at the destination and connect to a supported network. Watch the pre-installation window — each eSIM must be installed within its validity period, and once that deadline passes an unscanned eSIM is no longer eligible for a refund. Top-ups for reloadable plans are handled from the same account dashboard where your purchased eSIMs are stored.
No traveler reviews for co:sim yet — we only publish real, moderated experiences, never invented ones. Used co:sim on a trip? Yours can be the first.
On our live tracker, co:sim lists 1985 plans covering 191 countries, and the cheapest live plan currently costs $0.99. That entry price makes it one of the cheaper starting points we track, though the right pick depends on how much data your destination plan bundles for the price.
Every current co:sim plan is strictly data-only — no phone number, calls or SMS — and we track no unlimited-data plans in its catalog, so you pick a fixed data bucket sized to your trip. co:sim does advertise a second product, Global Prepaid, as coming soon: pay-as-you-go data billing across 200+ destinations, but it is also data-focused rather than a voice plan.
You install the eSIM by scanning a QR code from your co:sim account, and the plan then activates automatically when you arrive at the destination and connect to a supported network — so installing before departure doesn't waste days. Two things to check per plan: some plans marked at checkout begin their validity immediately at purchase, and every eSIM has a pre-installation window — once it passes, an unscanned eSIM is no longer refund-eligible.
If you haven't scanned the QR code yet, you can trigger a refund yourself from the "My Plans" section of your account within 30 days of purchase — no support ticket required. It's limited to 2 self-service refunds per calendar month, and installed eSIMs, used data and plans past the 30-day window need a case-by-case request via support instead. Card refunds land in 5-10 business days; Alipay and WeChat Pay in 3-7.
Checkout is processed by Stripe and accepts credit and debit cards, Apple Pay, Google Pay, Amazon Pay, and — unusually for a travel eSIM seller — Alipay and WeChat Pay. Availability can vary by region, currency and device, and refunds are always returned to whichever method you originally paid with.
