co:sim
eSIMTravel eSIM with a free 1GB/7-day trial for new users across 33 European countries and Asian destinations
Overview
co:sim (operated by Comsand Inc., Wilmington, DE, USA) is a travel eSIM service covering 200+ destinations. Its standout offer is a free eSIM for new users: a 1 GB / 7-day trial covering 33 European countries as one regional bundle, with separate free allocations for Turkey, Moldova, Singapore, Malaysia, Indonesia, Japan, Thailand, South Korea and Hong Kong. The trial requires $0 at checkout but card verification, and installation QR codes are delivered by email. Top-ups are available anytime, payments run through Stripe, and uninstalled purchases qualify for self-service refunds within 30 days.
How the free trial works
Claim the free eSIM on cosim.io/en/free-esim with an email address — community guides recommend mainstream providers (Outlook/Gmail/Yahoo) over disposable inboxes, as throwaway addresses tend to fail verification. The site emails an installation QR code; scan it to install the profile, then top up in-app if you need more data. The Europe allocation works as one 33-country bundle, while Japan, Hong Kong, South Korea, Thailand, Singapore, Malaysia, Indonesia, Turkey and Moldova each get their own allocation.
What to watch for
Card verification is required even at $0 checkout, so a valid card is a hard prerequisite. Hotspot/tethering behavior is not documented officially. As a newer operator, long-term reliability is unproven — the 30-day refund only applies to purchases that were never installed, not to used trials.
Popular plans
| Plan | Data from | Validity | Price |
|---|---|---|---|
| Free trial (new users) | 1GB | 7 days (Europe 33-country bundle; separate allocations for JP/HK/KR/TH/SG/MY/ID/TR/MD) | $0 at checkout (card verification required) |
Free-trial terms verified on cosim.io/en/free-esim (2026-10-12): $0 at checkout, card verification, new users only. Operator per site footer: Comsand Inc., 800 N King Street, Wilmington, DE. The provider is young with a short operating history — treat the free trial as a try-before-you-buy, not a long-term number.
Pros
- Genuinely free 1GB trial with a wide 33-country European bundle
- Email QR delivery makes installation simple
- 30-day refund window for unused purchases
Things to note
- Card verification required even for the $0 trial
- New users only; unclear whether the offer recurs
- Young operator (Comsand Inc.) with a short track record
- 1GB/7 days is a taster — real usage needs paid top-ups
Key features
- Free 1GB/7-day trial for new users
- Europe 33-country regional bundle
- QR code delivered by email
- Stripe checkout
- 30-day self-service refund if not installed