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How Long Before Your Flight Should You Install Your eSIM?

Installing an eSIM early is safe; activating it early can burn paid validity days. Here's the real difference between the two steps, and when to do each before a flight.

co:sim TeamSep 21, 20267 min

How-To

How to Compare eSIM Plans Before Buying: A 4-Point Checklist

Before buying an eSIM plan, check four things: data amount, validity period, hotspot/tethering support, and which network it actually runs on. Here's what to look for on any plan page, with co:sim's own listings as an example.

co:sim Team

Sep 20, 2026

7 min

How-To

How to Switch eSIM Providers Mid-Trip (If Your Plan Runs Out)

If your eSIM data runs out or the connection underperforms mid-trip, you don't need to remove anything. Here's how to install a new eSIM from a different provider alongside it, step by step, with what to check first.

co:sim TeamSep 19, 20267 min

How-To

How to Cancel or Get a Refund for an eSIM

How eSIM refunds actually work: the install-based eligibility rule, what disqualifies a request, and the steps to request a refund before you buy again.

co:sim TeamSep 18, 20269 min

How-To

Can You Use an eSIM on a Laptop? (Windows PC, Step by Step)

An eSIM only works on a laptop with an actual WWAN cellular modem, not on every Windows 11 PC. Here's how to check if yours qualifies, which models genuinely have the hardware, and the exact steps to install a data-only eSIM.

co:sim TeamSep 17, 20268 min