eSIM Guides

How-tos, buying guides and eSIM education

Best eSIM for Mexico (2026): Plans, Prices & Coverage

A practical guide to choosing a Mexico eSIM in 2026: how Telcel, AT&T, and Movistar compare for coverage, what actually changes at the coast versus inland, and how to set up before you fly.

co:sim TeamJun 4, 202612 min

eSIM Guides

Best eSIM for India (2026): Plans, Prices & Coverage

A practical guide to choosing an India eSIM in 2026: how Jio, Airtel, and Vi compare, why installing before you land matters more here than almost anywhere else, and which plan fits your trip.

co:sim TeamJun 1, 202612 min

eSIM Guides

Best eSIM for Iceland (2026): Coverage for the Ring Road and Remote Travel

Planning Iceland's Ring Road or a remote highland detour? This 2026 guide compares Iceland eSIM choices, network coverage, data needs and setup timing.

co:sim TeamJun 1, 202610 min

eSIM Guides

How to Activate an eSIM on Samsung Galaxy (Step-by-Step)

Step-by-step Samsung Galaxy eSIM activation: the exact One UI menu path, which S, Z Fold/Flip, A-series, and Tab models support eSIM, QR vs. manual setup, and the carrier-lock quirk that blocks activation on some US models.

co:sim TeamMay 20, 20268 min

eSIM Guides

How Much Mobile Data Do You Need for a Week-Long Trip?

A day-by-day framework for sizing mobile data on a one-week trip: real usage benchmarks by activity, a simple multiply-by-seven formula with buffer, and which data tier, light, medium, or heavy, fits your travel style.

co:sim TeamMay 18, 20268 min

eSIM Guides

eSIM vs Physical SIM: Which Should You Use When Traveling?

eSIM and physical SIM both connect your phone to a network, but one downloads a profile over the air and the other slots into a tray. Here's what that difference means for choosing a format before your next trip.

co:sim TeamMay 9, 20268 min

eSIM Guides

Dual eSIM Explained: What It Is and How It Works for Travel

Dual eSIM means your phone runs two SIM profiles at the same time, typically your home line for calls and texts and a travel eSIM for data. Here's how the technology works, what iPhone and Android actually support, and how to set it up correctly before a trip.

co:sim TeamMay 7, 202610 min

eSIM Guides

Is My Phone eSIM Compatible? How to Check Device & Carrier-Lock Status

eSIM hardware support and carrier lock are two separate checks people constantly confuse. Here's exactly where to look on iPhone and Android, plus whether a locked phone can still use a travel eSIM.

co:sim TeamApr 30, 20269 min

eSIM Guides

How to Transfer Your eSIM to a New Phone (iPhone & Android)

iPhone's eSIM Quick Transfer moves your plan over the air, but Android has no universal transfer feature and travel eSIMs like co:sim's need a fresh QR code on the new device. Here's what actually works, platform by platform.

co:sim TeamApr 28, 202612 min

eSIM Guides

Free eSIM Trial, No Credit Card: How to Actually Get One

Most "free eSIM trial, no credit card" offers are real, but many still collect a card for identity verification, even at $0. Here's what to actually expect, and exactly how co:sim's own free trial works.

co:sim TeamApr 26, 202610 min

eSIM Guides

Best eSIM for Greece (2026): Island Coverage, EU Roaming and Data Plans

A practical Greece eSIM comparison for Athens, the islands and EU itineraries, with honest data-plan guidance, setup steps and roaming context.

co:sim TeamApr 25, 20269 min

eSIM Guides

Best eSIM for New Zealand (2026): Coverage for Both Islands and Campervan Routes

A practical New Zealand eSIM comparison for 2026, with network coverage advice for Auckland, both islands, Great Walks and campervan drives.

co:sim TeamApr 15, 202610 min

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