Stay connected abroad without overpaying
Signal Atlas is an independent, research-based guide to travel eSIMs. We read providers' official pages, restate the facts in plain English, show our sources and dates, and tell you where the catches are.
How we work
- Sources, not hype. Every price links to the official page we read and the date we checked it.
- No invented testing. We don't publish speed tests or "hands-on" reviews we didn't do.
- Clear disclosure. Some links are affiliate links; here's how that works.
Guides
What Is an eSIM, and Does Your Phone Support One?
A plain-English explanation of travel eSIMs, how they differ from SIM cards, and a step-by-step way to check whether your iPhone or Android phone can use one.
Airalo vs Nomad vs Saily vs Holafly: An Honest 2026 Comparison
How four popular travel eSIM providers compare on price, plan types, unlimited-data rules and extras, using prices taken from their official pages in November 2026.
Best eSIM for Japan (2026): Prices Compared and How to Choose
Japan travel eSIM options from Airalo, Nomad, Saily and Holafly compared by price per trip length, networks and fair-use rules, with prices checked on official pages in November 2026.
Best eSIM for Europe (2026): Regional Plans Compared
Compare Europe-wide travel eSIM plans from Airalo and Holafly, what 'Europe' coverage really includes, and how to avoid paying for unlimited data you won't use.
Best eSIM for Thailand and Southeast Asia (2026)
Thailand travel eSIM prices from Airalo, Holafly and Saily compared, plus when a Southeast Asia or Asia regional plan makes more sense.
eSIM vs Pocket WiFi vs International Roaming: Which Should You Use?
A neutral, practical comparison of travel eSIMs, pocket WiFi rentals, home-carrier roaming and local SIM cards — cost structure, convenience and who each option suits.
How to Install a Travel eSIM on iPhone and Android, Step by Step
Clear installation steps for travel eSIMs on iPhone and Google Pixel/Android, based on Apple and Google's official help pages, plus the settings to change when you land.
Free eSIM Trials in 2026: Nomad, GigSky and Yesim Checked
What the Nomad, GigSky and Yesim trial eSIMs actually include, according to their official pages in November 2026 — data, validity, eligibility and the catches.