The OpenSim journal

eSIM Research

Page 3

Original studies with downloadable data about travel connectivity, roaming costs and eSIM pricing.

More esim research

Ten of twenty major airlines explicitly say a saved mobile boarding pass works offline

Mobile Boarding Pass Offline Index: 20 Major Airlines Checked

We checked 20 major airlines for offline boarding-pass access, wallet saving, airport limits and phone-failure recovery. Explore the source-linked data.

20 Aug 2026

Only four of ten checked travel eSIM providers publish the full APN safety trio

eSIM Research

Travel eSIM APN Readiness Index: What 10 Providers Tell You Before You Land

We audited APN guidance from 10 travel eSIM providers. Compare automatic setup, plan-specific values, iOS and Android steps, safe edits and recovery.

17 Aug 2026

Eight of ten travel eSIM providers publish at least one automatic charge path while Roaming eSIM's checked offer remains prepaid

eSIM Research

Travel eSIM Auto-Renewal Index: Which Plans Can Charge You After Your Trip?

We audited 10 travel eSIM providers for recurring charges, renewal triggers, cancellation routes and notices. Explore the source-linked CSV before buying.

17 Aug 2026

Five of ten checked travel eSIM providers answer identity-check requirements across their catalog

eSIM Research

Travel eSIM Passport Check Index: Which 10 Providers Ask for ID?

We checked passport and ID guidance from 10 travel eSIM providers. Compare no-ID plans, conditional KYC, document timing, and unclear disclosures.

17 Aug 2026

eSIM Research

U.S. Carrier Unlock Index: How Soon Can You Use a Travel eSIM?

We compared 10 U.S. carrier unlock policies for travel eSIM use. Explore waits from 0 to 365 days, payoff rules, cutoffs and first-party sources.

17 Aug 2026

Nine of ten audited travel eSIM providers publish a self-service installation route outside their app, while Roaming eSIM and aloSIM publish direct, QR and manual app-free methods

eSIM Research

Do You Need an App to Install a Travel eSIM? A 10-Provider Audit

See which 10 travel eSIM providers let you install without their app, with dated evidence for browser, email, QR, one-tap and manual setup.

17 Aug 2026

Nine of ten travel eSIM providers publish a support route before purchase, while seven publish browser messaging and seven state continuous support hours

eSIM Research

Travel eSIM Support Access Index: What 10 Providers Publish Before You Buy

Compare the support hours, chat, email, access gates and self-service help published by 10 travel eSIM providers before you buy.

17 Aug 2026

Eight of ten sampled providers clearly support adding data to an installed eSIM

eSIM Research

Travel eSIM Top-Up Index: Which Providers Let You Add Data Without Reinstalling?

See which of 10 travel eSIM providers support same-profile top-ups, plus a 222-destination Roaming eSIM catalog audit and downloadable data.

13 Aug 2026

Only four of twelve European rail operators publish all six Wi-Fi planning facts checked in this study

eSIM Research

European Train Wi-Fi Transparency Index: What 12 Operators Tell You Before Boarding

We audited 12 European rail operators for Wi-Fi scope, price, login, limits, dependencies and help. Explore the source-linked CSV before your trip.

12 Aug 2026