Travel eSIM guides

Straight answers to the questions travellers ask before buying an eSIM.

Basics

An eSIM is a digital SIM built into your phone. Learn how travel eSIMs work, what they cost and how to install one in minutes.

Compare a travel eSIM with your mobile carrier's roaming charges. See typical costs, convenience and when roaming still makes sense.

Find out if your iPhone, Samsung, Pixel or other phone supports eSIM, and whether it is carrier-unlocked.

Connected but no internet? Step-by-step fixes for a travel eSIM that won't connect: data roaming, APN, line selection and more.

An honest guide to choosing eSIM data: how much maps, social media, video calls and hotspot use, with sizes for weekends, weeks and longer trips.

Visiting several European countries? Compare single-country and Europe regional eSIMs, coverage and how much data to buy.

Japan eSIM guide: networks, how much data for a JR Pass trip, translation apps and why a data-only eSIM beats pocket Wi-Fi.

Thailand eSIM guide: how much data for 10 days, networks (AIS, True, dtac), islands coverage and Grab rides.

Compare US roaming charges with a prepaid USA eSIM, how much data you need for a road trip and which networks you'll use.

How ATravelSIM compares with Airalo, Holafly, Saily, Nomad and others — and the five things that matter most when choosing a travel eSIM.