Travel eSIM guides

Eighteen straight answers to what people actually ask before buying data abroad. No fluff, no affiliate padding — including the parts that are inconvenient for us.

❓ What Is an eSIM

What it is, how installing one works, and the honest limitations.

⚖️ eSIM vs SIM Card vs Pocket WiFi vs Roaming

Travel eSIM, roaming pass, local SIM or pocket WiFi — what each really costs.

📊 How Much Data Do I Need for a Trip

What an hour of maps, Instagram or Netflix actually costs in MB.

📱 Which Phones Support eSIM

The model list, plus a 10-second check that beats any list.

📲 How to Install an eSIM on iPhone or Android

Install it in two minutes, and the arrival step that catches everyone out.

🍎 eSIM on iPhone

One-tap install, which line does what, and the switch to turn off.

🤖 eSIM on Android

Where the menu hides on Samsung, Pixel, Xiaomi and the rest.

🛠 eSIM Installed but No Internet

Signal but no internet? Six causes, ranked by how often they are it.

💸 How to Avoid Roaming Charges While Using a Travel eSIM

The switches that stop your own carrier billing you.

🔗 Do I Keep My Phone Number, WhatsApp and iMessage with an eSIM

Your number, WhatsApp, iMessage and bank codes all keep working.

🔁 Can You Transfer an eSIM to Another Phone

Why it cannot move phones, and what to do if you got it wrong.

🇨🇳 Does an eSIM Work in China

Why Google and WhatsApp normally work on roaming, without a VPN.

🇯🇵 Getting Internet in Japan

eSIM vs pocket WiFi vs airport SIM, and what free WiFi is really like.

🇪🇺 One eSIM for All of Europe

One plan, 30+ countries — and the two traps in 'Europe' plans.

🇺🇸 Mobile Data in the USA for Visitors

Great in cities, real dead zones between them. Plan for it.

⚖️ Airalo Alternative

Same 20 GB plan, Airalo vs us, prices from a comparison site with the date on it.

🥊 Airalo vs Holafly vs Saily

The three big brands side by side on one spec — and a fourth column.

🇯🇵 Best eSIM for Japan

Four brands, same networks, price per GB. Japan is where the gap is widest.

Start here if you are new to eSIM

An eSIM is a SIM card built into your phone. Instead of a plastic card, you install a plan by scanning a QR code or tapping a link — which means you can buy data for your destination from your sofa, before you fly, and land already connected.

If you have never used one, read whether your phone supports it first, then how much data to buy, then how to install it. That is the whole thing — about ten minutes of reading and two minutes of setup.

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