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Field notes for connected travel

Travel eSIM guides and mobile data advice.

Clear answers about eSIMs, roaming, phone settings, and staying online abroad—written for the moment before you buy and the moment after you land.

Featured guide

How to Choose the Best eSIM for Greece

A practical Greece eSIM guide for Athens, island ferries, island coverage, EU roaming, device checks, data needs, and activation.

Travel planningBy ZEN9 min read
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ZEN / field notes

Signal / 05

Travel planning

PlanConnectTravel

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Start with the question.

Every guide is organized around a real travel decision, with short answers first and detail when you need it.

01 guides

eSIM basics

Start with the technology, compatibility, and setup fundamentals.

27 guides

Travel planning

Plan data, settings, and arrival-day connectivity before takeoff.

02 guides

Comparisons

Compare common ways to connect and choose for the actual trip.

All guides

Build a calmer travel day.

Start with the technology, estimate your data, compare connection options, and lock down the settings that prevent surprise roaming.

Travel planning

Choose a Portugal eSIM

A practical Portugal eSIM guide for Lisbon, Porto, the Algarve, Madeira, the Azores, device checks, data needs, and activation.

/8 min
Travel planning

Choose a South Africa eSIM

A practical South Africa eSIM guide for city breaks, Garden Route drives, safari planning, device checks, RICA caveats, and activation.

/9 min
Travel planning

Choose a Brazil eSIM

A practical Brazil eSIM guide for city stays, coast-to-coast routes, phone checks, local-number needs, coverage planning, and activation.

/9 min
Travel planning

Choose a New Zealand eSIM

A practical New Zealand eSIM guide for Auckland, both-island road trips, rural routes, local-number needs, device checks, and activation.

/9 min
Travel planning

Choose a South Korea eSIM

A practical South Korea eSIM guide for Seoul, Busan, Jeju, regional routes, phone checks, local-number questions, and landing-day setup.

/9 min
Travel planning

Choose a Hong Kong eSIM

A practical Hong Kong eSIM guide for city travel, airport and MTR connections, islands, Macau or mainland China add-ons, phone checks, and activation.

/9 min
Travel planning

Choose an Indonesia eSIM

A practical Indonesia eSIM guide for Jakarta, Bali, Lombok, Java, island routes, phone checks, local-number questions, and activation.

/9 min
Travel planning

Choose a Canada eSIM

A practical Canada eSIM guide for Toronto, Vancouver, Montreal, national-park routes, cross-border trips, phone checks, and landing-day setup.

/9 min
Travel planning

Choose a Germany eSIM

A practical Germany eSIM guide for Berlin, Munich, Rhine and Alpine routes, rail travel, neighboring countries, phone checks, and landing-day setup.

/9 min
Travel planning

Choose a Thailand eSIM

A practical Thailand eSIM guide for Bangkok, Chiang Mai, Phuket, islands, longer stays, local-number questions, and arrival-day setup.

/9 min
Travel planning

Choose an India eSIM

A practical India eSIM guide for city breaks, Goa and Kerala routes, longer multi-stop trips, local-number questions, device checks, and arrival-day setup.

/9 min
Travel planning

Choose a Philippines eSIM

A practical Philippines eSIM guide for Manila, Cebu, Boracay, Palawan, Siargao, multi-island routes, device checks, local-carrier tradeoffs, and arrival-day setup.

/9 min
Travel planning

Choose a Vietnam eSIM

A practical Vietnam eSIM guide for Hanoi, Ho Chi Minh City, regional routes, device checks, data planning, installation, and arrival-day setup.

/9 min
Travel planning

Choose a Turkey eSIM

A practical Turkey eSIM guide for Istanbul, Cappadocia, coastal routes, multi-city trips, device checks, arrival settings, and longer stays.

/9 min
Travel planning

Choose a France eSIM

A practical France eSIM guide for city breaks, rail trips, regional routes, EU roaming, device checks, data planning, and arrival-day setup.

/9 min
Travel planning

Choose an Australia eSIM

A practical Australia eSIM guide for city breaks, coast-to-coast routes, regional drives, device checks, data planning, and arrival-day setup.

/9 min
Travel planning

Choose a China eSIM

A practical China eSIM guide for mainland itineraries, Hong Kong add-ons, phone compatibility, data-only plans, roaming, and arrival-day setup.

/9 min
Travel planning

Choose a Mexico eSIM

A practical Mexico eSIM guide for city breaks, resort trips, road routes, border crossings, and travelers comparing roaming with prepaid data.

/9 min
Travel planning

Choose a USA travel eSIM

A practical USA travel eSIM guide for city trips, road trips, national parks, and travelers comparing roaming with prepaid data.

/9 min
Travel planning

How much travel data do I need?

Use your real phone habits, trip length, and Wi-Fi access to choose a travel data allowance without guessing.

/9 min
Travel planning

How to avoid roaming charges

Understand what triggers roaming charges, then configure your primary line and travel data line before you leave.

/8 min
Travel planning

Choose a Europe eSIM

A route-first guide to EU and EEA roaming, UK and Switzerland checks, data allowances, dual-SIM setup, and coverage for every stop.

/9 min
Travel planning

Choose a Japan eSIM

A practical guide to choosing Japan travel data for city breaks, multi-stop itineraries, rural detours, and dual-SIM phone setups.

/9 min
Travel planning

Choose a UK travel eSIM

A practical UK travel eSIM guide for city breaks, road trips, and multi-country itineraries.

/9 min
Travel planning

Choose a Spain eSIM

A practical Spain eSIM guide for city breaks, road trips, islands, EU roamers, and travelers who need clear arrival-day settings.

/9 min
Travel planning

Choose an Italy eSIM

A practical Italy eSIM guide for city breaks, island trips, rail routes, EU roamers, and travelers who want clear arrival-day settings.

/9 min
Comparisons

Travel eSIM vs. roaming

A practical comparison of two common ways to stay connected abroad, including when each option makes sense.

/8 min

Ready when you are

Read the guide. Pick the plan. Land connected.

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