TDK
Travel Data Kit
Travel preparation guide

eSIM, roaming and digital safety before you travel

Know what you need before you land. Choose mobile data, avoid roaming mistakes, and keep access to your accounts and documents — wherever you travel from.

📶 I need mobile data abroad Compare eSIM options by destination ⚠️ I want to avoid roaming mistakes eSIM vs roaming — when each makes sense 🔒 I use public Wi-Fi When a VPN helps and when it does not 🔑 I need access to important accounts Keep banking, email and bookings accessible 📄 I carry important documents Cloud backup and offline copies before departure 🧳 I want the full checklist Complete digital preparation before any trip
Choose your destination
eSIM guides with verified plans, network details and field tips.
Turkey Install before arrival — important 2025 rule change USA Roaming can be expensive — eSIM is often simpler Japan Essential for maps, trains and reservations Thailand Good for longer stays and heavy data use Dubai / UAE Get connected before leaving the airport Mexico Roaming costs vary widely by home carrier Indonesia / Bali Useful for remote work and long stays Egypt Prepare before arrival — local setup can be slow
See all eSIM guides →
What Travel Data Kit covers
Four problems, four practical guides. No upselling.
PROBLEM → GUIDE
Mobile data is expensive or unclear with my home carrier → eSIM guides
I use hotel or airport Wi-Fi and handle sensitive accounts → VPN guide
I need access to banking, bookings and email while travelling → Password guide
I want my passport, tickets and insurance accessible offline → Documents guide
Before you buy an eSIM

Check your home carrier first. If your roaming option is clear, sufficient and cheaper, use it. This site does not push eSIMs when roaming is a better fit.

eSIM vs roaming — read the guide →
Three eSIM providers reviewed
Honest assessment — who each provider is for, and who should avoid it.
AIR
Airalo
Best for short trips and smaller data plans. Wide destination coverage. Data-only.
Budget-friendly Read review
SAIL
Saily
App-first, backed by Nord Security. Clear setup, built-in ad blocker. Hotspot included.
Simple setup Read review
HOLA
Holafly
Unlimited data plans for heavy users. More expensive than fixed plans. Fair use policy applies.
Unlimited data Read review
The full digital travel kit
eSIM for mobile data
VPN for public Wi-Fi
Password manager
Cloud + offline docs
See the complete preparation checklist →
How this site works

Travel Data Kit is a practical preparation guide for travellers. Guides are origin-neutral — written for travellers coming from any country, not only Europe. eSIM, roaming, VPN, passwords and documents are treated as separate tools that solve separate problems. We do not recommend an eSIM when roaming is clearly enough. Some links are affiliate links — see our disclosure. Recommendations are based on practical use, product limits, and the context of the traveller.

How we choose travel tools →
Affiliate disclosure. Some links on this site are affiliate links. If you buy through them, we may earn a commission at no extra cost to you. Our recommendations are based on practical travel use, product limits and the needs of the traveller.