Buying an eSIM takes two minutes, but the differences between providers hide in the details. These seven points decide whether your bundle actually holds up.
1. When does validity start?
With a good provider, validity starts on your first real connection abroad, not at purchase. That lets you install calmly at home.
2. Which countries are truly included?
Regional bundles often omit Switzerland, the United Kingdom, Turkey or Norway. Check the country list, not just the bundle name.
3. Is hotspot allowed?
Travelling with a partner, family or laptop means you need tethering. Not every bundle permits it.
4. Can you top up?
If your data runs out on day five of ten, you want to top up the same profile without scanning a new QR code.
5. What does unlimited mean?
Unlimited almost always means full speed up to a threshold, then slower. Read which threshold applies.
6. Do you get a phone number?
Most travel eSIMs are data profiles without a number. Call through WhatsApp or Signal, and keep your own number reachable for SMS codes.
7. Who helps when something fails?
Check for support in your language and whether you can retrieve the QR code again. A lost email should never mean a lost bundle.
In short
Do not compare price per gigabyte alone. A bundle that starts on use, covers your whole route, allows hotspot and supports top-ups is nearly always cheaper than buying a second eSIM mid-trip.