What do I need before buying an eSIM?
Author: eSIMonline Editorial · eSIMonline editorial teamLast updated: September 5, 2026

An eSIM-capable device that is not carrier-locked, your destination and travel dates, and Wi-Fi at installation time. That is all.
- A device that supports eSIM: check with our device checker
- A device that is not carrier-locked, since a locked one may refuse another provider's profile
- Your destination and firm dates, so the validity covers the trip
- Wi-Fi at install time, which should be before you leave