Trust the handset. The usual causes are a regional version that ships without the feature, or a carrier-tied unit. Dial *#06# and look for an EID line; if there is none, the chip is absent and no setting will change that.

Ask the seller whether it came from a carrier or was bought unlocked, then confirm the status with that carrier. No on-device menu settles it, and another operator's SIM working is not proof, since some restrictions apply to groups of carriers rather than one.

Usually not: most eSIM-capable phones run a physical SIM and an eSIM together, so you can keep your usual number for messages with its data switched off while the travel eSIM carries data. The menu for choosing which line handles data differs by brand and OS version.

Because it only knows the name you typed; it never sees your handset. Manufacturers ship one model in several market versions and some of those lack the chip. That is why we point you at the on-device check, which is both the most accurate answer and under a minute's work.

A normal travel eSIM purchase does not need it; you receive a QR code or an installation code instead. If someone asks for an EID together with other personal details in a way that does not fit, ask what it is for and hold off until you get a clear answer.