So if something goes wrong, and it always does, you’re locked out of the app. The app is often locked behind SMS 2FA on the number you’re trying to manage. Many telcos in AU/UK, if they even support ESIM, require you to provision a new sim via their app.

And outside of the US, most carriers don’t. When “transferring” an ESIM, the ESIM on the new device must be provisioned by your telco.Īpple and Google have tried to make this easy for the user by automating the process, but these nice flows only work if the carrier supports it. The fundamental problem with ESIM is that they cannot be moved between devices by the user.