How do they know it's you, what makes you able to download the subscription token onto your device but not me? Do you need to receive a letter, or email via WiFi somewhere? Do mobile carriers accept unauthenticated devices to let them download SIMs, or does it require WiFi always?
> How do they know it's you
You scan the QR code and then download. Sometimes there is like a code you have to enter. It's a prepaid SIM, the carriers--particularly in East Asia or Africa--aren't particularly concerned with authenticating that much.