At checkout, the server generates a long random recovery token. You see that token once; we store only its cryptographic hash. The token is the sole credential, so there is no username, password, email login or identity record waiting behind it. The eSIM profile's ICCID is linked to that hash, a USD balance and a running megabyte counter. That is the complete customer record.
The profile is a roaming SIM issued from an ID-free jurisdiction. In each country your phone attaches to a partner network: Verizon, AT&T or T-Mobile in the US; EE, O2 or Vodafone in the UK; AIS or True in Thailand; and Docomo or SoftBank in Japan. The local network treats it like any other foreign visitor's SIM.
Billing runs per megabyte against the balance. A 300 MB day in Spain costs about $0.48, and there is no seven-day or 30-day bundle to lose. This is a genuine pay-as-you-go eSIM with an eSIM balance that never expires. Some providers call themselves no-KYC while still requiring an email and account. That is pseudonymous, but it leaves a paper trail. Plan-based providers have a different compromise: unused data disappears when the bundle ends. If the distinction matters, compare an eSIM with no registration and the best anonymous eSIM options.