Verification, privacy SMS, and travel eSIM field guides

SMS verification

How to use a temporary phone number for low-risk QA and account-flow testing without turning it into a recovery-number liability.

When public online SMS receivers are acceptable, when private sessions are safer, and which questions to ask before sending a code.

A pre-trip checklist for choosing an eSIM data plan, installing it over Wi‑Fi, and avoiding surprise activation timing.