I need a concise technical brief—roughly one to two pages—showing exactly how an iPhone can pull saved payment details into a checkout form through browser autofill or other synced data sources. Center the walkthrough on Safari, since that is the main target environment, but feel free to note where the same flow would mirror in Microsoft Edge on iOS so a reader can see the parallel. The write-up must: • Map out where card data lives on the device (Keychain, iCloud Keychain, Wallet / Apple Pay records, etc.) and how the system chooses which values to surface when a web form is detected. • Describe the hand-off sequence from stored data to the browser’s autofill engine, with Face ID acting solely as the confirmation step—no deep dive into security analysis is needed, just name Face ID as the gatekeeper. • Clarify any behind-the-scenes sync that may occur (for example, when the user has multiple Apple devices tied to the same Apple ID). Deliverable: a PDF or DOCX, 1–2 pages, that flows logically from storage layer to on-screen autofill, finishing with the Face ID prompt. No security-risk discussion is required; the audience only needs the functional mechanics.