The Unique Device Identifier, or UDID, serves as a distinctive serial number for each individual iPhone. It is a 40-character hexadecimal sequence that allows developers and system administrators to identify specific devices for testing, provisioning profiles, and device management. For instance, when enrolling a device in an enterprise mobility management system or installing a beta application, the UDID is typically required.
Identifying this unique identifier offers several benefits, including the ability to sideload applications during development phases. Historically, UDIDs were broadly used for tracking user behavior, but Apple has since deprecated their usage for privacy reasons. Understanding how to access it remains relevant for certain development and administrative tasks.
