The process of preventing calls from unidentified or withheld numbers on Android devices involves utilizing built-in features or third-party applications. For example, a user can enable a setting that silences or rejects calls where the caller’s number is not displayed.
Blocking calls from unidentified numbers enhances privacy by reducing interruptions from potential spam or unwanted solicitations. Historically, users have relied on manual methods or carrier-provided services to filter unwanted calls, but modern smartphone operating systems now offer more integrated solutions.