The procedure to prevent calls from unidentified numbers on Android devices involves filtering incoming calls that do not display a caller ID or originate from numbers not saved in the user’s contacts. This functionality effectively silences or diverts calls from telemarketers, spammers, and other unwanted sources, thereby reducing interruptions and potential scams.
Filtering these calls enhances privacy and minimizes distractions caused by unsolicited communications. This feature is especially beneficial in reducing exposure to fraudulent schemes and unwanted marketing efforts. Historically, individuals sought workarounds using third-party applications before native operating system features became available to address this issue.