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  2. Call blocking - Wikipedia

    en.wikipedia.org/wiki/Call_blocking

    [1] [2] Such devices and services enable the user to block a call as it is in progress or alternatively block the number after the call is made. These devices rely on caller ID information and thus a phone blocker requires a caller ID service active on the line for blocking to function. Treatment of blocked calls may include: Sending the caller ...

  3. Mobile phone jammer - Wikipedia

    en.wikipedia.org/wiki/Mobile_phone_jammer

    Example of a mobile phone jammer, produced by Jammerspro. A mobile phone jammer or blocker is a device which deliberately transmits signals on the same radio frequencies as mobile phones, disrupting the communication between the phone and the cell-phone base station, effectively disabling mobile phones within the range of the jammer, preventing them from receiving signals and from transmitting ...

  4. Receiving unexpected international calls? What you need ... - AOL

    www.aol.com/receiving-unexpected-international...

    2) Block suspicious numbers: Use your phone's built-in features to block these numbers and prevent future calls. 3) Report the calls: Inform your phone carrier and the Federal Communications ...

  5. Anonymous call rejection - Wikipedia

    en.wikipedia.org/wiki/Anonymous_call_rejection

    In many voice telephone networks, anonymous call rejection (ACR) is a calling feature implemented in software on the network that automatically screens out calls from callers who have blocked their caller ID information. The caller usually hears a voice message explaining that their call cannot be connected unless they display their number.

  6. EXPLAINER: Will burglar alarms still work after 3G shutdown?

    www.aol.com/finance/explainer-burglar-alarms...

    Call the companies that make or service your burglar and fire alarms and personal medical alert systems to see if any need an update. If so, schedule a service visit immediately or get a new ...

  7. The TikTok user is drawing plenty of praise online. The post TikToker reveals ‘secret’ hack for blocking spam calls on an iPhone appeared first on In The Know.