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2. Fixed Dialing Number - Wikipedia

   en.wikipedia.org/wiki/Fixed_dialing_number

   Fixed Dialing Number (FDN) is a service mode of a GSM mobile phone's SIM card. [1] Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those numbers listed, or to numbers with certain prefixes. [1] A notable exception is that emergency calls to 000, 112, 911, 999 and the like are exempt. [2]

3. IMSI-catcher - Wikipedia

   en.wikipedia.org/wiki/IMSI-catcher

   All mobile phones in the area covered by the catcher have no access to the network. Incoming and outgoing calls cannot be patched through for these subscribers. Only the observed person has an indirect connection. There are some disclosing factors. In most cases, the operation cannot be recognized immediately by the subscriber.

4. Caller ID - Wikipedia

   en.wikipedia.org/wiki/Caller_ID

   Caller ID blocking is the common term for a service by which a caller can prevent the display of the calling number on the recipient's telephone. Blocking the number is formally referred to as calling line identification restriction (CLIR). This customer option was part of the legal authorization for New York State's 1992 authorization of ...

5. TikToker reveals ‘secret’ hack for blocking spam calls on an ...

   www.aol.com/tiktoker-reveals-secret-hack...

   Tech Social 101’s first tip helps with blocking calls from potential scammers. To use this setting, first, go to Settings, then click on Phone and turn on the feature labeled “Silence Unknown ...

6. 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 ...

7. TikTok user reveals ‘super helpful’ iPhone hack for blocking ...

   www.aol.com/entertainment/tiktok-user-reveals...

   A TikTok user is going viral after sharing his hack for how to report spam texts on an iPhone. In his video, @kadama shows how to report spam texts on an iPhone in just a few quick steps. To start ...