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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 ...
Cellphone surveillance. Diagram showing the operation of a StingRay device for cellphone surveillance. Cellphone surveillance (also known as cellphone spying) may involve tracking, bugging, monitoring, eavesdropping, and recording conversations and text messages on mobile phones. [ 1] It also encompasses the monitoring of people's movements ...
An international mobile subscriber identity-catcher, or IMSI-catcher, is a telephone eavesdropping device used for intercepting mobile phone traffic and tracking location data of mobile phone users. [ 1] Essentially a "fake" mobile tower acting between the target mobile phone and the service provider's real towers, it is considered a man-in-the ...
Radio jamming. Radio jamming is the deliberate blocking of or interference with wireless communications. [1] [2] In some cases, jammers work by the transmission of radio signals that disrupt telecommunications by decreasing the signal-to-noise ratio. [3]
Circuitmess Ringo (previously MakerPhone) is another DIY Arduino phone with open source firmware [77] and available schematics, [78] focusing on education. The PiPhone, [79] ZeroPhone [80] and OURphone [81] are similar, but based on the Raspberry Pi. The main components to make an open mobile phone are: Back cover; Touch screen; Battery; Logic ...
The Freedom 251 is a smartphone that was initially offered for sale in India at the promotional price of ₹251 (the equivalent of $3.39 as of 2022). Sold by Ringing Bells Private Limited, and marketed as the world's cheapest smartphone. [2] Bharatiya Janata Party MP Kirit Somaiya has stated that the phone is bogus and the promotion is a Ponzi ...
Yondr's core product is the Yondr Pouch, a device in which a person's cell phone may remain in their possession but unusable within a designated area (such as a school, performance venue, meeting room, etc.). One purpose is to prevent cell-phone photography or recording (surreptitious or not) in the designated area.
Software-defined radio ( SDR) is a radio communication system where components that conventionally have been implemented in analog hardware (e.g. mixers, filters, amplifiers, modulators / demodulators, detectors, etc.) are instead implemented by means of software on a computer or embedded system. [ 1] While the concept of SDR is not new, the ...
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