yesterday I saw an WhatsApp message in that one person showing the Samsung phone batteries He remove the rapper and take out the black color thin paper or plastic sheet which is attached with the body of the battery and there is some lines on that like a circuit and he claimed that, This is a kind of chip to spy our daily use of mobile phone is it true? Here's the answer.
That coil is most likely the NFC antenna. If you read the docs for some of the Samsung phones, only specific batteries allow the phone to have NFC capability. In other words, the NFC antenna is part of the battery pack.
NFC is the acronym for Near Field Communications. It is that technology that allows phones to transfer data back and forth just by touching them together.
NFC communications is extremely short range. A gap of a 10cm or less will stop the communications.
It is extremely unlikely that this technology can be used to spy on people without their explicit permission - the user must make the conscious choice to place their phone in direct contact with another device.
The NFC is used for the services like Google wallet or Samsung's own Samsung pay like systems. It has nothing to do with your personal info or any other media in your it just connects two phone with each other wirelessly.
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