How Does NFC Work In A Smartphone And What Can it Be Used for
How does NFC work in a smartphone and what can it be used for
What is NFC?
NFC stands for Near Field Communication or literally "near field communication." This technology is used to transfer data between devices at a distance of 10 cm. Communication is maintained by induction of a magnetic field.
NFC can work in active modes. For the very first, both devices must have their power supply, and for the second, one is enough. In the latter case, one of the apparatus receives its operating power from the electromagnetic region of the other.
The NFC chip itself has a reasonably compact size, which allows you to install it in smartphones, audio speakers, other mobile Phone gadgets.
What NFC Can Be Used For
Communication with other devices
Compared with Bluetooth technology, NFC has a very high speed of establishing a connection between devices. At the same time, that data transfer rate in the active communication mode is rather low. That is why in smartphones, NFC is usually used only to transfer contacts, links, notes, as well as coordinates on the map.
When transferring large files, the technology is used only to connect devices, and the content is sent via Bluetooth or Wi-Fi. This even applies to the transfer of simple video or documents through the "Send" function.
You can find out the exact location of the antenna of the chip in the instructions for the device. However, in most cases, they are displayed on the back of the case. Therefore, smartphones, when connecting via NFC, need to lean against each other with the rear panels.
Scanning and programming tags
Passive communication mode can be used to read information from programmable NFC chips or so-called cards. They do not have their power source, and activation occurs from the electromagnetic field of the reader device.
The primary purpose of labels is to obtain additional information about a product or an event. In some retail chains, NFC tags already replace barcodes. Leaning a smartphone, the buyer can get detailed information about the composition, shelf life and storage conditions.
Also, tags are used to automate various actions on a smartphone - turning on applications, changing the sound profile, sending Any messages, and so on. For example, you can program a label to start the navigator and attach it to the car. As soon as you put your Mobile on it, the gadget will start automatically.
Tags are programmed through special applications on the smartphone, such as NFC Tools.
How To Install
Card emulation
NFC devices can be used to emulate smart cards used as a pass, key, or pass. However, with the arrival of Android Google Pay, Apple Pay, and Samsung Pay payment systems in Russia, emulation of bank cards for contactless payments became the primary purpose of the NFC chip in the smartphone.
To pay for goods using NFC, bring the smartphone to the terminal at the checkout. The main thing is to pre-link your bank card to the payment system available for your smartphone.
The broadest coverage for devices has Android Pay, since it, unlike similar services of Apple and Samsung, is not intended for devices of a particular manufacturer. However, you can use any of these payment systems without fear and risk.
None of them at the time of payment transfer the card number to the terminal itself. Instead, the so-called token is used - a digitally encrypted identifier that is generated automatically when the card is activated. It will be he who will be read out as the primary requisite.
How Safe is NFC
Devices with NFC can simultaneously receive and transmit data, which allows them to detect inconsistencies if the received flag does not match the sent flag.
The risk of interception of your data is minimal, especially considering the minimum range of technology. The same Bluetooth, operating within tens of meters, is much more vulnerable to external interference.
This also applies to payment details: the token generated for contactless payment will not allow attackers to gain access to your card. And the fact of intercepting the encrypted identifier seems unrealistic.
Also, contactless payment needs confirmation via fingerprint reading, password, or face scan. Without everyone this, buying cannot be made. So, even if the smartphone is removed, no one can use it as a payment tool.
Which smartphones support NFC
Once, only expensive flagships had support for this technology, but now you can buy a smartphone with NFC for less than 10,000 rubles. In any case, this applies to devices on Android. Among the most affordable can be noted Nokia 3, Samsung Galaxy J5, Motorola Moto G5s.
In the Apple ecosystem, the cheapest smartphone with Apple Pay support is the iPhone SE, which today costs a little less than 20,000 rubles. More and more expensive models, starting with the iPhone 6, also have an NFC chip.
If you don't know if there is NFC in your Android smartphone, you can check this by searching the settings. Typically, features related to this technology are available in the connection or wireless sections. Also, the NFC icon should be present in the list of quick launch icons in the top curtain.
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