Have you ever made a digital payment via a smartphone? This is the name of the technology!

There are still many who are not familiar with what NFC is, even though some of us may have made transactions using smartphone. So that indirectly, we have actually been in contact with NFC technology.

Technology that is increasingly developing is no exception to the technology in smartphone makes many smartphones are now equipped with various advanced features such as NFC.

Many smartphones today use NFC electric fields that operate at a frequency of 13.56 MHz, and are interconnected with the 22.11 MHz band for some special connections because the very short distance of NFC makes it difficult for NFC to work silently.

NFC or in Indonesian translation which means short-range communication is a form of short-range wireless communication in which the antenna used is shorter than the carrier signal wave (which prevents wave interference from the same antenna).

In short, NFC can be defined as near-field communication that allows your smartphone to interact with other electronic devices in close proximity.

NFC communication is a modulated electric field, or a modulated magnetic field, but not from radio electromagnetic waves. For example, a small rotating antenna (also known as a magnetic loop) produces a magnetic field, which other small rotating antennas can pick up, if they are close enough. This feature requires two compatible devices, one acting as a transmitter and one as a signal catcher.

Besides being useful for making digital payments, NFC can also easily connect other devices to smartphones, such as digital cameras. In addition, NFC can be used to store electronic payment card data and can be used as electronic "tickets" for public transportation or entry to event venues.

NFC is also independent of Wi-Fi, 3G, LTE or otherwise, and it costs nothing to use it. It's not enough that NFC also has many uses on your smartphone, namely:

• Connect your smartphone with a wireless router, headset and speakers.
• Transferring data to computers and other smartphones.
• It is possible to send phone numbers by bringing them closer to each other with NFC-enabled smartphones.
• Allows you to run applications on other smartphones.
• Provides smart card information.
• Allows you to be able to open pintu if pintu it uses the card system when opening it.

NFC History

When talking about the history of NFC, it cannot be separated from the invention of RFID or Radio Frequency Identification which was patented at that time by Charles Walton in 1983.

Leading electronics products Sony and Philips agreed to create new technology specifications and make technical outlines on March 25, 2002. Two years later, in 2, Nokia, Sony, and Philips agreed to create an NFC forum.

The forum later released the Peer-to Peer standard for transferring contacts, URLs, Bluetooth initiation, and so on in January 2009.

At that time, Samsung became the first NFC-enabled Android device by releasing the Samsung Nexus S. In the same year, in 2010, the City of Nice in the South of France launched the "Nice City of contactless mobile" project, providing its citizens with NFC generation mobile phones and bank cards. , and real services in everyday life such as transportation services, tourists, and students.

In 2011, Media Tapit was established in Sydney Australia as the first marketing company to specialize in NFC. In addition, Google I/O "How to use NFC" demonstrates NFC to start games, or share contacts, URLs, apps, videos, and so on.

A year later, in March one of the UK's most popular restaurants Eat, and Everything Everywhere (Orange operating system), teamed up to campaign for the first nationwide NFC smart poster. The campaign is led by René Batsford, head of ICT Eat.

Batsford is also credited with being the first to deploy a touchless payment solution in 2008. A specially created mobile app is activated when an NFC device comes into contact with a smart poster.

Sony then introduced "Smart Tag", which uses NFC technology to switch modes and profiles on Sony phones at close range, including the Sony Xperia P released in 2012.

In the same year, Samsung also introduced TecTile, a set of NFC stickers from MIFARE and a support application for the Android system to read and write TecTile stickers, and designed macros that could be triggered by NFC. Not to be left behind, 1 year later Apple announced Apple Pay, an NFC payment feature for iPhone 6, iPhone 6 Plus and Apple Watch.

Until now, the use of NFC is growing and is used in almost all devices such as smartphones, laptops, and many others.

Currently, the NFC feature has three operating modes, namely NFC Card Emulation (to make digital payments), NFC Reader/Writer (to transmit data in one direction), and NFC Peer-to-Peer (allows 2 NFC-enabled devices to exchange information). ).

How to activate NFC on Android

To be able to activate NFC on an Android smartphone, there are 2 ways you can do:

• Activate it on the Smartphone Quick Panel. This method is the first method as well as the easiest way that you can try. You only need to swipe up and down on your smartphone, then click the "NFC" menu

• Check in Settings
• Open the "Settings" or "Settings" menu on your smartphone.
• Click the "More Settings" or "More Settings" menu. then you will see "NFC" option

• Note that on some Android smartphones, this NFC option is in the “Network Settings” or “Networks” section.
• Select the “Share & Connect” or “Share & Connect” menu. Then activate NFC by sliding it to the “on” position.

5 List of cheap Android smartphones with NFC features

Nokia 4.2

As the first recommendation, this smartphone is equipped with dual rear cameras with a composition of 13MP main camera and 2MP for depth sensor lens. Then, for the front camera of this smartphone, it has a resolution of up to 8 MP.

Using a waterdrop display model with a 2.5D design on the front and back panels. In addition, this smartphone also supports 4G networks, Android One Pie Edition, and of course NFC.

Price Range = IDR 2.099.000 – IDR 2.450.000

Redmire Xiaomi Note Pro 9

Comes with a battery capacity of 5.020 mAh, this smartphone turns out to be priced at a fairly cheap price. It has a rear camera resolution of up to 48MP and 13MP for the front camera.

Price Range: IDR 3.029.000 – IDR 3.699.000

Samsung Galaxy A31

Talking about the performance of Samsung smartphones, it doesn't need to be doubted. In addition to having a RAM capacity of 8GB, this smartphone is also equipped with modern NFC features. Equipped with fast charging technology, this smartphone battery has a capacity of 5.000 mAh.

Price Range: IDR 3.435.000 – IDR 3.999.000

Realm 7

Claimed to have qualified performance for a mid-range class phone, this smartphone is priced at a fairly affordable price. At an affordable price, you will get a camera that has a high resolution, a 5.000 mAh battery, a Helio G95 chipset supported by 8GB of RAM, as well as a complete wireless connection.

Price Range: IDR 2.923.000 – IDR 3.590.000

5. Oppo Reno 5

Oppo Reno 5 has a Snapdragon 765G chipset which is supported by 8GB of large RAM memory. In addition, this smartphone has a 6,43-inch screen with a 1080p OLED panel and a refresh rate of up to 90 Hz.

Official Price: IDR 4.999.000.

Reference

• Wikipedia
• Tokopedia