NFC in Xiaomi Phone: What It Is and How to Use It

Modern smartphones have become versatile tools to replace wallets, keys and pass cards. Owners of Xiaomi, Redmi and Poco devices often wonder how to activate contactless communication to simplify everyday tasks. NFC-The module has become a standard even in the budget segment, but not all users know about its full functionality.

Near Field Communication technology allows you to share data at a distance of up to 10 centimeters, which provides high security, since an attacker needs to be in close proximity to your gadget. In the Xiaomi ecosystem, the implementation of this feature has its own features that are worth considering in more detail.

With this chip, you can pay for shopping, you can go through subway turnstiles, you can pair devices quickly, but you need to configure the software part of MIUI or HyperOS to work properly, and then we'll look at all the aspects of using this module.

What is NFC Technology and How Does It Work?

Near Field Communication is a short-range wireless standard that operates at 13.56 MHz and allows two devices to communicate when they are held together. In Xiaomi smartphones, the antenna is usually built into the top of the case or located next to the camera block.

The principle of operation is based on electromagnetic induction. When you bring the phone to the reader, the terminal creates a field that powers the passive chip in the smartphone or activates its transmitter. Data exchange takes a fraction of a second, making the process almost instantaneous for the user.

There are three main modes of operation that the NFC module supports:

• 📱 Emulation of cards: the phone pretends to be a plastic bank card or travel card.
• 📡 Reading and writing: A smartphone reads information from tags (such as smart stickers) or writes data to them.
• 🔄 P2P (Peer-to-Peer: file or contact exchange between two phones (Android Beam mode).

⚠️ Note: For card emulation, the smartphone screen does not necessarily need to be unlocked, but for payments the amount of which exceeds a certain limit, the system can request unlocking or biometrics.

It's important to understand that data transfer speeds are slow, so the technology is not suitable for transferring large files like video, its main advantage is connection speed and security (HCE), This allows you to emulate the card without using SIM-map.

How to check for and enable NFC on Xiaomi

Before you start using it, you need to make sure that your device is equipped with the appropriate module. Not all budget models Poco or Redmi have this chip, although they may look like more expensive versions.

Open the Settings menu and search the line at the top of the screen. Enter "NFC." If the module is present, the system will suggest you go to the appropriate switch. Also, you can add a quick access icon to the notification curtain for convenience.

An alternative way to check is to use special Google Play apps, such as NFC Check, which will instantly determine if the phone has hardware support and if the antenna is working correctly, and if the app says "NFC Not Supported," then the chip is physically missing.

The activation process is as follows:

1. Swipe down from top to top to open the control center.
2. Find the NFC icon (sometimes hidden in the optional button editing menu).
3. Press it to make it light up in blue.
4. Make sure that the Connected Devices menu status is active.

Once turned on, the phone will periodically vibrate or make a sound when approached by readers, signaling readiness for work. In some MIUI firmware for different regions, the path to settings may be slightly different, but keyword search always works.

Contactless Payment via Google Pay and Mi Pay

One of the most popular features is payment by phone, which uses Google Pay (or its successor, Google Wallet), unlike iOS, where Apple Pay works, on Android, the main tokenization system is the solution from Google.

To get started, you need to add a bank card to the Google Wallet app, check the card via SMS or a call from the bank, then create a virtual token, and the real card number is not transferred to the seller, which increases the security of the transaction.

Xiaomi smartphone owners can also use Mi Pay, which is supported by some banks in certain regions, and allows you to link cards directly to the Mi Credit or Wallet system app.

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If the payment doesn't pass, try removing the protective case. Metalized or too thick silicone cases can shield the antenna signal.

When you pay, you don't have to open the app, you just unlock your smartphone (input a pin code or attach a finger) and put it with the top end to the terminal, and tokenization ensures that the seller doesn't see your card number.

Using NFC for transportation

Xiaomi smartphones successfully replace the plastic cards Troika, Plantain and other transport cards in major cities, and for this card must support the NFC standard (usually cards with a chip, not magnetic tape).

To link a transport card, you need to download the official application of the transport operator or aggregator (for example, Metro Moscow or Where Transport), the option "Tie the card" or "Recharge by NFC" is selected in the application.

After scanning the plastic card with the phone, the balance is transferred to the virtual space, then you need to go through the turnstile:

• 🚌 Unlock the smartphone screen.
• 🚇 Bring the top of the phone to the turnstile reader.
• 💳 Wait for the sound signal and the green indicator.

⚠️ Note: When using a phone instead of a card in the subway, the interval between repeated passes through the turnstile can be increased by the security system.

It is important to note that this feature does not require Internet access at the time of passage, since ticket data is stored in the phone’s secure memory, but a network connection will be required to replenish the balance.

Some users are faced with a situation where the terminal does not see the phone, in which case it is worth checking whether the battery in the phone is not completely dead (some cards require a charge), and whether you are positioning the device correctly relative to the reader.

Automation of tasks by means of NFC-marker

In addition to paying, the module allows you to run automation scenarios, and by buying inexpensive programmable tags, you can set the phone up to do touching, which is one of the most underrated features in Android.

To record scripts, you use Tasker or specialized utilities like NFC Tools, and you can program the tag to turn on the alarm clock, start the navigator, or turn your phone into silent mode.

Examples of useful use of labels in the home:

• 🏠 Label at the entrance: turns off Wi-Fi, turns on mobile Internet and sets the volume to maximum.
• 🛌 Tag on the nightstand: includes the "Do not disturb" mode, alarm clock and reduces the brightness of the screen.
• 🚗 In-car tag: Starts the navigator, turns on Bluetooth and reads incoming messages.

The implementation of such scenarios turns Xiaomi smartphone into a control center of the smart home. You do not have to unlock the phone every time and look for the right application – one touch of the sticker triggers the whole set of actions.

Frequent problems and ways to solve them

Despite the reliability of the technology, users can face difficulties, most often due to software failures in the MIUI shell or physical obstacles, and if the phone stops seeing cards, the first thing to do is to restart the device.

Sometimes the module can shut down on its own due to system errors, and resetting the network settings will help. Go to Settings → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth. This will not delete your personal data, but will return the network settings to factory settings.

Common causes of malfunctions:

1. Mechanical damage to the antenna (fall, impact).
2. Application conflict (third-party launchers or banking utilities).
3. The presence of a metal insert in the case.
4. An outdated version of the firmware.

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In 80% of cases, the problem is solved by simply restarting the phone or removing the case. If this does not help, check the module in safe mode.

If none of these methods helped, they may have failed themselves. NFC-In this case, you'll need to have a diagnostic at a service center, but software failures are much more common than hardware.

Data security with NFC use

Security concerns many users, and NFC is considered one of the most secure technologies because of its short range, and it's almost impossible for an attacker to read your phone's data from a distance while you're holding it in your pocket.

In addition, the payment uses dynamic code that changes with each transaction. Even if a hacker somehow intercepts the signal, he will not be able to use this data again. Xiaomi smartphones additionally use a secure Secure Element element.

⚠️ Warning: Never read labels of unknown origin that strangers bring to you. In theory, a malicious label could try to open a link in a browser or launch an application.

For maximum protection, it is recommended to install PIN-In the Google Pay settings, you can also require mandatory biometric authorization for each purchase, regardless of the amount of money.

FAQ: Frequently Asked Questions