NFC in Xiaomi Redmi smartphones: a complete guide to functions and configuration

Have you ever noticed a small inscription on the body of your Xiaomi Redmi «NFC» Or maybe you've stumbled across a mysterious section of Contactless Payments in your smartphone settings? If so, you've already encountered one of the most useful, but often underappreciated, technologies of today's smartphones.

NFC (Near Field Communication is a short-range wireless communication protocol that allows data to be exchanged between devices at a distance of up to 10 cm. It allows you to access contactless payments, fast file transfers, smart device management, and even automation of routine tasks. NFC, How to set it up – this is what many users do not even know.

In this article, we will discuss all aspects NFC From basic principles to hidden features that are not written in the official instructions, you will learn how to turn your phone into a universal tool for payment, data exchange and management of equipment – without unnecessary applications and complex manipulations.

What is NFC and how it works in Xiaomi Redmi smartphones

NFC — It is a two-way wireless communication technology that operates at 13.56 MHz and provides data exchange at speeds up to 424 kbit / s, NFC It doesn't require devices to pair: it's just enough to hold them together. NFC usually located at the top of the rear panel (near the camera) or under the battery – the exact location depends on the model.

The technology is based on three modes of operation:

• 🔄 Active mode: both devices generate their own electromagnetic field (used to exchange data between smartphones).
• 💳 Passive mode: One device (e.g., a payment terminal) creates a field, while the second (your Redmi) only responds (used in contactless payments).
• 📱 Card emulation: A smartphone simulates a contactless card (e.g., a transport or bank card).

At Xiaomi Redmi NFC chip-operated NXP (In most models, or Broadcom (older devices), the chip is responsible for data encryption, cloning protection and international standards compatibility (e.g., data encryption, ISO/IEC 14443 I wonder what it is that's the case. NFC Redmi can work even when the screen is off – if the function is activated in the settings.

⚠️ Attention: NFC Xiaomi smartphones consume minimal energy, but if you don’t use contactless payments, it’s recommended to manually disable the module) NFC remains active in the background, which can reduce battery life by 2-5%.

Xiaomi Redmi models support NFC

Not all Xiaomi Redmi smartphones are equipped with a module NFC — It depends on the series, the region of sales and the year of production. 9A or Redmi 8A This feature is not available, while the Redmi flagships are K50 Pro or Redmi Note 12 Pro+ They support it out of the box. Below is a table of current data on popular models:

It is important to note that even if the Redmi model is equipped with a NFC, The functionality of the device may vary depending on the regional firmware, for example, in Chinese versions of smartphones, support for Google Pay is often disabled, but Mi Pay (Chinese equivalent) is available. NFC on his device:

1. Open Settings → Connections and Sharing → NFC.
2. If there is no section, use the application. CPU-Z (sensors).
3. Try downloading the app. NFC Tools from Google Play – if the module is missing, the program will give an error.

Main functions NFC Xiaomi Redmi: From Payments to Automation

NFC Xiaomi Redmi is not just about contactless payments, it's about dozens of tasks that many users don't even know they're doing:

1. Contactless payments

The most popular function NFC — You can pay for your smartphone at Redmi:

• 💳 Google Pay (powered by global firmware) MIUI).
• 🏦 Mi Pay (Chinese service, requires a Chinese bank card link).
• 🚇 Emulation of transport cards (for example, Troika or Strelka in Moscow).

To set up payments:

1. Add a bank card to Google Pay or Mi Pay.
2. Activate NFC in the settings.
3. When paying, unlock your phone and bring it to the terminal (no need to open the app!).

2. Data transfer (Android Beam)

With help. NFC You can quickly share files, contacts, or links between two smartphones:

1. Turn on NFC and Android Beam in the settings.
2. Open the file (photo, video, contact).
3. Hold the phones back to each other and the transfer will start automatically.

Important: Android Beam works only between devices on Android 4.0-9.0. MIUI This feature is replaced by Quick Share (requires Wi-Fi Direct).

3. Managing smart devices

NFC-Labels (such as Mi Smart Tags) allow you to automate routine activities:

• 🔑 Unlocking a smart lock when holding the phone.
• 🎵 Starting a playlist when touching a tag in the car.
• 🌙 Turning on the night mode when bringing the smartphone to the bedside table.

4. Reading tags and maps

With apps like this. NFC Tools or Trigger can be read from the:

• 🏷️ NFC-labels (for example, in museums or shops).
• 📇 Business card NFC-chip.
• 🚪 Electronic passes (if emulation is supported).

💡

If your Redmi doesn't recognize you. NFC-try wrapping it in thin paper or tape – sometimes the metal body of the phone interferes with the signal.

How to Enable and Configure NFC on Xiaomi Redmi

Activation. NFC Xiaomi Redmi takes less than a minute, but many users are facing problems due to firmware Differences or regional restrictions:

1. Open the settings and go to Connections and Sharing (or Wireless Networks in older versions of MIUI).
2. Find a point «NFC»** and move the slider to the "On" position.».
3. Set up the parameters: 🔘 Turn on Android Beam (if you need to transfer files). 🔘 Activate Default Payments (for Google Pay). 🔘 Select Card Mode (if you plan to emulate a transport card).

Check the work.

If NFC is not activated:

• 🔄 Reboot the phone.
• 📱 Check if the module block the case with metal elements.
• 🛠️ Update. MIUI Up to the latest version (in old firmware there are bugs with the NFC).

Some models (e.g. Redmi Note 10) NFC It can turn off automatically to save charge. To avoid this, go to Settings. → Battery → Battery optimization and add payment apps (like Google Pay) to the exclusion list.

Problems with NFC Xiaomi Redmi and its solutions

Despite the reliability of the technology, users of Xiaomi Redmi sometimes face errors. NFC. Here are the most common problems and ways to fix them:

If none of the methods helped, check the hardware serviceability. NFC-- For this:

1. Run the equipment test using ##4636## (Phone Information section) → Testing of equipment).
2. Or use the app. NFC Check from Google Play.

⚠️ Attention: If NFC stopped working after the phone fell or moisture got in, most likely the antenna module was damaged, in which case repair is required at the service center - self-replacement of the chip can lead to loss of warranty.

Hidden opportunities NFC Xiaomi Redmi: life hacks and automation

Few people know that NFC Xiaomi Redmi can be used to automate everyday tasks without additional applications:

1. Quick application launches

With help. NFC-Tags (e.g. Xiaomi Mi Smart Tag) can be configured:

• 🎮 Automatically start the game when touching the phone to the tag on the table.
• 📖 Opening a book in Google Play Books when you bring it to the label on the nightstand.

Use the Trigger or Automate app to do this.

2.Managing a smart home

NFC-tags can be programmed to:

• 💡 Turning on/off lights (Mi Home or Google Home).
• 🌡️ Change in temperature on the air conditioner.
• 🔒 Opening of a smart lock (Aqara, Yale).

Emulation of transport cards

In some regions (for example, Moscow or St. Petersburg) Xiaomi Redmi can be used instead of Troika or Strelka:

1. Download the application My travel card (for Moscow) or Pomorodnik (for Peter).
2. Link the virtual card to the phone.
3. Activate the emulation mode in the NFC settings.

4. Secure authentication

NFC can be used:

• 🔐 Two-factor authentication (e.g., in the 1Password or LastPass).
• 🖥️ Quickly log in to Windows via Windows Hello (required) NFC-PC reader).

Example of automation settings with NFC-marker:

1. Buy it. NFC-mark (e.g., marker, NTAG213 50-100 rubles).
2. Install the Trigger app.
3. Create a task: “When scanning the tag → Turn on Wi-Fi, start Spotify, set the volume to 70%».
4. Write the task down on a tag and attach it to the keys or table.

💡

NFC-Labels can be rewritten up to 100,000 times, enough for years of use, NFC Stickers).

NFC Security: How to Protect Your Data

Despite the convenience, NFC — It's a wireless data technology, which means it's potentially vulnerable to attack. Xiaomi Redmi has several layers of protection:

• 🔒 Encryption: All transactions via Google Pay or Mi Pay are protected by the standard EMV (bank-card).
• 🛡️ Dynamic codes: Each payment generates a unique token that cannot be reused.
• 👤 Biometrics: Fingerprint or facial recognition can be used to confirm payments.

However, there are risks:

• 🕵️ Skimming: Attackers may try to intercept card data using special equipment (but this is unlikely due to the short range of action). NFC).
• 📱 Loss of phone: If the phone falls into the wrong hands, the scammer will be able to make payments without unlocking (unless biometrics are configured).

To keep yourself safe:

1. Set up a screen lock (PIN, pattern lock or fingerprint).
2. Turn off NFC when not in use.
3. Do not store multiple bank card details on your phone.
4. Use tokenization-enabled apps (Google Pay, Apple Pay) rather than linking the card directly.

⚠️ Note: If you sell or transfer your Xiaomi Redmi to another person, be sure to remove all associated cards from Google Pay/Mi Pay and reset your settings, even after-hard reset some data NFC It can be stored in the protected memory of the chip.

FAQ: Frequent questions about NFC in Xiaomi Redmi