NFC on Xiaomi Redmi 9: A Complete Guide to Setup and Use

What is NFC in Redmi 9 and why is it necessary?

The Xiaomi Redmi 9’s NFC (Near Field Communication) technology opens up the possibility of contactless operations that many users are left undisclosed.The chip allows data to be exchanged up to 10 cm without an internet connection, making it indispensable for fast transactions and task automation. Unlike Bluetooth or Wi-Fi, NFC consumes minimal energy and is only activated when approaching another device or tag.

The main use cases on Redmi 9 include contactless payments via Google Pay or Mi Pay, transfer of contacts and files between phones, work with smart tags to automate home tasks (for example, turning on Wi-Fi when approaching the door), as well as identification in transport or office access control systems. It is important to understand that the functionality of NFC depends on the version of the MIUI firmware and regional restrictions - some features can be blocked by the manufacturer.

Redmi 9 uses the NXP PN54T chip, which supports ISO 14443 (for payment cards) and ISO 18092 (for data exchange between devices). However, not all Redmi 9 models are equipped with NFC, this depends on the region of sale. For example, the versions for India (Redmi 9 Prime) often do not have this module, while the European and Russian versions (Redmi 9T NFC) are equipped with it by default.

How to check for NFC in your Redmi 9

Before you set up NFC, make sure your Xiaomi Redmi 9 is equipped with it. The most reliable way is to check the specifications of the device by model.

1. Open the Settings. → The phone.
2. Find the device model line (e.g. M2003J15SC for the global version).
3. Type the model into a search engine and ask for "NFC specification."

An alternative method is to use the AIDA64 app (available on Google Play):

• 📱 Install and open the application.
• 🔍 Go to the System section → Chipset.
• 🔧 Check for a point. NFC Controller – if any, the module is present.

If NFC It's missing, you can't physically add it, because it's soldered into the motherboard. NFC-interface-adapter USB-C 3.5mm jack, but note that these devices often require root rights and do not support payment systems.

⚠️ Attention: On some firmware MIUI point NFC It can be hidden in the engineering menu. To activate it, type ##4636## in the dialer, then select Phone Information. → Menus. NFC. If there is no option, there is no module.

💡

If you are buying a used Redmi 9, be sure to check the NFC before payment – sellers often keep silent about the regional limitations of the model.

Step-by-step: how to turn on NFC on Redmi 9

Activation of NFC on Xiaomi Redmi 9 takes less than a minute, but requires the right sequence of actions.

1. Open Settings (the gear icon on the main screen).
2. Go to Connections and Sharing (or Wireless Networks in older versions of MIUI).
3. Slip on the NFC item – if there is none, use the search by settings (the magnifier in the upper right corner).
4. Activate the NFC slider, it will turn blue.
5. (Optional) Enable Android Beam to transfer files (required on both devices).

Once activated, an NFC icon (a stylized letter "N") will appear in the status bar. If the icon does not appear, reboot the phone - this will reset the cache of system services. On Redmi 9 with MIUI 12+, the Quick Settings function is also available: swipe down from the top of the screen and find the NFC tile (it can be fixed for convenience).

If NFC is not included, the reasons may be as follows:

• 🔋 Battery discharge – the module is turned off at a charge level below 15%.
• 🛠️ The antenna's damaged. NFC (located under the back cover near the camera).
• 📱 Installed custom firmware without drivers NFC.
• 🔒 Regional restrictions – some firmware functions are blocked.

⚠️ Note: Redmi 9 with firmware for China ROM) NFC It may not work properly due to the lack of Google Pay certification. ROM or EEA ROM.

Configure contactless payments via NFC

The main application of NFC on Redmi 9 is payment for purchases by smartphone. This requires linking a bank card to one of the payment services. In Russia and CIS countries, Google Pay, Mi Pay (for Mir cards) are available, as well as banking applications with support for Host Card Emulation (HCE) (Sberbank Online, Tinkoff).

Instructions for Google Pay:

1. Download Google Pay from the Play Market.
2. Open the app and click Start → Add a map.
3. Scan the map with the camera or enter the data manually.
4. Confirm the binding via SMS or push notification from the bank.
5. Install Google Pay as the default application for contactless payments in Settings → Apps → By default.

To pay, bring the unlocked Redmi 9 to the terminal at a distance of 2-5 cm The screen must be turned on, but unlock by fingerprint or PIN-No code required (if the amount is less than 1000-1500 rubles, depending on the bank). MIUI 13+ Payment is supported even when the screen is turned off - it is enough to press the power button twice.

If payments fail to pass:

• 🔄 Restart the phone and terminal.
• 📵 Make sure that the contactless mode is enabled on the terminal.
• 🛡️ Check if the cover is blocking the signal. NFC (metal covers often interfere).
• 🔧 Update the Bank and Google Pay app to the latest version.

💡

For security, disable NFC after payment if you don’t plan to use it any further, and this will prevent unauthorized readings.

Transfer data and files over NFC to Redmi 9

With NFC, you can quickly exchange contacts, photos or links between two smartphones. Redmi 9 uses Android Beam technology (in newer versions of MIUI, it can be called Quick Transfer), the transfer process takes several seconds and does not require an Internet connection.

How to transfer the file:

1. Enable NFC on both devices (see section above).
2. Open the file (photo, contact, or web page) you want to send.
3. Put the back panels of the phones together, they should touch each other.
4. Wait for the sound signal or vibration (means the connection is established).
5. On the screen will appear a notification Touch for transmission – tap on it.

Limitations of the method:

• 📁 You can transfer only one file at a time (maximum size – 1-2 MB).
• 📱 Both devices must support Android Beam (not working with iPhone).
• 🔋 Transmission is interrupted if the battery is below 10%.
• 🚫 No video, archive or document over 5MB is supported.

For large files transfer, it is better to use Mi Share (built-in MIUI function), which combines Wi-Fi Direct and Bluetooth. NFC in this case serves only to initialize the connection:

1. Enable Mi Share in Settings → Connections and Sharing.
2. Select files in the gallery or file manager, click Send → Mi Share.
3. Bring Redmi 9 to the second device and the connection will be automatically established.

Use of the NFC-tags

NFC-Labels are small chips that can be programmed to perform certain actions when a smartphone approaches, and on Redmi 9, they allow you to automate routine tasks like turning on Wi-Fi at home, running a navigator in your car, or putting your phone into silent mode at work. It'll take a job:

• 🏷️ NFC-tags (cost from 50 rubles apiece, sold in the form of stickers or key fobs).
• 📱 Programming applications (e.g. Trigger or NFC Tools).
• 🔧 On. NFC smartphone.

Example of setting up a tag for home Wi-Fi:

1. Install the NFC Tools app.
2. Open the Write → Add the record → Wi-Fi.
3. Enter the network name and password, save it.
4. Put the tag on the back of Redmi 9 and the data will be recorded.
5. Put a tag on the front door, and now when the phone comes up, Wi-Fi will turn on automatically.

Other useful scenarios:

• 🚗 In the car: tag on the dashboard starts Google Maps and turns on Bluetooth for hands-free.
• 📵 At work: a tag on the table puts the phone in Do not disturb mode.
• 🎵 In the car: The tag in the cabin includes your favorite playlist in Spotify.
• 🔋 On charging: the tag next to the socket activates the energy saving mode.

Note: Redmi 9 supports NFC Forum Type 1-4 and MIFARE Classic tags, but does not work with MIFARE DESFire (used in some skips). For complex automations (for example, sending SMS when triggered), you will need the Tasker app + NFC Task Launcher plugin.

⚠️ Note: Do not store confidential data (passwords) on tags, PIN-They can be easily read by another. NFC-device.

Solving NFC Problems on Redmi 9

If the NFC on Xiaomi Redmi 9 is unstable or not turned on at all, follow the diagnostic algorithm:

1. Check hardware support: As described in Section 2, make sure the module is physically present.
2. Update your firmware: go to Settings → About Phone → System Update and install the latest version of MIUI.
3. Reset network settings: in Settings → System → Settings Reset → Network settings reset (this will remove saved Wi-Fi and Bluetooth devices).
4. Clear the NFC cache: Go to Settings → Apps → All apps → NFC and click Clear the cache.
5. Check the antenna: If the phone falls, damage to NFC contacts is possible (disassembly required).

Common mistakes and ways to eliminate them:

If the problem persists, try rolling back the firmware to an older version of MIUI (for example, from 14th to 13th), as new updates sometimes appear bugs with NFC.

1. Download the desired version of MIUI from the official Xiaomi website.
2. Go to Settings → About Phone → System Update → Three Points → Select an Service Pack.
3. Specify the path to the downloaded file and wait for the process to be completed.

In extreme cases, contact the service center - the NFC malfunction may be associated with damage to the motherboard (for example, after moisture enters).

FAQ: Frequent questions about NFC on Redmi 9